Tier A
Investigation authorities, regulators, police, coroners, courts, workplace-safety bodies and official avalanche organizations.
Open methodology · Evidence before certainty
Incident archive methodology and coverage
The long-term ambition is every known heli-ski-related accident. The defensible public claim today is narrower: all publicly verifiable cases within our documented coverage.
What is included
Commercial heli-skiing, heli-boarding and documented heli-assisted ski touring from 1950 onward are systematically researched. Aviation accidents and serious incidents, rotor-running ground events, fatal or serious avalanche events, serious falls and collisions, crevasse or tree-well events, verifiable activity-linked medical deaths, and authoritative safety-value near misses can qualify.
What is excluded
Unrelated recreational skiing, unsubstantiated forum or social reports, minor injuries without lasting safety value, private flights without a verified commercial connection, unrelated rescue missions and speculative heli-ski links are excluded. Excluded candidates remain private with a reason so they are not repeatedly researched.
Evidence and publication threshold
Tier B
Operators, flight operators, manufacturers and professional industry organizations.
Tier C
Established independent local, aviation-trade and specialist journalism.
Tier D
Forums, social media, personal blogs and unverified accounts; discovery leads only.
A public record needs one relevant Tier A source, or two independent credible Tier B/C sources with a visible reported/corroborated label. Every material summary statement must map to evidence; unresolved conflicts in core date, place, activity or outcome block publication. Tier D can never establish a public fact by itself.
Coverage ledger
Completeness is measured in coverage cells: jurisdiction × period × source family × query method. “Complete” is reserved for a bounded source enumeration. A general web search can be partial or substantial, never proof that zero returned results means zero incidents.
0Complete
20Substantial
64Partial
705Not yet reviewed
2Source unavailable
| Jurisdiction and period | Source | Query | Status | Last successful scan | Known limits |
|---|---|---|---|---|---|
| AR 1950-01-01–2026-08-22 | Argentina Transportation Safety Board Aviation investigation authority | Official event map and statistics Language: es | Partial | 23/08/2026 | Wave 3; ledger incident-coverage-2026-08. Tracked source gap: https://github.com/marcus-hgic/heliski-26/issues/135 Known limitation: Published annual statistics located for 2016–2023 are not an incident-level historical export. Known limitation: Older occurrence records and activity classification require an authority data request. |
| AR 1952-01-01–1956-12-31 | Argentina Transportation Safety Board Authority | Operator location and incident terms Language: es | Not yet reviewed | Not yet successful | None recorded |
| AR 1957-01-01–1961-12-31 | Argentina Transportation Safety Board Authority | Operator location and incident terms Language: es | Not yet reviewed | Not yet successful | None recorded |
| AR 1962-01-01–1966-12-31 | Argentina Transportation Safety Board Authority | Operator location and incident terms Language: es | Not yet reviewed | Not yet successful | None recorded |
| AR 1967-01-01–1971-12-31 | Argentina Transportation Safety Board Authority | Operator location and incident terms Language: es | Not yet reviewed | Not yet successful | None recorded |
| AR 1972-01-01–1976-12-31 | Argentina Transportation Safety Board Authority | Operator location and incident terms Language: es | Not yet reviewed | Not yet successful | None recorded |
| AR 1977-01-01–1981-12-31 | Argentina Transportation Safety Board Authority | Operator location and incident terms Language: es | Not yet reviewed | Not yet successful | None recorded |
| AR 1982-01-01–1986-12-31 | Argentina Transportation Safety Board Authority | Operator location and incident terms Language: es | Not yet reviewed | Not yet successful | None recorded |
| AR 1987-01-01–1991-12-31 | Argentina Transportation Safety Board Authority | Operator location and incident terms Language: es | Not yet reviewed | Not yet successful | None recorded |
| AR 1992-01-01–1996-12-31 | Argentina Transportation Safety Board Authority | Operator location and incident terms Language: es | Not yet reviewed | Not yet successful | None recorded |
| AR 1997-01-01–2001-12-31 | Argentina Transportation Safety Board Authority | Operator location and incident terms Language: es | Not yet reviewed | Not yet successful | None recorded |
| AR 2002-01-01–2006-12-31 | Argentina Transportation Safety Board Authority | Operator location and incident terms Language: es | Not yet reviewed | Not yet successful | None recorded |
| AR 2007-01-01–2011-12-31 | Argentina Transportation Safety Board Authority | Operator location and incident terms Language: es | Not yet reviewed | Not yet successful | None recorded |
| AR 2012-01-01–2016-12-31 | Argentina Transportation Safety Board Authority | Operator location and incident terms Language: es | Not yet reviewed | Not yet successful | None recorded |
| AR 2017-01-01–2021-12-31 | Argentina Transportation Safety Board Authority | Operator location and incident terms Language: es | Not yet reviewed | Not yet successful | None recorded |
| AR 2022-01-01–2026-08-31 | Argentina Transportation Safety Board Authority | Operator location and incident terms Language: es | Partial | 31/08/2026 | The named Argentina Transportation Safety Board (JST) source was searched directly, including its official aviation investigation search pages, helicopter safety material and the JST open-data aviation-record resource. The current official JSON resource was inspected for the date interval available in the resource and searched for helicopter records and the terms heliski, heli-ski and esquí. Additional ordinary web searches were run in Spanish and English for Argentina heli-skiing, helicopter accidents and ski-related incidents from January 1, 2022 through July 31, 2026. No qualifying in-scope commercial heli-ski, heli-boarding or heli-assisted touring incident was identified. Coverage remains partial because ordinary web search is not an exhaustive search of all unpublished, unindexed or non-digitized records; the official aviation resource was last updated June 19, 2026 and therefore does not establish complete coverage through July 31, 2026; and the JST web investigation interface was not fully enumerable through the search method used. |
| AT 1950-01-01–1951-12-31 | Avalanche.report Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| AT 1950-01-01–2026-08-22 | Austrian Federal Safety Investigation Authority Aviation investigation authority | Official annual report index Language: de-en | Partial | 23/08/2026 | Wave 2; ledger incident-coverage-2026-08. Tracked source gap: https://github.com/marcus-hgic/heliski-26/issues/140 Known limitation: Online annual aircraft reports are readily visible from 2001; earlier reports require an authority request. Known limitation: No structured heli-ski activity field is available. |
| AT 1952-01-01–1956-12-31 | Austrian Federal Safety Investigation Authority Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| AT 1952-01-01–1956-12-31 | Avalanche.report Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| AT 1957-01-01–1961-12-31 | Avalanche.report Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| AT 1957-01-01–1961-12-31 | Austrian Federal Safety Investigation Authority Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| AT 1962-01-01–1966-12-31 | Avalanche.report Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| AT 1962-01-01–1966-12-31 | Austrian Federal Safety Investigation Authority Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| AT 1967-01-01–1971-12-31 | Austrian Federal Safety Investigation Authority Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| AT 1967-01-01–1971-12-31 | Avalanche.report Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| AT 1972-01-01–1976-12-31 | Avalanche.report Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| AT 1972-01-01–1976-12-31 | Austrian Federal Safety Investigation Authority Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| AT 1977-01-01–1981-12-31 | Austrian Federal Safety Investigation Authority Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| AT 1977-01-01–1981-12-31 | Avalanche.report Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| AT 1982-01-01–1986-12-31 | Austrian Federal Safety Investigation Authority Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| AT 1982-01-01–1986-12-31 | Avalanche.report Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| AT 1987-01-01–1991-12-31 | Austrian Federal Safety Investigation Authority Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| AT 1987-01-01–1991-12-31 | Avalanche.report Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| AT 1992-01-01–1996-12-31 | Avalanche.report Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| AT 1992-01-01–1996-12-31 | Austrian Federal Safety Investigation Authority Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| AT 1997-01-01–2001-12-31 | Austrian Federal Safety Investigation Authority Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| AT 1997-01-01–2001-12-31 | Avalanche.report Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| AT 2002-01-01–2006-12-31 | Austrian Federal Safety Investigation Authority Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| AT 2002-01-01–2006-12-31 | Avalanche.report Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| AT 2007-01-01–2011-12-31 | Austrian Federal Safety Investigation Authority Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| AT 2007-01-01–2011-12-31 | Avalanche.report Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| AT 2012-01-01–2016-12-31 | Avalanche.report Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| AT 2012-01-01–2016-12-31 | Austrian Federal Safety Investigation Authority Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| AT 2017-01-01–2021-12-31 | Avalanche.report Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| AT 2017-01-01–2021-12-31 | Austrian Federal Safety Investigation Authority Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| AT 2022-01-01–2026-08-31 | Austrian Federal Safety Investigation Authority Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| AT 2022-01-01–2026-08-31 | Avalanche.report Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| CA 1950-01-01–1951-12-31 | Avalanche Canada Incident Archive Avalanche authority | Mechanized skiing fatalities Language: en | Substantial | 09/09/2026 | Every record in the named public fatal-incident index was checked for the configured Canadian period. Explicit heli-ski wording creates a probable lead; ambiguous mechanized records remain uncertain and explicit cat-ski records are excluded. |
| CA 1950-01-01–1951-12-31 | Parks Canada Mountain Safety Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA 1950-01-01–2026-08-22 | Transportation Safety Board of Canada Aviation investigation authority | Official dataset and report index Language: en-fr | Partial | 23/08/2026 | Wave 1; ledger incident-coverage-2026-08. Tracked source gap: https://github.com/marcus-hgic/heliski-26/issues/129 Known limitation: No digital TSB occurrence was found for 1950–1980. Known limitation: The occurrence dataset has no reliable heli-ski activity field; the saved exact-narrative and confirmed-alias classifier is the reproducible boundary. |
| CA 1952-01-01–1956-12-31 | Transportation Safety Board of Canada Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA 1952-01-01–1956-12-31 | Parks Canada Mountain Safety Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA 1952-01-01–1956-12-31 | Avalanche Canada Incident Archive Avalanche authority | Mechanized skiing fatalities Language: en | Substantial | 09/09/2026 | Every record in the named public fatal-incident index was checked for the configured Canadian period. Explicit heli-ski wording creates a probable lead; ambiguous mechanized records remain uncertain and explicit cat-ski records are excluded. |
| CA 1957-01-01–1961-12-31 | Transportation Safety Board of Canada Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA 1957-01-01–1961-12-31 | Parks Canada Mountain Safety Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA 1957-01-01–1961-12-31 | Avalanche Canada Incident Archive Avalanche authority | Mechanized skiing fatalities Language: en | Substantial | 09/09/2026 | Every record in the named public fatal-incident index was checked for the configured Canadian period. Explicit heli-ski wording creates a probable lead; ambiguous mechanized records remain uncertain and explicit cat-ski records are excluded. |
| CA 1962-01-01–1966-12-31 | Parks Canada Mountain Safety Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA 1962-01-01–1966-12-31 | Avalanche Canada Incident Archive Avalanche authority | Mechanized skiing fatalities Language: en | Substantial | 09/09/2026 | Every record in the named public fatal-incident index was checked for the configured Canadian period. Explicit heli-ski wording creates a probable lead; ambiguous mechanized records remain uncertain and explicit cat-ski records are excluded. |
| CA 1962-01-01–1966-12-31 | Transportation Safety Board of Canada Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA 1967-01-01–1971-12-31 | Transportation Safety Board of Canada Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA 1967-01-01–1971-12-31 | Parks Canada Mountain Safety Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA 1967-01-01–1971-12-31 | Avalanche Canada Incident Archive Avalanche authority | Mechanized skiing fatalities Language: en | Substantial | 09/09/2026 | Every record in the named public fatal-incident index was checked for the configured Canadian period. Explicit heli-ski wording creates a probable lead; ambiguous mechanized records remain uncertain and explicit cat-ski records are excluded. |
| CA 1972-01-01–1976-12-31 | Parks Canada Mountain Safety Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA 1972-01-01–1976-12-31 | Transportation Safety Board of Canada Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA 1972-01-01–1976-12-31 | Avalanche Canada Incident Archive Avalanche authority | Mechanized skiing fatalities Language: en | Substantial | 09/09/2026 | Every record in the named public fatal-incident index was checked for the configured Canadian period. Explicit heli-ski wording creates a probable lead; ambiguous mechanized records remain uncertain and explicit cat-ski records are excluded. |
| CA 1977-01-01–1981-12-31 | Transportation Safety Board of Canada Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA 1977-01-01–1981-12-31 | Avalanche Canada Incident Archive Avalanche authority | Mechanized skiing fatalities Language: en | Substantial | 09/09/2026 | Every record in the named public fatal-incident index was checked for the configured Canadian period. Explicit heli-ski wording creates a probable lead; ambiguous mechanized records remain uncertain and explicit cat-ski records are excluded. |
| CA 1977-01-01–1981-12-31 | Parks Canada Mountain Safety Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA 1982-01-01–1986-12-31 | Parks Canada Mountain Safety Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA 1982-01-01–1986-12-31 | Transportation Safety Board of Canada Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA 1982-01-01–1986-12-31 | Avalanche Canada Incident Archive Avalanche authority | Mechanized skiing fatalities Language: en | Substantial | 09/09/2026 | Every record in the named public fatal-incident index was checked for the configured Canadian period. Explicit heli-ski wording creates a probable lead; ambiguous mechanized records remain uncertain and explicit cat-ski records are excluded. |
| CA 1987-01-01–1991-12-31 | Avalanche Canada Incident Archive Avalanche authority | Mechanized skiing fatalities Language: en | Substantial | 09/09/2026 | Every record in the named public fatal-incident index was checked for the configured Canadian period. Explicit heli-ski wording creates a probable lead; ambiguous mechanized records remain uncertain and explicit cat-ski records are excluded. |
| CA 1987-01-01–1991-12-31 | Transportation Safety Board of Canada Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA 1987-01-01–1991-12-31 | Parks Canada Mountain Safety Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA 1992-01-01–1996-12-31 | Parks Canada Mountain Safety Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA 1992-01-01–1996-12-31 | Avalanche Canada Incident Archive Avalanche authority | Mechanized skiing fatalities Language: en | Substantial | 09/09/2026 | Every record in the named public fatal-incident index was checked for the configured Canadian period. Explicit heli-ski wording creates a probable lead; ambiguous mechanized records remain uncertain and explicit cat-ski records are excluded. |
