NTSB investigations, AK
42 cases where the sequence of events included Unknown or undetermined.
Cases per year
| 2011 | 1 |
|---|---|
| 2012 | 1 |
| 2014 | 1 |
| 2015 | 2 |
| 2016 | 2 |
| 2017 | 1 |
| 2018 | 4 |
| 2020 | 1 |
| 2021 | 4 |
| 2022 | 4 |
| 2023 | 6 |
| 2024 | 6 |
| 2025 | 4 |
| 2026 | 5 |
Where
Open the mapLatest cases
Query with SQL
duckdb -csv -c "SELECT c.\"ntsbNumber\", c.\"eventDate\", c.\"eventType\", c.\"eventCity\", c.\"eventStateOrRegion\", a.n_number, a.\"aircraftMake\", a.\"aircraftModel\", c.\"highestInjuryLevel\", c.\"totalFatal\", c.\"completionStatus\", c.report_url
FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = c.\"mKey\" AND a.position = 1
WHERE c.\"eventStateOrRegion\" = 'AK' AND c.\"eventCountry\" = 'USA'
AND c.\"mKey\" IN (SELECT s.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s.\"tier2Number\" = '000' AND s.case_mkey IN (SELECT case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' WHERE \"isDefiningEvent\"))
ORDER BY c.\"eventDate\" DESC, c.\"ntsbNumber\" DESC"Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.
SELECT c."ntsbNumber", c."eventDate", c."eventType", c."eventCity", c."eventStateOrRegion", a.n_number, a."aircraftMake", a."aircraftModel", c."highestInjuryLevel", c."totalFatal", c."completionStatus", c.report_url FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = c."mKey" AND a.position = 1 WHERE c."eventStateOrRegion" = 'AK' AND c."eventCountry" = 'USA' AND c."mKey" IN (SELECT s.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s."tier2Number" = '000' AND s.case_mkey IN (SELECT case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' WHERE "isDefiningEvent")) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
Run it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.
NTSB ANC26FA106Accident · 2 fatalClass 3 · FieldInvestigation openPiper PA-18-150 · Northway, AKNTSB ANC26FA105Accident · 2 fatalClass 3 · FieldInvestigation openCessna A185F · Stony River, AKNTSB WPR26FA309Accident · 8 fatalClass 3 · FieldPreliminary reportCessna 441 · Cape Newenham, AKOn August 20, 2026, at about 1145 Alaska daylight time, a Cessna 441, N128EZ, was destroyed when it was involved in an accident near Cape Newenham, Alaska. The two pilots and six passengers were fatally injured. The airplane was operated as a Title 14 Code of…NTSB ANC26FA077Accident · 3 fatalClass 3 · FieldPreliminary reportPiper PA22 · Chitina, AKOn July 27, 2026, about 2130 Alaska daylight time, a deregistered Piper PA-22-150 airplane, N4535A, was destroyed when it was involved in an accident near Chitina, Alaska. The pilot and two passengers were fatally injured. The airplane was operated as a Title…NTSB ANC26LA071Accident · Serious injuriesClass 4 · LimitedInvestigation openBellanca 7GCBC · Skwentna, AKNTSB ANC25LA121Accident · No injuriesClass 4 · LimitedFinal reportMaule M-4-210C · Lime Village, AKA collision with terrain during takeoff.NTSB ANC25FA044Accident · 2 fatalClass 3 · FieldPreliminary reportRobinson Helicopter R66 · Kaparuk, AKOn June 4, 2025 about 1055 Alaska daylight time, a Robinson R66 turbine-powered helicopter, N962MD, was substantially damaged when it was involved in an accident near Kaparuk, Alaska. The pilot and passenger were fatally injured. The helicopter was operated…NTSB ANC25FA035Accident · 2 fatalClass 3 · FieldPreliminary reportCessna T207 · Nanwalek, AKOn April 28, 2025, about 1355 Alaska daylight time, a Cessna T207 airplane, N91025, was substantially damaged when it was involved in an accident near Nanwalek, Alaska. The pilot and one passenger were fatally injured. One passenger was seriously injured. The…NTSB ANC25LA019Accident · No injuriesClass 3 · LimitedFinal reportPiper PA-18-150 · Wasilla, AKA total loss of engine power for undetermined reasons.NTSB ANC24FA091Accident · 2 fatalClass 3 · FieldPreliminary reportChampion 7GCBC · Ninilchik, AKOn September 13, 2024, about 0803 Alaska daylight time (AKDT), a Champion (Citabria) 7GCBC, N8CK, was substantially damaged when it was involved in an accident near Ninilchik, Alaska. The pilot and passenger were fatally injured. The airplane was operated as…NTSB ANC24LA073Accident · No injuriesClass 3 · LimitedFinal reportDe Havilland DHC2 · Anchorage, AKA partial loss of power during takeoff climb for undetermined reasons.NTSB ANC24LA064Accident · No injuriesClass 3 · LimitedFinal reportDehavilland DHC-2T · Petersville, AKAn in-flight loss of thrust due to an uncommanded feathering of the propeller for reasons that could not be determined.NTSB ANC24FA052Accident · 2 fatalClass 3 · FieldPreliminary reportPiper PA-18-150 · Moose Pass, AKOn June 18, 2024, about 1400 Alaska daylight time, a float-equipped Piper PA-18-150 airplane, N645DT, was substantially damaged when it was involved in an accident near Moose Pass, Alaska. The instructor pilot and the pilot receiving instruction were fatally…NTSB ANC24LA049Accident · Serious injuriesClass 3 · LimitedFinal reportDehavilland Beaver L-20A (DHC-2) · Port Alsworth, AKA partial loss of engine power for reasons that could not be determined.NTSB ANC24FA029Accident · 2 fatalClass 3 · FieldFinal reportDouglas C54D · Fairbanks, AKA loss of power of the No. 1 engine for reasons that could not be determined, and the incorrect installation of a B-nut fitting in the propeller feathering system, which allowed engine oil to spray onto the exhaust system when the propeller was feathered…NTSB ANC24FA008Accident · 2 fatalClass 3 · FieldFinal reportPiper PA-18-150 · Anchor Point, AKAn impact to the left wing, at an undetermined time, for reasons that could not be determined, which partially separated the left wing and rendered the airplane uncontrollable.NTSB ANC23LA080Accident · No injuriesClass 3 · LimitedFinal reportCessna A185F · Homer, AKA total loss of engine power for undetermined reasons.NTSB ANC23LA070Accident · Minor injuriesClass 3 · LimitedFinal reportOliver Robert K Oliver Series 6 · Big Delta, AKA partial loss of engine power for undetermined reasons.NTSB ANC23FA061Accident · 2 fatalClass 3 · FieldFinal reportPiper PA-18-150 · Skwentna, AKAn impact with terrain for reasons that could not be determined because the airplane was not recovered due to the inaccessible nature of the accident site.NTSB ANC23LA054Accident · Serious injuriesClass 3 · LimitedFinal reportDehavilland DHC-2 MK. I(L20A) · Twin Hills, AKThe pilot’s loss of control during initial climb for reasons that could not be determined.NTSB ANC23LA027Accident · No injuriesClass 3 · LimitedFinal reportCessna 182R · Minto, AKA total loss of engine power for reasons that could not be determined.NTSB ANC22FA069Accident · 1 fatalClass 3 · FieldFinal reportStory Charles Brad TT FOX · Wasilla, AKThe pilot’s inability to maintain control of the airplane for reasons that could not be determined.NTSB ANC22LA054Accident · No injuriesClass 4 · LimitedFinal reportCessna 182D · McGrath, AKA nose landing gear collapse during landing for reasons that could not be determined based on the available information.NTSB ANC22FA047Accident · 1 fatalClass 3 · FieldFinal reportBell UH1B · Clear, AKA loss of control for reasons that could not be determined based on the available information.NTSB ANC22LA020Accident · Minor injuriesClass 3 · LimitedFinal reportPiper PA-18-135 · Wasilla, AKA partial loss of engine power for undetermined reasons.NTSB