# NTSB investigations, AK: Part(s) separation from AC

NTSB aviation accident and incident investigations since 1962: the probable cause, findings, aircraft, crew, weather and docket of each, linked to the FAA registry and the FAA’s own reports.

## Latest cases

- [NTSB ANC25LA027](https://openairdocs.org/ntsb/ANC25LA027.md): Pilatus PC-12/45 · Sleetmute, AK · Accident · No injuries · Class 3 · Limited · Preliminary report · Mar 8, 2025 · N304PT · Substantial damage
  > On March 7, 2025, about 1740 Alaska standard time, a Pilatus PC-12 airplane, N304PT, sustained substantial damage when it was involved in an accident near Sleetmute, Alaska. The pilot and nine passengers were not injured. The airplane was operated as a Title…
- [NTSB ANC24FA029](https://openairdocs.org/ntsb/ANC24FA029.md): Douglas C54D · Fairbanks, AK · Accident · 2 fatal · Class 3 · Field · Final report · Apr 23, 2024 · N3054V · Destroyed
  > A 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 ANC23LA071](https://openairdocs.org/ntsb/ANC23LA071.md): Bell Helicopter Textron Canada 206L-4 · King Salmon, AK · Accident · Minor injuries · Class 3 · Limited · Final report · Sep 5, 2023 · N193AL · 2 aircraft · Substantial damage
  > The failure of both pilots to see and avoid while en route, which resulted in a midair collision.
- [NTSB ANC20LA098](https://openairdocs.org/ntsb/ANC20LA098.md): Cessna 182 · King Salmon, AK · Accident · No injuries · Class 3 · Limited · Final report · Sep 21, 2020 · N182KT · Substantial damage
  > The fatigue fracture failure of the left main landing gear U-bolt during landing, which resulted in the collapse and separation of the left main landing gear spring.
- [NTSB ANC20LA089](https://openairdocs.org/ntsb/ANC20LA089.md): Eurocopter AS 350 · Fort Greely, AK · Accident · No injuries · Class 3 · Limited · Final report · Sep 6, 2020 · N354PA · Substantial damage
  > Failure of the door lock due to interference between the door and a cargo box.
- [NTSB ANC20LA064](https://openairdocs.org/ntsb/ANC20LA064.md): Piper PA22 · Soldotna, AK · Accident · No injuries · Class 3 · Limited · Final report · Jul 4, 2020 · N3604A · Substantial damage
  > The delamination of the fabric material from the fuselage above the windscreen due to failed adhesive, which resulted in disrupted airflow and a subsequent hard landing.
- [NTSB ANC19LA024](https://openairdocs.org/ntsb/ANC19LA024.md): Aeronca 7DC · Nome Creek, AK · Accident · No injuries · Class 3 · Limited · Final report · Jun 12, 2019 · N83391 · Substantial damage
  > The failure of the airplane's structural tubing due to corrosion, which resulted in a tailwheel separation and a subsequent loss of control. Also causal was the mechanic's failure to perform a detailed inspection of the aft fuselage during the most recent…
- [NTSB ANC18LA067](https://openairdocs.org/ntsb/ANC18LA067.md): Cessna U206 · Pedro Bay, AK · Accident · No injuries · Limited investigation · Final report · Aug 18, 2018 · N441GR · Substantial damage
  > The fatigue fracture of both main landing gear legs during the landing roll, which resulted in the collapse and separation of both main landing gear legs.
- [NTSB GAA18CA488](https://openairdocs.org/ntsb/GAA18CA488.md): Cessna 185 · Brooks Range, AK · Accident · No injuries · Data collection · Final report · Aug 12, 2018 · N62882 · Substantial damage
  > The airplane's encounter with downdraft conditions during takeoff, which resulted in a subsequent loss of altitude and collision with terrain.
- [NTSB ANC18LA030](https://openairdocs.org/ntsb/ANC18LA030.md): Champion 7GC · Anchorage, AK · Accident · No injuries · Limited investigation · Final report · Mar 26, 2018 · N4844E · Substantial damage