| CA 1992-01-01–1996-12-31 | Transportation Safety Board of Canada Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA 1997-01-01–2001-12-31 | Transportation Safety Board of Canada Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA 1997-01-01–2001-12-31 | Parks Canada Mountain Safety Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA 1997-01-01–2001-12-31 | Avalanche Canada Incident Archive Avalanche authority | Mechanized skiing fatalities Language: en | Substantial | 09/09/2026 | Every record in the named public fatal-incident index was checked for the configured Canadian period. Explicit heli-ski wording creates a probable lead; ambiguous mechanized records remain uncertain and explicit cat-ski records are excluded. |
| CA 2002-01-01–2006-12-31 | Transportation Safety Board of Canada Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA 2002-01-01–2006-12-31 | Avalanche Canada Incident Archive Avalanche authority | Mechanized skiing fatalities Language: en | Substantial | 09/09/2026 | Every record in the named public fatal-incident index was checked for the configured Canadian period. Explicit heli-ski wording creates a probable lead; ambiguous mechanized records remain uncertain and explicit cat-ski records are excluded. |
| CA 2002-01-01–2006-12-31 | Parks Canada Mountain Safety Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA 2007-01-01–2011-12-31 | Avalanche Canada Incident Archive Avalanche authority | Mechanized skiing fatalities Language: en | Substantial | 09/09/2026 | Every record in the named public fatal-incident index was checked for the configured Canadian period. Explicit heli-ski wording creates a probable lead; ambiguous mechanized records remain uncertain and explicit cat-ski records are excluded. |
| CA 2007-01-01–2011-12-31 | Parks Canada Mountain Safety Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA 2007-01-01–2011-12-31 | Transportation Safety Board of Canada Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA 2012-01-01–2016-12-31 | Transportation Safety Board of Canada Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA 2012-01-01–2016-12-31 | Parks Canada Mountain Safety Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA 2012-01-01–2016-12-31 | Avalanche Canada Incident Archive Avalanche authority | Mechanized skiing fatalities Language: en | Substantial | 09/09/2026 | Every record in the named public fatal-incident index was checked for the configured Canadian period. Explicit heli-ski wording creates a probable lead; ambiguous mechanized records remain uncertain and explicit cat-ski records are excluded. |
| CA 2017-01-01–2021-12-31 | Transportation Safety Board of Canada Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA 2017-01-01–2021-12-31 | Parks Canada Mountain Safety Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA 2017-01-01–2021-12-31 | Avalanche Canada Incident Archive Avalanche authority | Mechanized skiing fatalities Language: en | Substantial | 09/09/2026 | Every record in the named public fatal-incident index was checked for the configured Canadian period. Explicit heli-ski wording creates a probable lead; ambiguous mechanized records remain uncertain and explicit cat-ski records are excluded. |
| CA 2022-01-01–2026-08-31 | Parks Canada Mountain Safety Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA 2022-01-01–2026-08-31 | Transportation Safety Board of Canada Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA 2022-01-01–2026-08-31 | Avalanche Canada Incident Archive Avalanche authority | Mechanized skiing fatalities Language: en | Substantial | 09/09/2026 | Every record in the named public fatal-incident index was checked for the configured Canadian period. Explicit heli-ski wording creates a probable lead; ambiguous mechanized records remain uncertain and explicit cat-ski records are excluded. |
| CA-BC 1950-01-01–1951-12-31 | BC Coroners Service Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 1950-01-01–1951-12-31 | WorkSafeBC Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 1950-01-01–1951-12-31 | British Columbia RCMP Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 1952-01-01–1956-12-31 | WorkSafeBC Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 1952-01-01–1956-12-31 | BC Coroners Service Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 1952-01-01–1956-12-31 | British Columbia RCMP Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 1957-01-01–1961-12-31 | BC Coroners Service Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 1957-01-01–1961-12-31 | British Columbia RCMP Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 1957-01-01–1961-12-31 | WorkSafeBC Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 1962-01-01–1966-12-31 | WorkSafeBC Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 1962-01-01–1966-12-31 | BC Coroners Service Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 1962-01-01–1966-12-31 | British Columbia RCMP Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 1967-01-01–1971-12-31 | WorkSafeBC Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 1967-01-01–1971-12-31 | BC Coroners Service Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 1967-01-01–1971-12-31 | British Columbia RCMP Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 1972-01-01–1976-12-31 | British Columbia RCMP Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 1972-01-01–1976-12-31 | WorkSafeBC Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 1972-01-01–1976-12-31 | BC Coroners Service Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 1977-01-01–1981-12-31 | British Columbia RCMP Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 1977-01-01–1981-12-31 | BC Coroners Service Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 1977-01-01–1981-12-31 | WorkSafeBC Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 1982-01-01–1986-12-31 | BC Coroners Service Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 1982-01-01–1986-12-31 | British Columbia RCMP Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 1982-01-01–1986-12-31 | WorkSafeBC Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 1987-01-01–1991-12-31 | British Columbia RCMP Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 1987-01-01–1991-12-31 | WorkSafeBC Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 1987-01-01–1991-12-31 | BC Coroners Service Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 1992-01-01–1996-12-31 | WorkSafeBC Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 1992-01-01–1996-12-31 | British Columbia RCMP Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 1992-01-01–1996-12-31 | BC Coroners Service Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 1997-01-01–2001-12-31 | BC Coroners Service Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 1997-01-01–2001-12-31 | British Columbia RCMP Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 1997-01-01–2001-12-31 | WorkSafeBC Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 2002-01-01–2006-12-31 | WorkSafeBC Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 2002-01-01–2006-12-31 | British Columbia RCMP Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 2002-01-01–2006-12-31 | BC Coroners Service Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 2007-01-01–2011-12-31 | WorkSafeBC Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 2007-01-01–2011-12-31 | British Columbia RCMP Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 2007-01-01–2011-12-31 | BC Coroners Service Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 2012-01-01–2016-12-31 | BC Coroners Service Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 2012-01-01–2016-12-31 | WorkSafeBC Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 2012-01-01–2016-12-31 | British Columbia RCMP Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 2017-01-01–2021-12-31 | WorkSafeBC Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 2017-01-01–2021-12-31 | British Columbia RCMP Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 2017-01-01–2021-12-31 | BC Coroners Service Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 2022-01-01–2026-08-31 | British Columbia RCMP Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 2022-01-01–2026-08-31 | BC Coroners Service Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| CA-BC 2022-01-01–2026-08-31 | WorkSafeBC Authority | Operator location and incident terms Language: en | Partial | 11/09/2026 | The named primary source, WorkSafeBC, was searched directly with web_search using heli-ski, heli ski, fatal incident, serious incident, mechanized skiing, avalanche, and related combinations for the requested period of 2022-01-01 through 2026-08-31. The search located a WorkSafeBC avalanche-hazard notice published on March 23, 2026, but no incident-specific WorkSafeBC investigation record clearly identifying a qualifying commercial heli-ski incident. Additional searches of authoritative or independent sources located four potentially qualifying British Columbia avalanche incidents. Coverage is partial because ordinary web search does not establish an exhaustive search of WorkSafeBC's full incident-notice or claims data, and the accessible Avalanche Canada historical index could not be fully enumerated or independently verified record by record during this run. |
| CENTRAL_ASIA — Kazakhstan, Kyrgyzstan, Tajikistan, Uzbekistan 1950-01-01–2026-08-22 | IFMGA Professional association market discovery | Multilingual market and operator discovery Language: en-ru-local | Source unavailable | Not yet successful | Wave 3; ledger incident-coverage-2026-08. Tracked source gap: https://github.com/marcus-hgic/heliski-26/issues/143 Known limitation: No single authoritative cross-border aviation or avalanche incident source exists for the region. Known limitation: Country-level authorities, local-language query packs and confirmed operator aliases are required. |
| CH 1950-01-01–2026-08-22 | Swiss Transportation Safety Investigation Board Aviation investigation authority | Official report search Language: de-fr-it-en | Partial | 23/08/2026 | Wave 2; ledger incident-coverage-2026-08. Tracked source gap: https://github.com/marcus-hgic/heliski-26/issues/131 Known limitation: 1950–1958 is outside the stated digital archive. Known limitation: Activity is not consistently structured and requires report-text classification. |
| CH 1950-01-01–2026-08-22 | WSL Institute for Snow and Avalanche Research SLF Avalanche research authority | Official dataset inventory Language: de-fr-it-en | Partial | 23/08/2026 | Wave 2; ledger incident-coverage-2026-08. Tracked source gap: https://github.com/marcus-hgic/heliski-26/issues/131 Known limitation: The free public datasets do not expose all detailed fields needed to classify heli-ski activity. Known limitation: A detailed extract may require an SLF data request and licence review. |
| CH 1952-01-01–1956-12-31 | WSL Institute for Snow and Avalanche Research SLF Research | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| CH 1952-01-01–1956-12-31 | Swiss Transportation Safety Investigation Board Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| CH 1957-01-01–1961-12-31 | Swiss Transportation Safety Investigation Board Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| CH 1957-01-01–1961-12-31 | WSL Institute for Snow and Avalanche Research SLF Research | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| CH 1962-01-01–1966-12-31 | Swiss Transportation Safety Investigation Board Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| CH 1962-01-01–1966-12-31 | WSL Institute for Snow and Avalanche Research SLF Research | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| CH 1967-01-01–1971-12-31 | WSL Institute for Snow and Avalanche Research SLF Research | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| CH 1967-01-01–1971-12-31 | Swiss Transportation Safety Investigation Board Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| CH 1972-01-01–1976-12-31 | WSL Institute for Snow and Avalanche Research SLF Research | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| CH 1972-01-01–1976-12-31 | Swiss Transportation Safety Investigation Board Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| CH 1977-01-01–1981-12-31 | WSL Institute for Snow and Avalanche Research SLF Research | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| CH 1977-01-01–1981-12-31 | Swiss Transportation Safety Investigation Board Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| CH 1982-01-01–1986-12-31 | WSL Institute for Snow and Avalanche Research SLF Research | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| CH 1982-01-01–1986-12-31 | Swiss Transportation Safety Investigation Board Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| CH 1987-01-01–1991-12-31 | Swiss Transportation Safety Investigation Board Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| CH 1987-01-01–1991-12-31 | WSL Institute for Snow and Avalanche Research SLF Research | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| CH 1992-01-01–1996-12-31 | WSL Institute for Snow and Avalanche Research SLF Research | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| CH 1992-01-01–1996-12-31 | Swiss Transportation Safety Investigation Board Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| CH 1997-01-01–2001-12-31 | WSL Institute for Snow and Avalanche Research SLF Research | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| CH 1997-01-01–2001-12-31 | Swiss Transportation Safety Investigation Board Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| CH 2002-01-01–2006-12-31 | WSL Institute for Snow and Avalanche Research SLF Research | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| CH 2002-01-01–2006-12-31 | Swiss Transportation Safety Investigation Board Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| CH 2007-01-01–2011-12-31 | Swiss Transportation Safety Investigation Board Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| CH 2007-01-01–2011-12-31 | WSL Institute for Snow and Avalanche Research SLF Research | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| CH 2012-01-01–2016-12-31 | WSL Institute for Snow and Avalanche Research SLF Research | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| CH 2012-01-01–2016-12-31 | Swiss Transportation Safety Investigation Board Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| CH 2017-01-01–2021-12-31 | WSL Institute for Snow and Avalanche Research SLF Research | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| CH 2017-01-01–2021-12-31 | Swiss Transportation Safety Investigation Board Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| CH 2022-01-01–2026-08-31 | Swiss Transportation Safety Investigation Board Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| CH 2022-01-01–2026-08-31 | WSL Institute for Snow and Avalanche Research SLF Research | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| CL 1950-01-01–2026-08-22 | DGAC Chile Accident Investigation Aviation investigation authority | Official annual report index Language: es | Partial | 23/08/2026 | Wave 3; ledger incident-coverage-2026-08. Tracked source gap: https://github.com/marcus-hgic/heliski-26/issues/138 Known limitation: The visible final-report years include 1991 and 2004 onward, leaving a documented 1992–2003 web-archive gap and no 1950–1990 enumeration. Known limitation: Missing reports require a transparency request. |
| CL 1952-01-01–1956-12-31 | DGAC Chile Accident Investigation Authority | Operator location and incident terms Language: es | Not yet reviewed | Not yet successful | None recorded |
| CL 1957-01-01–1961-12-31 | DGAC Chile Accident Investigation Authority | Operator location and incident terms Language: es | Not yet reviewed | Not yet successful | None recorded |
| CL 1962-01-01–1966-12-31 | DGAC Chile Accident Investigation Authority | Operator location and incident terms Language: es | Not yet reviewed | Not yet successful | None recorded |
| CL 1967-01-01–1971-12-31 | DGAC Chile Accident Investigation Authority | Operator location and incident terms Language: es | Not yet reviewed | Not yet successful | None recorded |
| CL 1972-01-01–1976-12-31 | DGAC Chile Accident Investigation Authority | Operator location and incident terms Language: es | Not yet reviewed | Not yet successful | None recorded |
| CL 1977-01-01–1981-12-31 | DGAC Chile Accident Investigation Authority | Operator location and incident terms Language: es | Not yet reviewed | Not yet successful | None recorded |
| CL 1982-01-01–1986-12-31 | DGAC Chile Accident Investigation Authority | Operator location and incident terms Language: es | Not yet reviewed | Not yet successful | None recorded |
| CL 1987-01-01–1991-12-31 | DGAC Chile Accident Investigation Authority | Operator location and incident terms Language: es | Not yet reviewed | Not yet successful | None recorded |
| CL 1992-01-01–1996-12-31 | DGAC Chile Accident Investigation Authority | Operator location and incident terms Language: es | Not yet reviewed | Not yet successful | None recorded |
| CL 1997-01-01–2001-12-31 | DGAC Chile Accident Investigation Authority | Operator location and incident terms Language: es | Not yet reviewed | Not yet successful | None recorded |
| CL 2002-01-01–2006-12-31 | DGAC Chile Accident Investigation Authority | Operator location and incident terms Language: es | Not yet reviewed | Not yet successful | None recorded |
| CL 2007-01-01–2011-12-31 | DGAC Chile Accident Investigation Authority | Operator location and incident terms Language: es | Not yet reviewed | Not yet successful | None recorded |
