# NTSB investigations, AK: Aircraft structural failure

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 DCA25LA061](https://openairdocs.org/ntsb/DCA25LA061.md): Lockheed 382G-44K-30 · St. Mary's, AK · Accident · No injuries · Class 3 · Limited · Final report · Dec 18, 2024 · N403LC · Substantial damage
  > The fatigue failure of the forward pressure bulkhead canted web that originated from stress corrosion cracking areas. Contributing to the failure were inspection procedures and intervals inadequate to identify the fatigue cracks.
- [NTSB ANC22LA040](https://openairdocs.org/ntsb/ANC22LA040.md): Cessna U206F · Kodiak, AK · Accident · No injuries · Class 3 · Limited · Final report · Jun 8, 2022 · N592KB · Substantial damage
  > The failure of the right main landing gear leg due to fatigue cracks that initiated from corrosion pitting.
- [NTSB ANC21FA015](https://openairdocs.org/ntsb/ANC21FA015.md): Cessna 185 · Chitina, AK · Accident · 2 fatal · Class 3 · Field · Final report · Feb 4, 2021 · N9725Z · Substantial damage
  > An in-flight breakup during cruise flight for reasons that could not be determined based on available evidence.
- [NTSB ANC20LA059](https://openairdocs.org/ntsb/ANC20LA059.md): Piper PA 12 · Anchorage, AK · Accident · No injuries · Class 3 · Limited · Final report · Jun 8, 2020 · N3188M · Substantial damage
  > The fatigue fracture of the American Iron and Steel Institute (AISI) 1025 carbon steel rudder post, which resulted in structural failure of the rudder. Contributing to the fatigue failure was the post’s susceptibility to fatigue cracking under normal service…
- [NTSB GAA18CA321](https://openairdocs.org/ntsb/GAA18CA321.md): Dehavilland Beaver DHC 2 · Ketchikan, AK · Accident · Minor injuries · Data collection · Final report · Jun 1, 2018 · N203KL · Substantial damage
  > The pilot’s failure to maintain pitch and directional control during a water landing.
- [NTSB ANC16LA048](https://openairdocs.org/ntsb/ANC16LA048.md): Stinson 108 · Haines, AK · Accident · No injuries · Limited investigation · Final report · Jul 18, 2016 · N343C · Substantial damage
  > The pilot’s failure to maintain directional control of the airplane during the landing roll with a quartering tailwind, which resulted in a ground loop and overstress failure of the left main landing gear wheel axle.
- [NTSB DCA16LA096](https://openairdocs.org/ntsb/DCA16LA096.md): Lockheed 382G · Iliamna, AK · Accident · No injuries · Limited investigation · Final report · Feb 12, 2016 · N401LC · Substantial damage
  > The fatigue failure of the forward pressure bulkhead canted web that originated from stress corrosion cracking areas. Contributing to the failure were inspection procedures and intervals inadequate to identify the crack.
- [NTSB ENG14IA016](https://openairdocs.org/ntsb/ENG14IA016.md): Douglas C 118A · Emmonak, AK · Incident · No injuries · Incident investigation · Final report · Feb 25, 2014 · N351CE · Minor damage
  > The fatigue failure of the lower wing skin due to aging mechanisms. Contributing to the failure were lower wing skin inspection procedures insufficient to identify the crack.
- [NTSB ANC12FA066](https://openairdocs.org/ntsb/ANC12FA066.md): Piper PA-32R-301 · Fairbanks, AK · Accident · 2 fatal · Field investigation · Final report · Jul 19, 2012 · N432LT · Destroyed
  > The noninstrument-rated pilot's decision to continue visual flight into instrument meteorological conditions likely leading to spatial disorientation, which resulted in a loss of airplane control and in-flight structural failure.
- [NTSB ANC10LA081](https://openairdocs.org/ntsb/ANC10LA081.md): Stinson 108-2 · Port Alsworth, AK · Accident · No injuries · Limited investigation · Final report · Aug 29, 2010 · N9569K · Substantial damage
  > The overstress fracture and failure of a main landing gear wheel during landing, resulting in the right wing striking the ground.
- [NTSB ANC10CA051](https://openairdocs.org/ntsb/ANC10CA051.md): Stinson 108-1 · Galena, AK · Accident · No injuries · Data collection · Final report · Jun 8, 2010 · N136SP · Substantial damage
  > The pilot's failure to maintain directional control during takeoff, resulting in a ground-loop, and collapse of the right main landing gear.
- [NTSB ANC10LA026](https://openairdocs.org/ntsb/ANC10LA026.md): Cessna 170B · Anchorage, AK · Accident · No injuries · Limited investigation · Final report · Mar 17, 2010 · N3492C · Substantial damage
  > The structural failure of the right main landing gear leg, resulting in the collapse of the landing gear.
- [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.

## 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" = '337' 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/337/sequence?state=AK

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