  > The pilot's failure to maintain directional control during landing with a crosswind, which resulted in a loss of control and failure of the main landing gear. Contributing to the accident was the pilot's self-induced pressure to land.
- [NTSB ANC17LA052](https://openairdocs.org/ntsb/ANC17LA052.md): Cessna A185 · Aniak, AK · Accident · No injuries · Limited investigation · Final report · Aug 18, 2017 · N92DC · Substantial damage
  > The pilot's inadequate preflight inspection, which failed to detect a crack in the propeller blade, which led to the separation of a section of a propeller blade due to fatigue.
- [NTSB ANC16LA072](https://openairdocs.org/ntsb/ANC16LA072.md): Helio H-250 · Anchorage, AK · Accident · No injuries · Limited investigation · Final report · Sep 26, 2016 · N6324V · Substantial damage
  > The fatigue fracture failure of both main landing gear (MLG) legs during the landing roll, which resulted in the collapse and separation of both MLG legs.
- [NTSB ANC16CA049](https://openairdocs.org/ntsb/ANC16CA049.md): Cessna U206 · Cordova, AK · Accident · No injuries · Data collection · Final report · Jul 20, 2016 · N1222V · Substantial damage
  > The pilot's improper landing flare, which resulted in a hard landing and subsequent landing gear separation and collapse.
- [NTSB ANC16LA046](https://openairdocs.org/ntsb/ANC16LA046.md): Cessna A185 · Illiamna, AK · Accident · No injuries · Limited investigation · Final report · Jul 19, 2016 · N85CF · Substantial damage
  > The overstress fracture of the left main landing (MLG) gear axle attachment bolts and the subsequent separation of the left MLG wheel, which resulted in the pilot’s inability to control the airplane.
- [NTSB ANC16LA024](https://openairdocs.org/ntsb/ANC16LA024.md): Cessna 180 · Naknek, AK · Accident · No injuries · Limited investigation · Final report · May 3, 2016 · N6479X · Substantial damage
  > The overstress fracture and subsequent separation of the left main landing gear axle due to a hard landing, which resulted in the pilot’s inability to maintain directional control of the airplane.
- [NTSB ANC15LA073](https://openairdocs.org/ntsb/ANC15LA073.md): Robinson Helicopter R44 · Fort Glenn, AK · Accident · No injuries · Limited investigation · Final report · Sep 19, 2015 · N7162R · Substantial damage
  > The 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 ANC14LA056](https://openairdocs.org/ntsb/ANC14LA056.md): Piper PA-22 · Dillingham, AK · Accident · No injuries · Limited investigation · Final report · Jul 28, 2014 · N8883C · Substantial damage
  > The pilot’s failure to maintain directional control during the landing due to his decision to attempt a landing with a quartering tailwind, which resulted in a ground loop and impact with the runway surface.
- [NTSB ANC09LA083](https://openairdocs.org/ntsb/ANC09LA083.md): Cessna 185 · McCarthy, AK · Accident · No injuries · Limited investigation · Final report · Aug 16, 2009 · N8209U · Substantial damage
  > The separation of the right main landing gear wheel from the airplane during landing for undetermined reasons, which resulted in an inability to control the airplane.
- [NTSB ANC09CA048](https://openairdocs.org/ntsb/ANC09CA048.md): Piper PA-32-301 · Birchwood, AK · Accident · No injuries · Data collection · Final report · May 16, 2009 · N8374T · Substantial damage
  > The failure of maintenance personnel to properly maintain the cargo door latch, resulting in an in-flight opening and separation of the cargo door, and substantial damage to the horizontal stabilator when it was struck by remnants of the cargo door.

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
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" = '338' 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
```

This list as a web page: https://openairdocs.org/ntsb-events/338/sequence?state=AK

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