| CL 2012-01-01–2016-12-31 | DGAC Chile Accident Investigation Authority | Operator location and incident terms Language: es | Not yet reviewed | Not yet successful | None recorded |
| CL 2017-01-01–2021-12-31 | DGAC Chile Accident Investigation Authority | Operator location and incident terms Language: es | Not yet reviewed | Not yet successful | None recorded |
| CL 2022-01-01–2026-08-31 | DGAC Chile Accident Investigation Authority | Operator location and incident terms Language: es | Not yet reviewed | Not yet successful | None recorded |
| DK 1950-01-01–1951-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| DK 1950-01-01–1951-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| DK 1952-01-01–1956-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| DK 1952-01-01–1956-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| DK 1957-01-01–1961-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| DK 1957-01-01–1961-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| DK 1962-01-01–1966-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| DK 1962-01-01–1966-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| DK 1967-01-01–1971-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| DK 1967-01-01–1971-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| DK 1972-01-01–1976-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| DK 1972-01-01–1976-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| DK 1977-01-01–1981-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| DK 1977-01-01–1981-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| DK 1982-01-01–1986-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| DK 1982-01-01–1986-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| DK 1987-01-01–1991-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| DK 1987-01-01–1991-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| DK 1992-01-01–1996-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| DK 1992-01-01–1996-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| DK 1997-01-01–2001-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| DK 1997-01-01–2001-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| DK 2002-01-01–2006-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| DK 2002-01-01–2006-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| DK 2007-01-01–2011-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| DK 2007-01-01–2011-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| DK 2012-01-01–2016-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| DK 2012-01-01–2016-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| DK 2017-01-01–2021-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| DK 2017-01-01–2021-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| DK 2022-01-01–2026-08-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| DK 2022-01-01–2026-08-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Partial | 26/08/2026 | The named Accident Investigation Board Denmark source was searched directly for the supplied terms and related Greenland/helicopter combinations, and the available aviation index pages for 2022 through 2026 were reviewed through ordinary web search. The source archive exposes searchable and paginated web indexes, but this run did not enumerate a bounded, complete official dataset for every record in the interval. No qualifying commercial heli-skiing, heli-boarding or heli-assisted-touring incident was established in the AIB Denmark material reviewed. Two Canadian avalanche records were retained after independent follow-up because they were identified in authoritative avalanche records as mechanized-skiing incidents; one was additionally tied by independent reporting to a commercial heli-ski operator. |
| FO 1950-01-01–1951-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| FO 1950-01-01–1951-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| FO 1952-01-01–1956-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| FO 1952-01-01–1956-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| FO 1957-01-01–1961-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| FO 1957-01-01–1961-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| FO 1962-01-01–1966-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| FO 1962-01-01–1966-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| FO 1967-01-01–1971-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| FO 1967-01-01–1971-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| FO 1972-01-01–1976-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| FO 1972-01-01–1976-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| FO 1977-01-01–1981-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| FO 1977-01-01–1981-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| FO 1982-01-01–1986-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| FO 1982-01-01–1986-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| FO 1987-01-01–1991-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| FO 1987-01-01–1991-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| FO 1992-01-01–1996-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| FO 1992-01-01–1996-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| FO 1997-01-01–2001-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| FO 1997-01-01–2001-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| FO 2002-01-01–2006-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| FO 2002-01-01–2006-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| FO 2007-01-01–2011-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| FO 2007-01-01–2011-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| FO 2012-01-01–2016-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| FO 2012-01-01–2016-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| FO 2017-01-01–2021-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| FO 2017-01-01–2021-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| FO 2022-01-01–2026-08-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Partial | 25/08/2026 | The named Accident Investigation Board Denmark aviation archive was searched directly using the supplied English and Danish/Greenlandic terms, together with year-specific archive searches for 2022, 2023, 2024, 2025 and 2026. Additional searches covered Avalanche Canada’s historical incident index and independent reporting for scope and identity. The search identified two Canadian mechanized-skiing avalanche records that may be relevant but do not establish commercial heli-skiing or heli-assisted touring, plus one Greenland helicopter occurrence that is clearly unrelated to heli-skiing. The run did not enumerate a bounded, complete official dataset for the entire interval; therefore no zero-incident conclusion is drawn. |
| FO 2022-01-01–2026-08-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| FR 1950-01-01–2026-08-22 | BEA France Aviation investigation authority | Official report database Language: fr-en | Partial | 23/08/2026 | Wave 2; ledger incident-coverage-2026-08. Tracked source gap: https://github.com/marcus-hgic/heliski-26/issues/139 Known limitation: The public interface does not provide a heli-ski activity field or a bounded bulk export. Known limitation: Two pilot leads remained duplicate or unresolved and were not publishable. |
| FR 1950-01-01–2026-08-22 | ANENA Avalanche research authority | Official raw dataset inventory Language: fr | Partial | 23/08/2026 | Wave 2; ledger incident-coverage-2026-08. Tracked source gap: https://github.com/marcus-hgic/heliski-26/issues/139 Known limitation: Paper archives begin in 1969/70 and digital entry in 1999; only fatal accidents were systematically recorded before 1999. Known limitation: The published workbook ends in 2023 and needs activity classification. |
| FR 1952-01-01–1956-12-31 | BEA France Authority | Operator location and incident terms Language: fr | Not yet reviewed | Not yet successful | None recorded |
| FR 1952-01-01–1956-12-31 | ANENA Research | Operator location and incident terms Language: fr | Not yet reviewed | Not yet successful | None recorded |
| FR 1957-01-01–1961-12-31 | ANENA Research | Operator location and incident terms Language: fr | Not yet reviewed | Not yet successful | None recorded |
| FR 1957-01-01–1961-12-31 | BEA France Authority | Operator location and incident terms Language: fr | Not yet reviewed | Not yet successful | None recorded |
| FR 1962-01-01–1966-12-31 | ANENA Research | Operator location and incident terms Language: fr | Not yet reviewed | Not yet successful | None recorded |
| FR 1962-01-01–1966-12-31 | BEA France Authority | Operator location and incident terms Language: fr | Not yet reviewed | Not yet successful | None recorded |
| FR 1967-01-01–1971-12-31 | ANENA Research | Operator location and incident terms Language: fr | Not yet reviewed | Not yet successful | None recorded |
| FR 1967-01-01–1971-12-31 | BEA France Authority | Operator location and incident terms Language: fr | Not yet reviewed | Not yet successful | None recorded |
| FR 1972-01-01–1976-12-31 | BEA France Authority | Operator location and incident terms Language: fr | Not yet reviewed | Not yet successful | None recorded |
| FR 1972-01-01–1976-12-31 | ANENA Research | Operator location and incident terms Language: fr | Not yet reviewed | Not yet successful | None recorded |
| FR 1977-01-01–1981-12-31 | ANENA Research | Operator location and incident terms Language: fr | Not yet reviewed | Not yet successful | None recorded |
| FR 1977-01-01–1981-12-31 | BEA France Authority | Operator location and incident terms Language: fr | Not yet reviewed | Not yet successful | None recorded |
| FR 1982-01-01–1986-12-31 | BEA France Authority | Operator location and incident terms Language: fr | Not yet reviewed | Not yet successful | None recorded |
| FR 1982-01-01–1986-12-31 | ANENA Research | Operator location and incident terms Language: fr | Not yet reviewed | Not yet successful | None recorded |
| FR 1987-01-01–1991-12-31 | BEA France Authority | Operator location and incident terms Language: fr | Not yet reviewed | Not yet successful | None recorded |
| FR 1987-01-01–1991-12-31 | ANENA Research | Operator location and incident terms Language: fr | Not yet reviewed | Not yet successful | None recorded |
| FR 1992-01-01–1996-12-31 | BEA France Authority | Operator location and incident terms Language: fr | Not yet reviewed | Not yet successful | None recorded |
| FR 1992-01-01–1996-12-31 | ANENA Research | Operator location and incident terms Language: fr | Not yet reviewed | Not yet successful | None recorded |
| FR 1997-01-01–2001-12-31 | BEA France Authority | Operator location and incident terms Language: fr | Not yet reviewed | Not yet successful | None recorded |
| FR 1997-01-01–2001-12-31 | ANENA Research | Operator location and incident terms Language: fr | Not yet reviewed | Not yet successful | None recorded |
| FR 2002-01-01–2006-12-31 | ANENA Research | Operator location and incident terms Language: fr | Not yet reviewed | Not yet successful | None recorded |
| FR 2002-01-01–2006-12-31 | BEA France Authority | Operator location and incident terms Language: fr | Not yet reviewed | Not yet successful | None recorded |
| FR 2007-01-01–2011-12-31 | ANENA Research | Operator location and incident terms Language: fr | Not yet reviewed | Not yet successful | None recorded |
| FR 2007-01-01–2011-12-31 | BEA France Authority | Operator location and incident terms Language: fr | Not yet reviewed | Not yet successful | None recorded |
| FR 2012-01-01–2016-12-31 | BEA France Authority | Operator location and incident terms Language: fr | Not yet reviewed | Not yet successful | None recorded |
| FR 2012-01-01–2016-12-31 | ANENA Research | Operator location and incident terms Language: fr | Not yet reviewed | Not yet successful | None recorded |
| FR 2017-01-01–2021-12-31 | ANENA Research | Operator location and incident terms Language: fr | Not yet reviewed | Not yet successful | None recorded |
| FR 2017-01-01–2021-12-31 | BEA France Authority | Operator location and incident terms Language: fr | Not yet reviewed | Not yet successful | None recorded |
| FR 2022-01-01–2026-08-31 | ANENA Research | Operator location and incident terms Language: fr | Partial | 29/08/2026 | The named source, ANENA, was searched directly using the requested French terms and its accident archive pages, annual avalanche-bulletin PDFs, current 2025-2026 accident table, and indexed archive references. The search identified no clearly qualifying commercial heli-ski, heli-boarding, or heli-assisted touring incident occurring in France between 2022-01-01 and 2026-07-31. Three relevant commercial heli-ski incidents in neighbouring Italy or Switzerland were preserved as out_of_scope because the registered source jurisdiction for this run is France. This is not an exhaustive negative finding: ordinary web search was used, ANENA's 2024-2025 spreadsheet and 2020-2023 spreadsheet could not be inspected through the available method, and the archive was not enumerated as a complete bounded record set. |
| FR 2022-01-01–2026-08-31 | BEA France Authority | Operator location and incident terms Language: fr | Not yet reviewed | Not yet successful | None recorded |
| GE — Caucasus 1950-01-01–2026-08-22 | Georgia Civil Aviation Accident Investigation Aviation regulator authority | Official site search Language: ka-en | Source unavailable | Not yet successful | Wave 3; ledger incident-coverage-2026-08. Tracked source gap: https://github.com/marcus-hgic/heliski-26/issues/137 Known limitation: The regulator site is not a demonstrated complete accident-investigation archive. Known limitation: The responsible Ministry investigation bureau and historical report access must be confirmed. |
| GE 1952-01-01–1956-12-31 | Georgia Civil Aviation Accident Investigation Authority | Operator location and incident terms Language: ka | Not yet reviewed | Not yet successful | None recorded |
| GE 1957-01-01–1961-12-31 | Georgia Civil Aviation Accident Investigation Authority | Operator location and incident terms Language: ka | Not yet reviewed | Not yet successful | None recorded |
| GE 1962-01-01–1966-12-31 | Georgia Civil Aviation Accident Investigation Authority | Operator location and incident terms Language: ka | Not yet reviewed | Not yet successful | None recorded |
| GE 1967-01-01–1971-12-31 | Georgia Civil Aviation Accident Investigation Authority | Operator location and incident terms Language: ka | Not yet reviewed | Not yet successful | None recorded |
| GE 1972-01-01–1976-12-31 | Georgia Civil Aviation Accident Investigation Authority | Operator location and incident terms Language: ka | Not yet reviewed | Not yet successful | None recorded |
| GE 1977-01-01–1981-12-31 | Georgia Civil Aviation Accident Investigation Authority | Operator location and incident terms Language: ka | Not yet reviewed | Not yet successful | None recorded |
| GE 1982-01-01–1986-12-31 | Georgia Civil Aviation Accident Investigation Authority | Operator location and incident terms Language: ka | Not yet reviewed | Not yet successful | None recorded |
| GE 1987-01-01–1991-12-31 | Georgia Civil Aviation Accident Investigation Authority | Operator location and incident terms Language: ka | Not yet reviewed | Not yet successful | None recorded |
| GE 1992-01-01–1996-12-31 | Georgia Civil Aviation Accident Investigation Authority | Operator location and incident terms Language: ka | Not yet reviewed | Not yet successful | None recorded |
| GE 1997-01-01–2001-12-31 | Georgia Civil Aviation Accident Investigation Authority | Operator location and incident terms Language: ka | Not yet reviewed | Not yet successful | None recorded |
| GE 2002-01-01–2006-12-31 | Georgia Civil Aviation Accident Investigation Authority | Operator location and incident terms Language: ka | Not yet reviewed | Not yet successful | None recorded |
| GE 2007-01-01–2011-12-31 | Georgia Civil Aviation Accident Investigation Authority | Operator location and incident terms Language: ka | Not yet reviewed | Not yet successful | None recorded |
| GE 2012-01-01–2016-12-31 | Georgia Civil Aviation Accident Investigation Authority | Operator location and incident terms Language: ka | Not yet reviewed | Not yet successful | None recorded |
| GE 2017-01-01–2021-12-31 | Georgia Civil Aviation Accident Investigation Authority | Operator location and incident terms Language: ka | Not yet reviewed | Not yet successful | None recorded |
| GE 2022-01-01–2026-08-31 | Georgia Civil Aviation Accident Investigation Authority | Operator location and incident terms Language: ka | Not yet reviewed | Not yet successful | None recorded |
| GL 1950-01-01–2026-08-22 | Danish Accident Investigation Board Aviation Aviation investigation authority | Official report site search Language: da-en | Partial | 23/08/2026 | Wave 3; ledger incident-coverage-2026-08. Tracked source gap: https://github.com/marcus-hgic/heliski-26/issues/142 Known limitation: No bounded Greenland-specific historical bulk export or heli-ski classification was identified. Known limitation: Greenland police and local authority sources require separate reconciliation. |