ANC22LA011Accident · No injuriesClass 3 · LimitedFinal reportLarry Bingham LB-1 · Haines, AKA partial loss of engine power for reasons that could not be determined based on available information, which resulted in a precautionary landing and impact with snow.NTSB ANC21LA096Accident · Minor injuriesClass 3 · LimitedFinal reportPiper PA-14 · Chickaloon, AKA total loss of engine power during takeoff for reasons that could not be determined based on the available information.NTSB ANC21LA047Accident · No injuriesClass 3 · LimitedFinal reportPiper J3C-65 · Sterling, AKA partial loss of engine power for reasons that could not be determined based on the available information.NTSB ANC21LA020Accident · 1 fatalClass 3 · LimitedFinal reportRobinson Helicopter R66 · Kodiak, AKAn impact with ocean waters for reasons that could not be determined based on the available information.NTSB ANC20LA083Accident · Minor injuriesClass 3 · LimitedFinal reportEurocopter AS350 · Ninilchik, AKA loss of engine power for an undetermined reason.NTSB ANC18FA071Accident · 2 fatalField investigationFinal reportPiper PA-12-150 · Healy, AKAn impact with terrain for reasons that could not be determined based on the available information.NTSB ANC18FA063Accident · 5 fatalField investigationFinal reportDe Havilland DHC-2 · Talkeetna, AKImpact with terrain for reasons that could not be determined because the airplane was not recovered due to the inaccessible nature of the accident site.NTSB ANC18FA050Accident · 2 fatalField investigationFinal reportPiper PA 18-150 · Delta Junction, AKUndetermined based on the available evidence.NTSB ANC18FA044Accident · 2 fatalClass 2 · FieldFinal reportPiper PA18 · Sitka, AKThe pilot's exceedance of the airplane's critical angle of attack for unknown reason, which resulted in an aerodynamic stall and a loss of control.NTSB ANC17LA016Accident · Serious injuriesLimited investigationFinal reportPiper PA18 · Sterling, AKThe pilot’s loss of control while maneuvering for reasons that could not be determined based on the available information.NTSB GAA17CA101Accident · No injuriesData collectionFinal reportMaule MX 7 · Willow, AKThe pilot’s failure to ensure that the runway was clear of any obstacles before departure, which resulted in the airplane impacting a snowdrift.NTSB ANC17FA010Accident · 4 fatalField investigationFinal reportPiper PA 28-180 · Port Alsworth, AKUndetermined due to a lack of physical evidence.NTSB ANC15LA073Accident · No injuriesLimited investigationFinal reportRobinson Helicopter R44 · Fort Glenn, AKThe separation of the tail rotor gearbox from the tailboom attachment point due to overstress loads imposed by a tail rotor blade imbalance as the result of impact with an undetermined object during low-level flight operations.NTSB GAA15LA281Accident · No injuriesLimited investigationFinal reportDehavilland DHC 2 MK.I · Nikolai, AKA loss of directional control during a water takeoff for reasons that could not be determined because the airplane was not examined due to the remote accident location.NTSB ANC14FA062Accident · 1 fatalField investigationFinal reportPiper PA-24-250 · Big Lake, AKThe pilot's impairment due to alcohol consumption, which resulted in his failure to maintain clearance from trees.NTSB ANC13FA004Accident · 1 fatalField investigationFinal reportGrumman Aircraft ENG C-1A · Willow, AKThe pilot’s loss of control of the airplane for reasons that could not be determined because the wreckage was not recovered from the accident site.NTSB ANC11LA080Accident · 2 fatalLimited investigationFinal reportPiper PA-18-150 · Cape Yakataga, AKA collision into water during initial climb after takeoff for undetermined reasons.