| GL 1950-01-01–1951-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| GL 1952-01-01–1956-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| GL 1952-01-01–1956-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| GL 1957-01-01–1961-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| GL 1957-01-01–1961-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| GL 1962-01-01–1966-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| GL 1962-01-01–1966-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| GL 1967-01-01–1971-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| GL 1967-01-01–1971-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| GL 1972-01-01–1976-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| GL 1972-01-01–1976-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| GL 1977-01-01–1981-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| GL 1977-01-01–1981-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| GL 1982-01-01–1986-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| GL 1982-01-01–1986-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| GL 1987-01-01–1991-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| GL 1987-01-01–1991-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| GL 1992-01-01–1996-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| GL 1992-01-01–1996-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| GL 1997-01-01–2001-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| GL 1997-01-01–2001-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| GL 2002-01-01–2006-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| GL 2002-01-01–2006-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| GL 2007-01-01–2011-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| GL 2007-01-01–2011-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| GL 2012-01-01–2016-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| GL 2012-01-01–2016-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| GL 2017-01-01–2021-12-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| GL 2017-01-01–2021-12-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| GL 2022-01-01–2026-08-31 | Accident Investigation Board Denmark Authority | Operator location and incident terms Language: da | Partial | 24/08/2026 | The named Accident Investigation Board Denmark source was searched directly using the requested English and Danish/Greenlandic terms, and its aviation investigation-result pages for the relevant period were reviewed through ordinary web search. The search identified no record establishing a commercial heli-skiing, heli-boarding or heli-assisted-touring incident in Greenland between January 1, 2022 and July 31, 2026. This is a partial-coverage result, not evidence that no such incident occurred. |
| GL 2022-01-01–2026-08-31 | Danish Accident Investigation Board Aviation Authority | Operator location and incident terms Language: da | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1950-01-01–1951-12-31 | NOAA National Centers for Environmental Information Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1950-01-01–1951-12-31 | U.S. Department of State Travel Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1950-01-01–1951-12-31 | CDC Travelers Health Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL — Market discovery 1950-01-01–2026-08-22 | IFMGA Professional association market discovery | Global market and operator discovery Language: en-multilingual | Partial | 23/08/2026 | Wave 3; ledger incident-coverage-2026-08. Tracked source gap: https://github.com/marcus-hgic/heliski-26/issues/144 Known limitation: Market discovery is not an incident enumeration and cannot establish zero incidents. Known limitation: Operator aliases remain empty until confirmed by authoritative or operator sources. |
| GLOBAL 1950-01-01–1951-12-31 | International Snow Science Workshop Research | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1952-01-01–1956-12-31 | CDC Travelers Health Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1952-01-01–1956-12-31 | International Snow Science Workshop Research | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1952-01-01–1956-12-31 | U.S. Department of State Travel Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1952-01-01–1956-12-31 | NOAA National Centers for Environmental Information Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1957-01-01–1961-12-31 | U.S. Department of State Travel Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1957-01-01–1961-12-31 | International Snow Science Workshop Research | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1957-01-01–1961-12-31 | NOAA National Centers for Environmental Information Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1957-01-01–1961-12-31 | CDC Travelers Health Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1962-01-01–1966-12-31 | CDC Travelers Health Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1962-01-01–1966-12-31 | U.S. Department of State Travel Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1962-01-01–1966-12-31 | NOAA National Centers for Environmental Information Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1962-01-01–1966-12-31 | International Snow Science Workshop Research | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1967-01-01–1971-12-31 | U.S. Department of State Travel Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1967-01-01–1971-12-31 | NOAA National Centers for Environmental Information Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1967-01-01–1971-12-31 | CDC Travelers Health Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1967-01-01–1971-12-31 | International Snow Science Workshop Research | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1972-01-01–1976-12-31 | U.S. Department of State Travel Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1972-01-01–1976-12-31 | CDC Travelers Health Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1972-01-01–1976-12-31 | NOAA National Centers for Environmental Information Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1972-01-01–1976-12-31 | International Snow Science Workshop Research | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1977-01-01–1981-12-31 | CDC Travelers Health Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1977-01-01–1981-12-31 | U.S. Department of State Travel Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1977-01-01–1981-12-31 | NOAA National Centers for Environmental Information Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1977-01-01–1981-12-31 | International Snow Science Workshop Research | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1982-01-01–1986-12-31 | U.S. Department of State Travel Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1982-01-01–1986-12-31 | CDC Travelers Health Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1982-01-01–1986-12-31 | International Snow Science Workshop Research | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1982-01-01–1986-12-31 | NOAA National Centers for Environmental Information Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1987-01-01–1991-12-31 | NOAA National Centers for Environmental Information Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1987-01-01–1991-12-31 | U.S. Department of State Travel Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1987-01-01–1991-12-31 | CDC Travelers Health Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1987-01-01–1991-12-31 | International Snow Science Workshop Research | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1992-01-01–1996-12-31 | International Snow Science Workshop Research | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1992-01-01–1996-12-31 | CDC Travelers Health Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1992-01-01–1996-12-31 | NOAA National Centers for Environmental Information Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1992-01-01–1996-12-31 | U.S. Department of State Travel Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1997-01-01–2001-12-31 | NOAA National Centers for Environmental Information Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1997-01-01–2001-12-31 | U.S. Department of State Travel Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1997-01-01–2001-12-31 | CDC Travelers Health Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 1997-01-01–2001-12-31 | International Snow Science Workshop Research | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 2002-01-01–2006-12-31 | International Snow Science Workshop Research | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 2002-01-01–2006-12-31 | CDC Travelers Health Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 2002-01-01–2006-12-31 | NOAA National Centers for Environmental Information Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 2002-01-01–2006-12-31 | U.S. Department of State Travel Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 2007-01-01–2011-12-31 | CDC Travelers Health Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 2007-01-01–2011-12-31 | U.S. Department of State Travel Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 2007-01-01–2011-12-31 | NOAA National Centers for Environmental Information Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 2007-01-01–2011-12-31 | International Snow Science Workshop Research | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 2012-01-01–2016-12-31 | U.S. Department of State Travel Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 2012-01-01–2016-12-31 | International Snow Science Workshop Research | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 2012-01-01–2016-12-31 | CDC Travelers Health Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 2012-01-01–2016-12-31 | NOAA National Centers for Environmental Information Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 2017-01-01–2021-12-31 | International Snow Science Workshop Research | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 2017-01-01–2021-12-31 | U.S. Department of State Travel Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 2017-01-01–2021-12-31 | NOAA National Centers for Environmental Information Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 2017-01-01–2021-12-31 | CDC Travelers Health Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 2022-01-01–2026-08-31 | CDC Travelers Health Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 2022-01-01–2026-08-31 | NOAA National Centers for Environmental Information Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 2022-01-01–2026-08-31 | U.S. Department of State Travel Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| GLOBAL 2022-01-01–2026-08-31 | International Snow Science Workshop Research | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| IN — South Asia 1950-01-01–2026-08-22 | Aircraft Accident Investigation Bureau India Aviation investigation authority | Official report index Language: hi-en | Partial | 23/08/2026 | Wave 3; ledger incident-coverage-2026-08. Tracked source gap: https://github.com/marcus-hgic/heliski-26/issues/141 Known limitation: The report list has no heli-ski activity field or bounded historical export. Known limitation: Operator and geography aliases require full-report classification. |
| IN 1952-01-01–1956-12-31 | Aircraft Accident Investigation Bureau India Authority | Operator location and incident terms Language: hi | Not yet reviewed | Not yet successful | None recorded |
| IN 1957-01-01–1961-12-31 | Aircraft Accident Investigation Bureau India Authority | Operator location and incident terms Language: hi | Not yet reviewed | Not yet successful | None recorded |
| IN 1962-01-01–1966-12-31 | Aircraft Accident Investigation Bureau India Authority | Operator location and incident terms Language: hi | Not yet reviewed | Not yet successful | None recorded |
| IN 1967-01-01–1971-12-31 | Aircraft Accident Investigation Bureau India Authority | Operator location and incident terms Language: hi | Not yet reviewed | Not yet successful | None recorded |
| IN 1972-01-01–1976-12-31 | Aircraft Accident Investigation Bureau India Authority | Operator location and incident terms Language: hi | Not yet reviewed | Not yet successful | None recorded |
| IN 1977-01-01–1981-12-31 | Aircraft Accident Investigation Bureau India Authority | Operator location and incident terms Language: hi | Not yet reviewed | Not yet successful | None recorded |
| IN 1982-01-01–1986-12-31 | Aircraft Accident Investigation Bureau India Authority | Operator location and incident terms Language: hi | Not yet reviewed | Not yet successful | None recorded |
| IN 1987-01-01–1991-12-31 | Aircraft Accident Investigation Bureau India Authority | Operator location and incident terms Language: hi | Not yet reviewed | Not yet successful | None recorded |
| IN 1992-01-01–1996-12-31 | Aircraft Accident Investigation Bureau India Authority | Operator location and incident terms Language: hi | Not yet reviewed | Not yet successful | None recorded |
| IN 1997-01-01–2001-12-31 | Aircraft Accident Investigation Bureau India Authority | Operator location and incident terms Language: hi | Not yet reviewed | Not yet successful | None recorded |
| IN 2002-01-01–2006-12-31 | Aircraft Accident Investigation Bureau India Authority | Operator location and incident terms Language: hi | Not yet reviewed | Not yet successful | None recorded |
| IN 2007-01-01–2011-12-31 | Aircraft Accident Investigation Bureau India Authority | Operator location and incident terms Language: hi | Not yet reviewed | Not yet successful | None recorded |
| IN 2012-01-01–2016-12-31 | Aircraft Accident Investigation Bureau India Authority | Operator location and incident terms Language: hi | Not yet reviewed | Not yet successful | None recorded |
| IN 2017-01-01–2021-12-31 | Aircraft Accident Investigation Bureau India Authority | Operator location and incident terms Language: hi | Not yet reviewed | Not yet successful | None recorded |
| IN 2022-01-01–2026-08-31 | Aircraft Accident Investigation Bureau India Authority | Operator location and incident terms Language: hi | Partial | 28/08/2026 | The named Aircraft Accident Investigation Bureau (AAIB) source was searched directly. Its public “Occurrences investigated by AAIB” index was enumerated for records dated from 2022-01-01 through 2026-07-31: 39 indexed records were visible in the interval, comprising 28 accident entries and 11 serious-incident entries. None of the indexed titles identifies heli-skiing, heli-boarding or heli-assisted touring. Additional ordinary web searches were run for heli-skiing, helicopter accidents, Himachal Pradesh, Kashmir and Gulmarg. This is partial rather than complete coverage because the run used ordinary web search, the AAIB site does not expose a machine-readable bounded dataset for the requested interval, and non-AAIB incidents may be absent, unindexed or described without a clear commercial relationship. |
| IS 1950-01-01–1951-12-31 | Icelandic Meteorological Office Avalanche Service Authority | Operator location and incident terms Language: is | Not yet reviewed | Not yet successful | None recorded |
| IS 1950-01-01–2026-08-22 | Safety Investigation Authority Iceland Aviation investigation authority | Official report site search Language: is-en | Partial | 23/08/2026 | Wave 3; ledger incident-coverage-2026-08. Tracked source gap: https://github.com/marcus-hgic/heliski-26/issues/142 Known limitation: No bounded historical bulk index with heli-ski classification was identified. Known limitation: Icelandic report metadata and operator aliases require manual enumeration. |
| IS 1952-01-01–1956-12-31 | Icelandic Meteorological Office Avalanche Service Authority | Operator location and incident terms Language: is | Not yet reviewed | Not yet successful | None recorded |
| IS 1952-01-01–1956-12-31 | Safety Investigation Authority Iceland Authority | Operator location and incident terms Language: is | Not yet reviewed | Not yet successful | None recorded |
| IS 1957-01-01–1961-12-31 | Icelandic Meteorological Office Avalanche Service Authority | Operator location and incident terms Language: is | Not yet reviewed | Not yet successful | None recorded |
| IS 1957-01-01–1961-12-31 | Safety Investigation Authority Iceland Authority | Operator location and incident terms Language: is | Not yet reviewed | Not yet successful | None recorded |
| IS 1962-01-01–1966-12-31 | Icelandic Meteorological Office Avalanche Service Authority | Operator location and incident terms Language: is | Not yet reviewed | Not yet successful | None recorded |
| IS 1962-01-01–1966-12-31 | Safety Investigation Authority Iceland Authority | Operator location and incident terms Language: is | Not yet reviewed | Not yet successful | None recorded |
| IS 1967-01-01–1971-12-31 | Icelandic Meteorological Office Avalanche Service Authority | Operator location and incident terms Language: is | Not yet reviewed | Not yet successful | None recorded |
| IS 1967-01-01–1971-12-31 | Safety Investigation Authority Iceland Authority | Operator location and incident terms Language: is | Not yet reviewed | Not yet successful | None recorded |
| IS 1972-01-01–1976-12-31 | Safety Investigation Authority Iceland Authority | Operator location and incident terms Language: is | Not yet reviewed | Not yet successful | None recorded |
| IS 1972-01-01–1976-12-31 | Icelandic Meteorological Office Avalanche Service Authority | Operator location and incident terms Language: is | Not yet reviewed | Not yet successful | None recorded |
| IS 1977-01-01–1981-12-31 | Icelandic Meteorological Office Avalanche Service Authority | Operator location and incident terms Language: is | Not yet reviewed | Not yet successful | None recorded |
| IS 1977-01-01–1981-12-31 | Safety Investigation Authority Iceland Authority | Operator location and incident terms Language: is | Not yet reviewed | Not yet successful | None recorded |
| IS 1982-01-01–1986-12-31 | Safety Investigation Authority Iceland Authority | Operator location and incident terms Language: is | Not yet reviewed | Not yet successful | None recorded |
| IS 1982-01-01–1986-12-31 | Icelandic Meteorological Office Avalanche Service Authority | Operator location and incident terms Language: is | Not yet reviewed | Not yet successful | None recorded |
| IS 1987-01-01–1991-12-31 | Icelandic Meteorological Office Avalanche Service Authority | Operator location and incident terms Language: is | Not yet reviewed | Not yet successful | None recorded |
| IS 1987-01-01–1991-12-31 | Safety Investigation Authority Iceland Authority | Operator location and incident terms Language: is | Not yet reviewed | Not yet successful | None recorded |
| IS 1992-01-01–1996-12-31 | Icelandic Meteorological Office Avalanche Service Authority | Operator location and incident terms Language: is | Not yet reviewed | Not yet successful | None recorded |
| IS 1992-01-01–1996-12-31 | Safety Investigation Authority Iceland Authority | Operator location and incident terms Language: is | Not yet reviewed | Not yet successful | None recorded |
| IS 1997-01-01–2001-12-31 | Icelandic Meteorological Office Avalanche Service Authority | Operator location and incident terms Language: is | Not yet reviewed | Not yet successful | None recorded |
| IS 1997-01-01–2001-12-31 | Safety Investigation Authority Iceland Authority | Operator location and incident terms Language: is | Not yet reviewed | Not yet successful | None recorded |
| IS 2002-01-01–2006-12-31 | Icelandic Meteorological Office Avalanche Service Authority | Operator location and incident terms Language: is | Not yet reviewed | Not yet successful | None recorded |
| IS 2002-01-01–2006-12-31 | Safety Investigation Authority Iceland Authority | Operator location and incident terms Language: is | Not yet reviewed | Not yet successful | None recorded |
| IS 2007-01-01–2011-12-31 | Safety Investigation Authority Iceland Authority | Operator location and incident terms Language: is | Not yet reviewed | Not yet successful | None recorded |
| IS 2007-01-01–2011-12-31 | Icelandic Meteorological Office Avalanche Service Authority | Operator location and incident terms Language: is | Not yet reviewed | Not yet successful | None recorded |
| IS 2012-01-01–2016-12-31 | Icelandic Meteorological Office Avalanche Service Authority | Operator location and incident terms Language: is | Not yet reviewed | Not yet successful | None recorded |
| IS 2012-01-01–2016-12-31 | Safety Investigation Authority Iceland Authority | Operator location and incident terms Language: is | Not yet reviewed | Not yet successful | None recorded |
| IS 2017-01-01–2021-12-31 | Icelandic Meteorological Office Avalanche Service Authority | Operator location and incident terms Language: is | Not yet reviewed | Not yet successful | None recorded |
| IS 2017-01-01–2021-12-31 | Safety Investigation Authority Iceland Authority | Operator location and incident terms Language: is | Not yet reviewed | Not yet successful | None recorded |
| IS 2022-01-01–2026-08-31 | Safety Investigation Authority Iceland Authority | Operator location and incident terms Language: is | Not yet reviewed | Not yet successful | None recorded |
| IS 2022-01-01–2026-08-31 | Icelandic Meteorological Office Avalanche Service Authority | Operator location and incident terms Language: is | Not yet reviewed | Not yet successful | None recorded |
| IT 1950-01-01–1951-12-31 | AINEVA Research | Operator location and incident terms Language: it | Not yet reviewed | Not yet successful | None recorded |
| IT 1950-01-01–1951-12-31 | Avalanche.report Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| IT 1950-01-01–2026-08-22 | ANSV Italy Aviation investigation authority | Official report archive Language: it-en | Partial | 23/08/2026 | Wave 2; ledger incident-coverage-2026-08. Tracked source gap: https://github.com/marcus-hgic/heliski-26/issues/130 Known limitation: The archive is paginated without a bounded bulk export. Known limitation: Historical activity classification requires full-text and operator alias review. |
| IT 1952-01-01–1956-12-31 | Avalanche.report Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| IT 1952-01-01–1956-12-31 | AINEVA Research | Operator location and incident terms Language: it | Not yet reviewed | Not yet successful | None recorded |
| IT 1952-01-01–1956-12-31 | ANSV Italy Authority | Operator location and incident terms Language: it | Not yet reviewed | Not yet successful | None recorded |
| IT 1957-01-01–1961-12-31 | ANSV Italy Authority | Operator location and incident terms Language: it | Not yet reviewed | Not yet successful | None recorded |
| IT 1957-01-01–1961-12-31 | AINEVA Research | Operator location and incident terms Language: it | Not yet reviewed | Not yet successful | None recorded |
| IT 1957-01-01–1961-12-31 | Avalanche.report Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| IT 1962-01-01–1966-12-31 | AINEVA Research | Operator location and incident terms Language: it | Not yet reviewed | Not yet successful | None recorded |
| IT 1962-01-01–1966-12-31 | ANSV Italy Authority | Operator location and incident terms Language: it | Not yet reviewed | Not yet successful | None recorded |
| IT 1962-01-01–1966-12-31 | Avalanche.report Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| IT 1967-01-01–1971-12-31 | ANSV Italy Authority | Operator location and incident terms Language: it | Not yet reviewed | Not yet successful | None recorded |
| IT 1967-01-01–1971-12-31 | Avalanche.report Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| IT 1967-01-01–1971-12-31 | AINEVA Research | Operator location and incident terms Language: it | Not yet reviewed | Not yet successful | None recorded |
| IT 1972-01-01–1976-12-31 | Avalanche.report Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| IT 1972-01-01–1976-12-31 | ANSV Italy Authority | Operator location and incident terms Language: it | Not yet reviewed | Not yet successful | None recorded |
| IT 1972-01-01–1976-12-31 | AINEVA Research | Operator location and incident terms Language: it | Not yet reviewed | Not yet successful | None recorded |
| IT 1977-01-01–1981-12-31 | ANSV Italy Authority | Operator location and incident terms Language: it | Not yet reviewed | Not yet successful | None recorded |
| IT 1977-01-01–1981-12-31 | Avalanche.report Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| IT 1977-01-01–1981-12-31 | AINEVA Research | Operator location and incident terms Language: it | Not yet reviewed | Not yet successful | None recorded |
| IT 1982-01-01–1986-12-31 | AINEVA Research | Operator location and incident terms Language: it | Not yet reviewed | Not yet successful | None recorded |
| IT 1982-01-01–1986-12-31 | Avalanche.report Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| IT 1982-01-01–1986-12-31 | ANSV Italy Authority | Operator location and incident terms Language: it | Not yet reviewed | Not yet successful | None recorded |
| IT 1987-01-01–1991-12-31 | Avalanche.report Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| IT 1987-01-01–1991-12-31 | ANSV Italy Authority | Operator location and incident terms Language: it | Not yet reviewed | Not yet successful | None recorded |
| IT 1987-01-01–1991-12-31 | AINEVA Research | Operator location and incident terms Language: it | Not yet reviewed | Not yet successful | None recorded |
| IT 1992-01-01–1996-12-31 | ANSV Italy Authority | Operator location and incident terms Language: it | Not yet reviewed | Not yet successful | None recorded |
| IT 1992-01-01–1996-12-31 | AINEVA Research | Operator location and incident terms Language: it | Not yet reviewed | Not yet successful | None recorded |
| IT 1992-01-01–1996-12-31 | Avalanche.report Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| IT 1997-01-01–2001-12-31 | ANSV Italy Authority | Operator location and incident terms Language: it | Not yet reviewed | Not yet successful | None recorded |
| IT 1997-01-01–2001-12-31 | Avalanche.report Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| IT 1997-01-01–2001-12-31 | AINEVA Research | Operator location and incident terms Language: it | Not yet reviewed | Not yet successful | None recorded |
| IT 2002-01-01–2006-12-31 | ANSV Italy Authority | Operator location and incident terms Language: it | Not yet reviewed | Not yet successful | None recorded |
| IT 2002-01-01–2006-12-31 | AINEVA Research | Operator location and incident terms Language: it | Not yet reviewed | Not yet successful | None recorded |
| IT 2002-01-01–2006-12-31 | Avalanche.report Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| IT 2007-01-01–2011-12-31 | ANSV Italy Authority | Operator location and incident terms Language: it | Not yet reviewed | Not yet successful | None recorded |
| IT 2007-01-01–2011-12-31 | AINEVA Research | Operator location and incident terms Language: it | Not yet reviewed | Not yet successful | None recorded |
| IT 2007-01-01–2011-12-31 | Avalanche.report Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| IT 2012-01-01–2016-12-31 | ANSV Italy Authority | Operator location and incident terms Language: it | Not yet reviewed | Not yet successful | None recorded |
| IT 2012-01-01–2016-12-31 | AINEVA Research | Operator location and incident terms Language: it | Not yet reviewed | Not yet successful | None recorded |
| IT 2012-01-01–2016-12-31 | Avalanche.report Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| IT 2017-01-01–2021-12-31 | ANSV Italy Authority | Operator location and incident terms Language: it | Not yet reviewed | Not yet successful | None recorded |
| IT 2017-01-01–2021-12-31 | Avalanche.report Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| IT 2017-01-01–2021-12-31 | AINEVA Research | Operator location and incident terms Language: it | Not yet reviewed | Not yet successful | None recorded |
| IT 2022-01-01–2026-08-31 | ANSV Italy Authority | Operator location and incident terms Language: it | Partial | 30/08/2026 | The named ANSV source was searched directly in English and Italian, including the ANSV investigation-report index, notifications page, and news/press-release archive pages. Additional web searches used the suggested terms "eliski" and "incidente elicottero" together with Italian location and activity terms. The ANSV material is not exposed here as a bounded, fully enumerable incident dataset for the requested interval, and the archive pagination was not completely inspected; therefore this run cannot establish an exhaustive search or zero incidents beyond the candidates listed. |
| IT 2022-01-01–2026-08-31 | Avalanche.report Authority | Operator location and incident terms Language: de | Not yet reviewed | Not yet successful | None recorded |
| IT 2022-01-01–2026-08-31 | AINEVA Research | Operator location and incident terms Language: it | Partial | 27/08/2026 | The named AINEVA source was searched directly through its public incident index, seasonal-report pages, and indexed PDF reports for the 2022-01-01 through 2026-07-31 interval. AINEVA seasonal incident reports for 2022-2023, 2023-2024, and 2024-2025 were reviewed for heli-skiing references; the public incident index was visible in search results but its application content was not directly accessible without JavaScript. The 2025-2026 seasonal landing page was found but did not expose searchable incident content. Ordinary web search was then used to resolve the identity, date, commercial relationship, and investigation status of the qualifying lead. Because no bounded, enumerated official dataset covering the entire interval was inspected, the search cannot establish that no other qualifying incidents occurred. |
| JP 1950-01-01–2026-08-22 | Japan Transport Safety Board Aviation investigation authority | Official database csv and report index Language: ja-en | Partial | 23/08/2026 | Wave 3; ledger incident-coverage-2026-08. Tracked source gap: https://github.com/marcus-hgic/heliski-26/issues/145 Known limitation: Searchable records observed from 1974; pre-1998 keyword search is limited to summaries and causes. Known limitation: The activity is not structured and Japanese full-text classification remains necessary. |
| JP 1950-01-01–1951-12-31 | Japan National Police Agency Mountain Accidents Authority | Operator location and incident terms Language: ja | Not yet reviewed | Not yet successful | None recorded |
| JP 1952-01-01–1956-12-31 | Japan Transport Safety Board Authority | Operator location and incident terms Language: ja | Not yet reviewed | Not yet successful | None recorded |
| JP 1952-01-01–1956-12-31 | Japan National Police Agency Mountain Accidents Authority | Operator location and incident terms Language: ja | Not yet reviewed | Not yet successful | None recorded |
| JP 1957-01-01–1961-12-31 | Japan National Police Agency Mountain Accidents Authority | Operator location and incident terms Language: ja | Not yet reviewed | Not yet successful | None recorded |
| JP 1957-01-01–1961-12-31 | Japan Transport Safety Board Authority | Operator location and incident terms Language: ja | Not yet reviewed | Not yet successful | None recorded |
| JP 1962-01-01–1966-12-31 | Japan National Police Agency Mountain Accidents Authority | Operator location and incident terms Language: ja | Not yet reviewed | Not yet successful | None recorded |
| JP 1962-01-01–1966-12-31 | Japan Transport Safety Board Authority | Operator location and incident terms Language: ja | Not yet reviewed | Not yet successful | None recorded |
| JP 1967-01-01–1971-12-31 | Japan National Police Agency Mountain Accidents Authority | Operator location and incident terms Language: ja | Not yet reviewed | Not yet successful | None recorded |
| JP 1967-01-01–1971-12-31 | Japan Transport Safety Board Authority | Operator location and incident terms Language: ja | Not yet reviewed | Not yet successful | None recorded |
| JP 1972-01-01–1976-12-31 | Japan Transport Safety Board Authority | Operator location and incident terms Language: ja | Not yet reviewed | Not yet successful | None recorded |
| JP 1972-01-01–1976-12-31 | Japan National Police Agency Mountain Accidents Authority | Operator location and incident terms Language: ja | Not yet reviewed | Not yet successful | None recorded |
| JP 1977-01-01–1981-12-31 | Japan Transport Safety Board Authority | Operator location and incident terms Language: ja | Not yet reviewed | Not yet successful | None recorded |
| JP 1977-01-01–1981-12-31 | Japan National Police Agency Mountain Accidents Authority | Operator location and incident terms Language: ja | Not yet reviewed | Not yet successful | None recorded |
| JP 1982-01-01–1986-12-31 | Japan Transport Safety Board Authority | Operator location and incident terms Language: ja | Not yet reviewed | Not yet successful | None recorded |
| JP 1982-01-01–1986-12-31 | Japan National Police Agency Mountain Accidents Authority | Operator location and incident terms Language: ja | Not yet reviewed | Not yet successful | None recorded |
| JP 1987-01-01–1991-12-31 | Japan National Police Agency Mountain Accidents Authority | Operator location and incident terms Language: ja | Not yet reviewed | Not yet successful | None recorded |
| JP 1987-01-01–1991-12-31 | Japan Transport Safety Board Authority | Operator location and incident terms Language: ja | Not yet reviewed | Not yet successful | None recorded |
| JP 1992-01-01–1996-12-31 | Japan National Police Agency Mountain Accidents Authority | Operator location and incident terms Language: ja | Not yet reviewed | Not yet successful | None recorded |
| JP 1992-01-01–1996-12-31 | Japan Transport Safety Board Authority | Operator location and incident terms Language: ja | Not yet reviewed | Not yet successful | None recorded |
| JP 1997-01-01–2001-12-31 | Japan Transport Safety Board Authority | Operator location and incident terms Language: ja | Not yet reviewed | Not yet successful | None recorded |
| JP 1997-01-01–2001-12-31 | Japan National Police Agency Mountain Accidents Authority | Operator location and incident terms Language: ja | Not yet reviewed | Not yet successful | None recorded |
| JP 2002-01-01–2006-12-31 | Japan Transport Safety Board Authority | Operator location and incident terms Language: ja | Not yet reviewed | Not yet successful | None recorded |
| JP 2002-01-01–2006-12-31 | Japan National Police Agency Mountain Accidents Authority | Operator location and incident terms Language: ja | Not yet reviewed | Not yet successful | None recorded |
| JP 2007-01-01–2011-12-31 | Japan Transport Safety Board Authority | Operator location and incident terms Language: ja | Not yet reviewed | Not yet successful | None recorded |
| JP 2007-01-01–2011-12-31 | Japan National Police Agency Mountain Accidents Authority | Operator location and incident terms Language: ja | Not yet reviewed | Not yet successful | None recorded |
| JP 2012-01-01–2016-12-31 | Japan National Police Agency Mountain Accidents Authority | Operator location and incident terms Language: ja | Not yet reviewed | Not yet successful | None recorded |
| JP 2012-01-01–2016-12-31 | Japan Transport Safety Board Authority | Operator location and incident terms Language: ja | Not yet reviewed | Not yet successful | None recorded |
| JP 2017-01-01–2021-12-31 | Japan National Police Agency Mountain Accidents Authority | Operator location and incident terms Language: ja | Not yet reviewed | Not yet successful | None recorded |
| JP 2017-01-01–2021-12-31 | Japan Transport Safety Board Authority | Operator location and incident terms Language: ja | Not yet reviewed | Not yet successful | None recorded |
| JP 2022-01-01–2026-08-31 | Japan Transport Safety Board Authority | Operator location and incident terms Language: ja | Not yet reviewed | Not yet successful | None recorded |
| JP 2022-01-01–2026-08-31 | Japan National Police Agency Mountain Accidents Authority | Operator location and incident terms Language: ja | Not yet reviewed | Not yet successful | None recorded |
| NO 1950-01-01–1951-12-31 | Norwegian Avalanche Warning Service Official user contributed hazard observations | Structured avalanche incident enumeration Language: no-en | Partial | 04/09/2026 | Every Norwegian Regobs snow-incident observation in the five recorded activity categories was enumerated. Only explicit current-record heli-ski evidence creates a private review lead; all source facts require independent verification. |
| NO 1950-01-01–2026-08-22 | Norwegian Safety Investigation Authority Aviation investigation authority | Official report search Language: no-en | Partial | 23/08/2026 | Wave 2; ledger incident-coverage-2026-08. Tracked source gap: https://github.com/marcus-hgic/heliski-26/issues/133 Known limitation: The public interface does not expose a bulk export or heli-ski activity field. Known limitation: Norwegian avalanche events outside transport-investigation scope need a second authoritative source family. |
| NO 1952-01-01–1956-12-31 | Norwegian Safety Investigation Authority Authority | Operator location and incident terms Language: no | Not yet reviewed | Not yet successful | None recorded |
| NO 1952-01-01–1956-12-31 | Norwegian Avalanche Warning Service Official user contributed hazard observations | Structured avalanche incident enumeration Language: no-en | Partial | 04/09/2026 | Every Norwegian Regobs snow-incident observation in the five recorded activity categories was enumerated. Only explicit current-record heli-ski evidence creates a private review lead; all source facts require independent verification. |
| NO 1957-01-01–1961-12-31 | Norwegian Avalanche Warning Service Official user contributed hazard observations | Structured avalanche incident enumeration Language: no-en | Partial | 04/09/2026 | Every Norwegian Regobs snow-incident observation in the five recorded activity categories was enumerated. Only explicit current-record heli-ski evidence creates a private review lead; all source facts require independent verification. |
| NO 1957-01-01–1961-12-31 | Norwegian Safety Investigation Authority Authority | Operator location and incident terms Language: no | Not yet reviewed | Not yet successful | None recorded |
| NO 1962-01-01–1966-12-31 | Norwegian Safety Investigation Authority Authority | Operator location and incident terms Language: no | Not yet reviewed | Not yet successful | None recorded |
| NO 1962-01-01–1966-12-31 | Norwegian Avalanche Warning Service Official user contributed hazard observations | Structured avalanche incident enumeration Language: no-en | Partial | 04/09/2026 | Every Norwegian Regobs snow-incident observation in the five recorded activity categories was enumerated. Only explicit current-record heli-ski evidence creates a private review lead; all source facts require independent verification. |
| NO 1967-01-01–1971-12-31 | Norwegian Safety Investigation Authority Authority | Operator location and incident terms Language: no | Not yet reviewed | Not yet successful | None recorded |
| NO 1967-01-01–1971-12-31 | Norwegian Avalanche Warning Service Official user contributed hazard observations | Structured avalanche incident enumeration Language: no-en | Partial | 04/09/2026 | Every Norwegian Regobs snow-incident observation in the five recorded activity categories was enumerated. Only explicit current-record heli-ski evidence creates a private review lead; all source facts require independent verification. |
| NO 1972-01-01–1976-12-31 | Norwegian Safety Investigation Authority Authority | Operator location and incident terms Language: no | Not yet reviewed | Not yet successful | None recorded |
| NO 1972-01-01–1976-12-31 | Norwegian Avalanche Warning Service Official user contributed hazard observations | Structured avalanche incident enumeration Language: no-en | Partial | 04/09/2026 | Every Norwegian Regobs snow-incident observation in the five recorded activity categories was enumerated. Only explicit current-record heli-ski evidence creates a private review lead; all source facts require independent verification. |
| NO 1977-01-01–1981-12-31 | Norwegian Safety Investigation Authority Authority | Operator location and incident terms Language: no | Not yet reviewed | Not yet successful | None recorded |
| NO 1977-01-01–1981-12-31 | Norwegian Avalanche Warning Service Official user contributed hazard observations | Structured avalanche incident enumeration Language: no-en | Partial | 04/09/2026 | Every Norwegian Regobs snow-incident observation in the five recorded activity categories was enumerated. Only explicit current-record heli-ski evidence creates a private review lead; all source facts require independent verification. |
| NO 1982-01-01–1986-12-31 | Norwegian Safety Investigation Authority Authority | Operator location and incident terms Language: no | Not yet reviewed | Not yet successful | None recorded |
| NO 1982-01-01–1986-12-31 | Norwegian Avalanche Warning Service Official user contributed hazard observations | Structured avalanche incident enumeration Language: no-en | Partial | 04/09/2026 | Every Norwegian Regobs snow-incident observation in the five recorded activity categories was enumerated. Only explicit current-record heli-ski evidence creates a private review lead; all source facts require independent verification. |
| NO 1987-01-01–1991-12-31 | Norwegian Safety Investigation Authority Authority | Operator location and incident terms Language: no | Not yet reviewed | Not yet successful | None recorded |
| NO 1987-01-01–1991-12-31 | Norwegian Avalanche Warning Service Official user contributed hazard observations | Structured avalanche incident enumeration Language: no-en | Partial | 04/09/2026 | Every Norwegian Regobs snow-incident observation in the five recorded activity categories was enumerated. Only explicit current-record heli-ski evidence creates a private review lead; all source facts require independent verification. |
| NO 1992-01-01–1996-12-31 | Norwegian Avalanche Warning Service Official user contributed hazard observations | Structured avalanche incident enumeration Language: no-en | Partial | 04/09/2026 | Every Norwegian Regobs snow-incident observation in the five recorded activity categories was enumerated. Only explicit current-record heli-ski evidence creates a private review lead; all source facts require independent verification. |
| NO 1992-01-01–1996-12-31 | Norwegian Safety Investigation Authority Authority | Operator location and incident terms Language: no | Not yet reviewed | Not yet successful | None recorded |
| NO 1997-01-01–2001-12-31 | Norwegian Safety Investigation Authority Authority | Operator location and incident terms Language: no | Not yet reviewed | Not yet successful | None recorded |
| NO 1997-01-01–2001-12-31 | Norwegian Avalanche Warning Service Official user contributed hazard observations | Structured avalanche incident enumeration Language: no-en | Partial | 04/09/2026 | Every Norwegian Regobs snow-incident observation in the five recorded activity categories was enumerated. Only explicit current-record heli-ski evidence creates a private review lead; all source facts require independent verification. |
| NO 2002-01-01–2006-12-31 | Norwegian Avalanche Warning Service Official user contributed hazard observations | Structured avalanche incident enumeration Language: no-en | Partial | 04/09/2026 | Every Norwegian Regobs snow-incident observation in the five recorded activity categories was enumerated. Only explicit current-record heli-ski evidence creates a private review lead; all source facts require independent verification. |
| NO 2002-01-01–2006-12-31 | Norwegian Safety Investigation Authority Authority | Operator location and incident terms Language: no | Not yet reviewed | Not yet successful | None recorded |
| NO 2007-01-01–2011-12-31 | Norwegian Safety Investigation Authority Authority | Operator location and incident terms Language: no | Not yet reviewed | Not yet successful | None recorded |
| NO 2007-01-01–2011-12-31 | Norwegian Avalanche Warning Service Official user contributed hazard observations | Structured avalanche incident enumeration Language: no-en | Partial | 04/09/2026 | Every Norwegian Regobs snow-incident observation in the five recorded activity categories was enumerated. Only explicit current-record heli-ski evidence creates a private review lead; all source facts require independent verification. |
| NO 2012-01-01–2016-12-31 | Norwegian Safety Investigation Authority Authority | Operator location and incident terms Language: no | Not yet reviewed | Not yet successful | None recorded |
| NO 2012-01-01–2016-12-31 | Norwegian Avalanche Warning Service Official user contributed hazard observations | Structured avalanche incident enumeration Language: no-en | Partial | 04/09/2026 | Every Norwegian Regobs snow-incident observation in the five recorded activity categories was enumerated. Only explicit current-record heli-ski evidence creates a private review lead; all source facts require independent verification. |
| NO 2017-01-01–2021-12-31 | Norwegian Safety Investigation Authority Authority | Operator location and incident terms Language: no | Not yet reviewed | Not yet successful | None recorded |
| NO 2017-01-01–2021-12-31 | Norwegian Avalanche Warning Service Official user contributed hazard observations | Structured avalanche incident enumeration Language: no-en | Partial | 04/09/2026 | Every Norwegian Regobs snow-incident observation in the five recorded activity categories was enumerated. Only explicit current-record heli-ski evidence creates a private review lead; all source facts require independent verification. |
| NO 2022-01-01–2026-08-31 | Norwegian Avalanche Warning Service Official user contributed hazard observations | Structured avalanche incident enumeration Language: no-en | Partial | 04/09/2026 | Every Norwegian Regobs snow-incident observation in the five recorded activity categories was enumerated. Only explicit current-record heli-ski evidence creates a private review lead; all source facts require independent verification. |
| NO 2022-01-01–2026-08-31 | Norwegian Safety Investigation Authority Authority | Operator location and incident terms Language: no | Not yet reviewed | Not yet successful | None recorded |
| NP — South Asia 1950-01-01–2026-08-22 | Nepal Ministry Aircraft Accident Reports Aviation investigation authority | Official report category Language: ne-en | Partial | 23/08/2026 | Wave 3; ledger incident-coverage-2026-08. Tracked source gap: https://github.com/marcus-hgic/heliski-26/issues/141 Known limitation: The category is not a stable bulk export and has no activity taxonomy. Known limitation: Older reports and local operator aliases require manual enumeration. |
| NP 1952-01-01–1956-12-31 | Nepal Ministry Aircraft Accident Reports Authority | Operator location and incident terms Language: ne | Not yet reviewed | Not yet successful | None recorded |
| NP 1957-01-01–1961-12-31 | Nepal Ministry Aircraft Accident Reports Authority | Operator location and incident terms Language: ne | Not yet reviewed | Not yet successful | None recorded |
| NP 1962-01-01–1966-12-31 | Nepal Ministry Aircraft Accident Reports Authority | Operator location and incident terms Language: ne | Not yet reviewed | Not yet successful | None recorded |
| NP 1967-01-01–1971-12-31 | Nepal Ministry Aircraft Accident Reports Authority | Operator location and incident terms Language: ne | Not yet reviewed | Not yet successful | None recorded |
| NP 1972-01-01–1976-12-31 | Nepal Ministry Aircraft Accident Reports Authority | Operator location and incident terms Language: ne | Not yet reviewed | Not yet successful | None recorded |
| NP 1977-01-01–1981-12-31 | Nepal Ministry Aircraft Accident Reports Authority | Operator location and incident terms Language: ne | Not yet reviewed | Not yet successful | None recorded |
| NP 1982-01-01–1986-12-31 | Nepal Ministry Aircraft Accident Reports Authority | Operator location and incident terms Language: ne | Not yet reviewed | Not yet successful | None recorded |
| NP 1987-01-01–1991-12-31 | Nepal Ministry Aircraft Accident Reports Authority | Operator location and incident terms Language: ne | Not yet reviewed | Not yet successful | None recorded |
| NP 1992-01-01–1996-12-31 | Nepal Ministry Aircraft Accident Reports Authority | Operator location and incident terms Language: ne | Not yet reviewed | Not yet successful | None recorded |
| NP 1997-01-01–2001-12-31 | Nepal Ministry Aircraft Accident Reports Authority | Operator location and incident terms Language: ne | Not yet reviewed | Not yet successful | None recorded |
| NP 2002-01-01–2006-12-31 | Nepal Ministry Aircraft Accident Reports Authority | Operator location and incident terms Language: ne | Not yet reviewed | Not yet successful | None recorded |
| NP 2007-01-01–2011-12-31 | Nepal Ministry Aircraft Accident Reports Authority | Operator location and incident terms Language: ne | Not yet reviewed | Not yet successful | None recorded |
| NP 2012-01-01–2016-12-31 | Nepal Ministry Aircraft Accident Reports Authority | Operator location and incident terms Language: ne | Not yet reviewed | Not yet successful | None recorded |
| NP 2017-01-01–2021-12-31 | Nepal Ministry Aircraft Accident Reports Authority | Operator location and incident terms Language: ne | Not yet reviewed | Not yet successful | None recorded |
| NP 2022-01-01–2026-08-31 | Nepal Ministry Aircraft Accident Reports Authority | Operator location and incident terms Language: ne | Not yet reviewed | Not yet successful | None recorded |
| NZ 1950-01-01–2026-08-22 | New Zealand Mountain Safety Council Mountain safety research | Official research site search Language: en | Partial | 23/08/2026 | Wave 2; ledger incident-coverage-2026-08. Tracked source gap: https://github.com/marcus-hgic/heliski-26/issues/136 Known limitation: No public incident-level heli-ski export was identified. Known limitation: This source cannot alone enumerate aviation occurrences. |
| NZ 1950-01-01–1951-12-31 | Transport Accident Investigation Commission New Zealand Aviation investigation authority | Published aviation inquiry fulltext Language: en | Partial | 10/09/2026 | Every New Zealand aviation inquiry returned by TAIC's official ski full-text query was enumerated. Only explicit current-event heli-ski wording creates a private review lead; cross-references and ski-plane records are not promoted. |
| NZ 1950-01-01–1951-12-31 | New Zealand Avalanche Advisory Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| NZ 1952-01-01–1956-12-31 | New Zealand Avalanche Advisory Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| NZ 1952-01-01–1956-12-31 | New Zealand Mountain Safety Council Research | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| NZ 1952-01-01–1956-12-31 | Transport Accident Investigation Commission New Zealand Aviation investigation authority | Published aviation inquiry fulltext Language: en | Partial | 10/09/2026 | Every New Zealand aviation inquiry returned by TAIC's official ski full-text query was enumerated. Only explicit current-event heli-ski wording creates a private review lead; cross-references and ski-plane records are not promoted. |
| NZ 1957-01-01–1961-12-31 | New Zealand Avalanche Advisory Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| NZ 1957-01-01–1961-12-31 | Transport Accident Investigation Commission New Zealand Aviation investigation authority | Published aviation inquiry fulltext Language: en | Partial | 10/09/2026 | Every New Zealand aviation inquiry returned by TAIC's official ski full-text query was enumerated. Only explicit current-event heli-ski wording creates a private review lead; cross-references and ski-plane records are not promoted. |
| NZ 1957-01-01–1961-12-31 | New Zealand Mountain Safety Council Research | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| NZ 1962-01-01–1966-12-31 | New Zealand Mountain Safety Council Research | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| NZ 1962-01-01–1966-12-31 | New Zealand Avalanche Advisory Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| NZ 1962-01-01–1966-12-31 | Transport Accident Investigation Commission New Zealand Aviation investigation authority | Published aviation inquiry fulltext Language: en | Partial | 10/09/2026 | Every New Zealand aviation inquiry returned by TAIC's official ski full-text query was enumerated. Only explicit current-event heli-ski wording creates a private review lead; cross-references and ski-plane records are not promoted. |
| NZ 1967-01-01–1971-12-31 | New Zealand Avalanche Advisory Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| NZ 1967-01-01–1971-12-31 | Transport Accident Investigation Commission New Zealand Aviation investigation authority | Published aviation inquiry fulltext Language: en | Partial | 10/09/2026 | Every New Zealand aviation inquiry returned by TAIC's official ski full-text query was enumerated. Only explicit current-event heli-ski wording creates a private review lead; cross-references and ski-plane records are not promoted. |
| NZ 1967-01-01–1971-12-31 | New Zealand Mountain Safety Council Research | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| NZ 1972-01-01–1976-12-31 | New Zealand Avalanche Advisory Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| NZ 1972-01-01–1976-12-31 | Transport Accident Investigation Commission New Zealand Aviation investigation authority | Published aviation inquiry fulltext Language: en | Partial | 10/09/2026 | Every New Zealand aviation inquiry returned by TAIC's official ski full-text query was enumerated. Only explicit current-event heli-ski wording creates a private review lead; cross-references and ski-plane records are not promoted. |
| NZ 1972-01-01–1976-12-31 | New Zealand Mountain Safety Council Research | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| NZ 1977-01-01–1981-12-31 | Transport Accident Investigation Commission New Zealand Aviation investigation authority | Published aviation inquiry fulltext Language: en | Partial | 10/09/2026 | Every New Zealand aviation inquiry returned by TAIC's official ski full-text query was enumerated. Only explicit current-event heli-ski wording creates a private review lead; cross-references and ski-plane records are not promoted. |
| NZ 1977-01-01–1981-12-31 | New Zealand Avalanche Advisory Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| NZ 1977-01-01–1981-12-31 | New Zealand Mountain Safety Council Research | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| NZ 1982-01-01–1986-12-31 | New Zealand Avalanche Advisory Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| NZ 1982-01-01–1986-12-31 | New Zealand Mountain Safety Council Research | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| NZ 1982-01-01–1986-12-31 | Transport Accident Investigation Commission New Zealand Aviation investigation authority | Published aviation inquiry fulltext Language: en | Partial | 10/09/2026 | Every New Zealand aviation inquiry returned by TAIC's official ski full-text query was enumerated. Only explicit current-event heli-ski wording creates a private review lead; cross-references and ski-plane records are not promoted. |
| NZ 1987-01-01–1991-12-31 | New Zealand Mountain Safety Council Research | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| NZ 1987-01-01–1991-12-31 | Transport Accident Investigation Commission New Zealand Aviation investigation authority | Published aviation inquiry fulltext Language: en | Partial | 10/09/2026 | Every New Zealand aviation inquiry returned by TAIC's official ski full-text query was enumerated. Only explicit current-event heli-ski wording creates a private review lead; cross-references and ski-plane records are not promoted. |
| NZ 1987-01-01–1991-12-31 | New Zealand Avalanche Advisory Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| NZ 1992-01-01–1996-12-31 | Transport Accident Investigation Commission New Zealand Aviation investigation authority | Published aviation inquiry fulltext Language: en | Partial | 10/09/2026 | Every New Zealand aviation inquiry returned by TAIC's official ski full-text query was enumerated. Only explicit current-event heli-ski wording creates a private review lead; cross-references and ski-plane records are not promoted. |
| NZ 1992-01-01–1996-12-31 | New Zealand Avalanche Advisory Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| NZ 1992-01-01–1996-12-31 | New Zealand Mountain Safety Council Research | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| NZ 1997-01-01–2001-12-31 | New Zealand Avalanche Advisory Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| NZ 1997-01-01–2001-12-31 | Transport Accident Investigation Commission New Zealand Aviation investigation authority | Published aviation inquiry fulltext Language: en | Partial | 10/09/2026 | Every New Zealand aviation inquiry returned by TAIC's official ski full-text query was enumerated. Only explicit current-event heli-ski wording creates a private review lead; cross-references and ski-plane records are not promoted. |
| NZ 1997-01-01–2001-12-31 | New Zealand Mountain Safety Council Research | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| NZ 2002-01-01–2006-12-31 | Transport Accident Investigation Commission New Zealand Aviation investigation authority | Published aviation inquiry fulltext Language: en | Partial | 10/09/2026 | Every New Zealand aviation inquiry returned by TAIC's official ski full-text query was enumerated. Only explicit current-event heli-ski wording creates a private review lead; cross-references and ski-plane records are not promoted. |
| NZ 2002-01-01–2006-12-31 | New Zealand Mountain Safety Council Research | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| NZ 2002-01-01–2006-12-31 | New Zealand Avalanche Advisory Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| NZ 2007-01-01–2011-12-31 | New Zealand Avalanche Advisory Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| NZ 2007-01-01–2011-12-31 | Transport Accident Investigation Commission New Zealand Aviation investigation authority | Published aviation inquiry fulltext Language: en | Partial | 10/09/2026 | Every New Zealand aviation inquiry returned by TAIC's official ski full-text query was enumerated. Only explicit current-event heli-ski wording creates a private review lead; cross-references and ski-plane records are not promoted. |
| NZ 2007-01-01–2011-12-31 | New Zealand Mountain Safety Council Research | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| NZ 2012-01-01–2016-12-31 | New Zealand Mountain Safety Council Research | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| NZ 2012-01-01–2016-12-31 | New Zealand Avalanche Advisory Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| NZ 2012-01-01–2016-12-31 | Transport Accident Investigation Commission New Zealand Aviation investigation authority | Published aviation inquiry fulltext Language: en | Partial | 10/09/2026 | Every New Zealand aviation inquiry returned by TAIC's official ski full-text query was enumerated. Only explicit current-event heli-ski wording creates a private review lead; cross-references and ski-plane records are not promoted. |
| NZ 2017-01-01–2021-12-31 | New Zealand Mountain Safety Council Research | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| NZ 2017-01-01–2021-12-31 | Transport Accident Investigation Commission New Zealand Aviation investigation authority | Published aviation inquiry fulltext Language: en | Partial | 10/09/2026 | Every New Zealand aviation inquiry returned by TAIC's official ski full-text query was enumerated. Only explicit current-event heli-ski wording creates a private review lead; cross-references and ski-plane records are not promoted. |
| NZ 2017-01-01–2021-12-31 | New Zealand Avalanche Advisory Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| NZ 2022-01-01–2026-08-31 | Transport Accident Investigation Commission New Zealand Aviation investigation authority | Published aviation inquiry fulltext Language: en | Partial | 10/09/2026 | Every New Zealand aviation inquiry returned by TAIC's official ski full-text query was enumerated. Only explicit current-event heli-ski wording creates a private review lead; cross-references and ski-plane records are not promoted. |
| NZ 2022-01-01–2026-08-31 | New Zealand Avalanche Advisory Authority | Operator location and incident terms Language: en | Partial | 05/09/2026 | The named New Zealand Avalanche Advisory website was searched directly through its public news, community-story and public-observation guidance pages, followed by targeted web searches and review of relevant Transport Accident Investigation Commission and independent reporting. The available public pages do not expose a bounded, enumerated incident dataset for the full interval 2022-01-01 through 2026-08-31, and no complete pagination or record count could be established. Accordingly, this run cannot support an exhaustive-coverage claim or a conclusion that no qualifying commercial heli-ski incidents occurred in New Zealand during the interval. |
| NZ 2022-01-01–2026-08-31 | New Zealand Mountain Safety Council Research | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| SE 1950-01-01–2026-08-22 | Swedish Accident Investigation Authority Multi domain investigation authority | Official investigation search Language: sv-en | Partial | 23/08/2026 | Wave 2; ledger incident-coverage-2026-08. Tracked source gap: https://github.com/marcus-hgic/heliski-26/issues/134 Known limitation: The public search exposes no bounded bulk export or activity taxonomy. Known limitation: Direct TLS from this runner remains unavailable; future incremental checks use the saved index cursor and must not claim direct-fetch health. Known limitation: No operator alias was promoted beyond the exact official name Niehku Adventure AB; SHK does not establish the flight operator. |
| SE 1952-01-01–1956-12-31 | Swedish Accident Investigation Authority Authority | Operator location and incident terms Language: sv | Not yet reviewed | Not yet successful | None recorded |
| SE 1957-01-01–1961-12-31 | Swedish Accident Investigation Authority Authority | Operator location and incident terms Language: sv | Not yet reviewed | Not yet successful | None recorded |
| SE 1962-01-01–1966-12-31 | Swedish Accident Investigation Authority Authority | Operator location and incident terms Language: sv | Not yet reviewed | Not yet successful | None recorded |
| SE 1967-01-01–1971-12-31 | Swedish Accident Investigation Authority Authority | Operator location and incident terms Language: sv | Not yet reviewed | Not yet successful | None recorded |
| SE 1972-01-01–1976-12-31 | Swedish Accident Investigation Authority Authority | Operator location and incident terms Language: sv | Not yet reviewed | Not yet successful | None recorded |
| SE 1977-01-01–1981-12-31 | Swedish Accident Investigation Authority Authority | Operator location and incident terms Language: sv | Not yet reviewed | Not yet successful | None recorded |
| SE 1982-01-01–1986-12-31 | Swedish Accident Investigation Authority Authority | Operator location and incident terms Language: sv | Not yet reviewed | Not yet successful | None recorded |
| SE 1987-01-01–1991-12-31 | Swedish Accident Investigation Authority Authority | Operator location and incident terms Language: sv | Not yet reviewed | Not yet successful | None recorded |
| SE 1992-01-01–1996-12-31 | Swedish Accident Investigation Authority Authority | Operator location and incident terms Language: sv | Not yet reviewed | Not yet successful | None recorded |
| SE 1997-01-01–2001-12-31 | Swedish Accident Investigation Authority Authority | Operator location and incident terms Language: sv | Not yet reviewed | Not yet successful | None recorded |
| SE 2002-01-01–2006-12-31 | Swedish Accident Investigation Authority Authority | Operator location and incident terms Language: sv | Not yet reviewed | Not yet successful | None recorded |
| SE 2007-01-01–2011-12-31 | Swedish Accident Investigation Authority Authority | Operator location and incident terms Language: sv | Not yet reviewed | Not yet successful | None recorded |
| SE 2012-01-01–2016-12-31 | Swedish Accident Investigation Authority Authority | Operator location and incident terms Language: sv | Not yet reviewed | Not yet successful | None recorded |
| SE 2017-01-01–2021-12-31 | Swedish Accident Investigation Authority Authority | Operator location and incident terms Language: sv | Not yet reviewed | Not yet successful | None recorded |
| SE 2022-01-01–2026-08-31 | Swedish Accident Investigation Authority Authority | Operator location and incident terms Language: sv | Not yet reviewed | Not yet successful | None recorded |
| TR — Caucasus and Kaçkar market 1950-01-01–2026-08-22 | Türkiye Transport Safety Investigation Center Aviation investigation authority | Official report site search Language: tr-en | Partial | 23/08/2026 | Wave 3; ledger incident-coverage-2026-08. Tracked source gap: https://github.com/marcus-hgic/heliski-26/issues/137 Known limitation: No bounded heli-ski activity export is available. Known limitation: Historical completeness and Kaçkar operator aliases require manual report enumeration. |
| TR 1952-01-01–1956-12-31 | Türkiye Transport Safety Investigation Center Authority | Operator location and incident terms Language: tr | Not yet reviewed | Not yet successful | None recorded |
| TR 1957-01-01–1961-12-31 | Türkiye Transport Safety Investigation Center Authority | Operator location and incident terms Language: tr | Not yet reviewed | Not yet successful | None recorded |
| TR 1962-01-01–1966-12-31 | Türkiye Transport Safety Investigation Center Authority | Operator location and incident terms Language: tr | Not yet reviewed | Not yet successful | None recorded |
| TR 1967-01-01–1971-12-31 | Türkiye Transport Safety Investigation Center Authority | Operator location and incident terms Language: tr | Not yet reviewed | Not yet successful | None recorded |
| TR 1972-01-01–1976-12-31 | Türkiye Transport Safety Investigation Center Authority | Operator location and incident terms Language: tr | Not yet reviewed | Not yet successful | None recorded |
| TR 1977-01-01–1981-12-31 | Türkiye Transport Safety Investigation Center Authority | Operator location and incident terms Language: tr | Not yet reviewed | Not yet successful | None recorded |
| TR 1982-01-01–1986-12-31 | Türkiye Transport Safety Investigation Center Authority | Operator location and incident terms Language: tr | Not yet reviewed | Not yet successful | None recorded |
| TR 1987-01-01–1991-12-31 | Türkiye Transport Safety Investigation Center Authority | Operator location and incident terms Language: tr | Not yet reviewed | Not yet successful | None recorded |
| TR 1992-01-01–1996-12-31 | Türkiye Transport Safety Investigation Center Authority | Operator location and incident terms Language: tr | Not yet reviewed | Not yet successful | None recorded |
| TR 1997-01-01–2001-12-31 | Türkiye Transport Safety Investigation Center Authority | Operator location and incident terms Language: tr | Not yet reviewed | Not yet successful | None recorded |
| TR 2002-01-01–2006-12-31 | Türkiye Transport Safety Investigation Center Authority | Operator location and incident terms Language: tr | Not yet reviewed | Not yet successful | None recorded |
| TR 2007-01-01–2011-12-31 | Türkiye Transport Safety Investigation Center Authority | Operator location and incident terms Language: tr | Not yet reviewed | Not yet successful | None recorded |
| TR 2012-01-01–2016-12-31 | Türkiye Transport Safety Investigation Center Authority | Operator location and incident terms Language: tr | Not yet reviewed | Not yet successful | None recorded |
| TR 2017-01-01–2021-12-31 | Türkiye Transport Safety Investigation Center Authority | Operator location and incident terms Language: tr | Not yet reviewed | Not yet successful | None recorded |
| TR 2022-01-01–2026-08-31 | Türkiye Transport Safety Investigation Center Authority | Operator location and incident terms Language: tr | Not yet reviewed | Not yet successful | None recorded |
| US 1950-01-01–1951-12-31 | U.S. Federal Aviation Administration Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1950-01-01–1951-12-31 | CDC Travelers Health Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1950-01-01–1951-12-31 | Electronic Code of Federal Regulations Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1950-01-01–2026-08-22 | Avalanche.org US Accident Database Avalanche authority | Official accident database filter Language: en | Partial | 23/08/2026 | Wave 1; ledger incident-coverage-2026-08. Tracked source gap: https://github.com/marcus-hgic/heliski-26/issues/132 Known limitation: The public API population covers fatal avalanche reports and does not enumerate non-fatal aviation occurrences. Known limitation: The earliest returned public record is 1985; older avalanche coverage is not asserted complete. |
| US 1950-01-01–1951-12-31 | NOAA National Centers for Environmental Information Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1950-01-01–1951-12-31 | U.S. Department of State Travel Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1950-01-01–1951-12-31 | U.S. Forest Service Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1950-01-01–2026-08-22 | National Transportation Safety Board Aviation investigation authority | Carol and downloadable dataset Language: en | Partial | 23/08/2026 | Wave 1; ledger incident-coverage-2026-08. Tracked source gap: https://github.com/marcus-hgic/heliski-26/issues/132 Known limitation: A case-level 1950–1961 CAB scan requires physical or staff-assisted NARA access to monthly minutes and is accepted by #102 as a bounded source-access exception. Known limitation: The broad string 'helicopter ski' is rejected because it falsely matches 'helicopter skids'; exact narrative aliases are recorded in query-packs-v2. |
| US 1952-01-01–1956-12-31 | Avalanche.org US Accident Database Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1952-01-01–1956-12-31 | Electronic Code of Federal Regulations Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1952-01-01–1956-12-31 | U.S. Forest Service Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1952-01-01–1956-12-31 | U.S. Department of State Travel Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1952-01-01–1956-12-31 | U.S. Federal Aviation Administration Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1952-01-01–1956-12-31 | CDC Travelers Health Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1952-01-01–1956-12-31 | NOAA National Centers for Environmental Information Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1957-01-01–1961-12-31 | CDC Travelers Health Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1957-01-01–1961-12-31 | Avalanche.org US Accident Database Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1957-01-01–1961-12-31 | U.S. Forest Service Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1957-01-01–1961-12-31 | NOAA National Centers for Environmental Information Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1957-01-01–1961-12-31 | Electronic Code of Federal Regulations Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1957-01-01–1961-12-31 | U.S. Department of State Travel Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1957-01-01–1961-12-31 | U.S. Federal Aviation Administration Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1962-01-01–1966-12-31 | U.S. Forest Service Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1962-01-01–1966-12-31 | NOAA National Centers for Environmental Information Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1962-01-01–1966-12-31 | U.S. Department of State Travel Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1962-01-01–1966-12-31 | U.S. Federal Aviation Administration Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1962-01-01–1966-12-31 | CDC Travelers Health Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1962-01-01–1966-12-31 | Electronic Code of Federal Regulations Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1962-01-01–1966-12-31 | Avalanche.org US Accident Database Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1967-01-01–1971-12-31 | CDC Travelers Health Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1967-01-01–1971-12-31 | U.S. Federal Aviation Administration Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1967-01-01–1971-12-31 | Avalanche.org US Accident Database Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1967-01-01–1971-12-31 | U.S. Department of State Travel Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1967-01-01–1971-12-31 | NOAA National Centers for Environmental Information Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1967-01-01–1971-12-31 | U.S. Forest Service Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1967-01-01–1971-12-31 | Electronic Code of Federal Regulations Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1972-01-01–1976-12-31 | Electronic Code of Federal Regulations Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1972-01-01–1976-12-31 | U.S. Department of State Travel Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1972-01-01–1976-12-31 | U.S. Forest Service Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1972-01-01–1976-12-31 | Avalanche.org US Accident Database Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1972-01-01–1976-12-31 | CDC Travelers Health Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1972-01-01–1976-12-31 | U.S. Federal Aviation Administration Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1972-01-01–1976-12-31 | NOAA National Centers for Environmental Information Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1977-01-01–1981-12-31 | U.S. Department of State Travel Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1977-01-01–1981-12-31 | U.S. Federal Aviation Administration Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1977-01-01–1981-12-31 | Avalanche.org US Accident Database Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1977-01-01–1981-12-31 | U.S. Forest Service Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1977-01-01–1981-12-31 | CDC Travelers Health Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1977-01-01–1981-12-31 | NOAA National Centers for Environmental Information Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1977-01-01–1981-12-31 | Electronic Code of Federal Regulations Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1982-01-01–1986-12-31 | Avalanche.org US Accident Database Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1982-01-01–1986-12-31 | NOAA National Centers for Environmental Information Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1982-01-01–1986-12-31 | U.S. Forest Service Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1982-01-01–1986-12-31 | U.S. Department of State Travel Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1982-01-01–1986-12-31 | CDC Travelers Health Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1982-01-01–1986-12-31 | Electronic Code of Federal Regulations Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1982-01-01–1986-12-31 | U.S. Federal Aviation Administration Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1987-01-01–1991-12-31 | Electronic Code of Federal Regulations Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1987-01-01–1991-12-31 | Avalanche.org US Accident Database Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1987-01-01–1991-12-31 | U.S. Federal Aviation Administration Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1987-01-01–1991-12-31 | U.S. Forest Service Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1987-01-01–1991-12-31 | CDC Travelers Health Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1987-01-01–1991-12-31 | U.S. Department of State Travel Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1987-01-01–1991-12-31 | NOAA National Centers for Environmental Information Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1992-01-01–1996-12-31 | Electronic Code of Federal Regulations Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1992-01-01–1996-12-31 | U.S. Federal Aviation Administration Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1992-01-01–1996-12-31 | Avalanche.org US Accident Database Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1992-01-01–1996-12-31 | CDC Travelers Health Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1992-01-01–1996-12-31 | U.S. Forest Service Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1992-01-01–1996-12-31 | NOAA National Centers for Environmental Information Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1992-01-01–1996-12-31 | U.S. Department of State Travel Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1997-01-01–2001-12-31 | Electronic Code of Federal Regulations Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1997-01-01–2001-12-31 | U.S. Department of State Travel Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1997-01-01–2001-12-31 | NOAA National Centers for Environmental Information Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1997-01-01–2001-12-31 | U.S. Forest Service Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1997-01-01–2001-12-31 | CDC Travelers Health Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1997-01-01–2001-12-31 | U.S. Federal Aviation Administration Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 1997-01-01–2001-12-31 | Avalanche.org US Accident Database Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 2002-01-01–2006-12-31 | U.S. Forest Service Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 2002-01-01–2006-12-31 | NOAA National Centers for Environmental Information Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 2002-01-01–2006-12-31 | U.S. Department of State Travel Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 2002-01-01–2006-12-31 | Electronic Code of Federal Regulations Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 2002-01-01–2006-12-31 | Avalanche.org US Accident Database Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 2002-01-01–2006-12-31 | CDC Travelers Health Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 2002-01-01–2006-12-31 | U.S. Federal Aviation Administration Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 2007-01-01–2011-12-31 | CDC Travelers Health Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 2007-01-01–2011-12-31 | U.S. Department of State Travel Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 2007-01-01–2011-12-31 | Electronic Code of Federal Regulations Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 2007-01-01–2011-12-31 | Avalanche.org US Accident Database Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 2007-01-01–2011-12-31 | U.S. Federal Aviation Administration Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 2007-01-01–2011-12-31 | NOAA National Centers for Environmental Information Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 2007-01-01–2011-12-31 | U.S. Forest Service Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 2008-01-01–2011-12-31 | National Transportation Safety Board Aviation authority | Heli ski activity Language: en | Substantial | 02/09/2026 | Every United States event row in the named official NTSB avall snapshot was checked from 2008 with helicopter, activity and catalogue-entity filters. Generic ski wording remains uncertain and wording omissions remain an explicit gap. |
| US 2012-01-01–2016-12-31 | CDC Travelers Health Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 2012-01-01–2016-12-31 | U.S. Federal Aviation Administration Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 2012-01-01–2016-12-31 | Electronic Code of Federal Regulations Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 2012-01-01–2016-12-31 | U.S. Forest Service Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 2012-01-01–2016-12-31 | U.S. Department of State Travel Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 2012-01-01–2016-12-31 | NOAA National Centers for Environmental Information Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 2012-01-01–2016-12-31 | Avalanche.org US Accident Database Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 2012-01-01–2016-12-31 | National Transportation Safety Board Aviation authority | Heli ski activity Language: en | Substantial | 02/09/2026 | Every United States event row in the named official NTSB avall snapshot was checked from 2008 with helicopter, activity and catalogue-entity filters. Generic ski wording remains uncertain and wording omissions remain an explicit gap. |
| US 2017-01-01–2021-12-31 | U.S. Federal Aviation Administration Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 2017-01-01–2021-12-31 | National Transportation Safety Board Aviation authority | Heli ski activity Language: en | Substantial | 02/09/2026 | Every United States event row in the named official NTSB avall snapshot was checked from 2008 with helicopter, activity and catalogue-entity filters. Generic ski wording remains uncertain and wording omissions remain an explicit gap. |
| US 2017-01-01–2021-12-31 | Electronic Code of Federal Regulations Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 2017-01-01–2021-12-31 | CDC Travelers Health Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 2017-01-01–2021-12-31 | NOAA National Centers for Environmental Information Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 2017-01-01–2021-12-31 | Avalanche.org US Accident Database Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 2017-01-01–2021-12-31 | U.S. Forest Service Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 2017-01-01–2021-12-31 | U.S. Department of State Travel Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 2022-01-01–2026-08-31 | Avalanche.org US Accident Database Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 2022-01-01–2026-08-31 | U.S. Forest Service Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 2022-01-01–2026-08-31 | NOAA National Centers for Environmental Information Authority | Operator location and incident terms Language: en | Partial | 06/09/2026 | The named NOAA National Centers for Environmental Information source was searched directly using the supplied terms and related incident-oriented searches. Additional searches were conducted against NTSB, OSHA, Alaska state-public-safety material, the Chugach National Forest Avalanche Information Center ecosystem, and independent Alaska reporting to identify and resolve potential commercial heli-skiing connections. The run used ordinary web_search rather than a bounded, enumerated official incident dataset or completed index export; therefore the interval cannot be claimed to have been exhaustively searched, and zero additional incidents would not establish that none occurred. |
| US 2022-01-01–2026-08-31 | U.S. Department of State Travel Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 2022-01-01–2026-08-31 | National Transportation Safety Board Aviation authority | Heli ski activity Language: en | Substantial | 02/09/2026 | Every United States event row in the named official NTSB avall snapshot was checked from 2008 with helicopter, activity and catalogue-entity filters. Generic ski wording remains uncertain and wording omissions remain an explicit gap. |
| US 2022-01-01–2026-08-31 | U.S. Federal Aviation Administration Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 2022-01-01–2026-08-31 | Electronic Code of Federal Regulations Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US 2022-01-01–2026-08-31 | CDC Travelers Health Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US-CA 1950-01-01–1951-12-31 | Mono County Government Records Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US-CA 1952-01-01–1956-12-31 | Mono County Government Records Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US-CA 1957-01-01–1961-12-31 | Mono County Government Records Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US-CA 1962-01-01–1966-12-31 | Mono County Government Records Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US-CA 1967-01-01–1971-12-31 | Mono County Government Records Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US-CA 1972-01-01–1976-12-31 | Mono County Government Records Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US-CA 1977-01-01–1981-12-31 | Mono County Government Records Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US-CA 1982-01-01–1986-12-31 | Mono County Government Records Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US-CA 1987-01-01–1991-12-31 | Mono County Government Records Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US-CA 1992-01-01–1996-12-31 | Mono County Government Records Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US-CA 1997-01-01–2001-12-31 | Mono County Government Records Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US-CA 2002-01-01–2006-12-31 | Mono County Government Records Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US-CA 2007-01-01–2011-12-31 | Mono County Government Records Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US-CA 2012-01-01–2016-12-31 | Mono County Government Records Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US-CA 2017-01-01–2021-12-31 | Mono County Government Records Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
| US-CA 2022-01-01–2026-08-31 | Mono County Government Records Authority | Operator location and incident terms Language: en | Not yet reviewed | Not yet successful | None recorded |
Deduplication
Candidates are compared in order by investigation ID; registration and date; operator, date and location; date range, geography, aircraft and people outcome; then narrative similarity. Only high-confidence deterministic matches can merge automatically. Uncertain pairs require editorial review, and merges are audited and reversible.
Unknowns and changing records
Unknown remains unknown. Initial, preliminary, under-investigation, final and closed records are labeled separately. Official findings appear only after the responsible authority publishes them. Material updates revise the same canonical incident and add a public revision; they do not create a duplicate.
People, corrections and reply
Victims are not named by default and require separate ethical and legal review. Materially named parties may reply. Corrections are assessed against sources and shown in revision history. Contact the editorial desk.
Editorial process
The Heliski International editorial team uses multilingual discovery, source comparison, structured extraction, deduplication checks and draft preparation. The team abstains when public evidence is insufficient. Candidates, evidence and exclusions remain private. High-risk publication is gated by source, claim, policy and editorial-review controls; missing facts cannot be invented or bypass the incident kill switch.