# NTSB investigations: Franklin 6A-350SER, AK

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 ANC25LA059](https://openairdocs.org/ntsb/ANC25LA059.md): Cessna 170B · Denali Park, AK · Accident · No injuries · Class 4 · Limited · Final report · Jun 25, 2025 · N2655D · Substantial damage
  > The failure of the left main landing gear spring due to a fatigue fracture during landing on uneven terrain.
- [NTSB ANC13CA101](https://openairdocs.org/ntsb/ANC13CA101.md): Cessna 170B · Iliamna, AK · Accident · No injuries · Data collection · Final report · Sep 14, 2013 · N2736C · Substantial damage
  > The pilot's inadvertent encounter with a mound while landing on a remote airstrip.
- [NTSB ANC03LA083](https://openairdocs.org/ntsb/ANC03LA083.md): Maule M-4 · Kobuk, AK · Accident · Minor injuries · Limited investigation · Final report · Jul 20, 2003 · N40344 · Substantial damage
  > The pilot's inadvertent use of diesel fuel in a gasoline engine which resulted in a partial loss of engine power, and subsequent collision with trees during a forced landing after takeoff. A factor contributing to the accident was the pilot's inadequate…
- [NTSB ANC91LA078](https://openairdocs.org/ntsb/ANC91LA078.md): Maule M4-220-C · Fairbanks, AK · Accident · No injuries · Limited investigation · Final report · Jun 21, 1991 · N40304 · Substantial damage
  > The pilot's failure to maintain airspeed during the initial climb and exceeding the gross weight of the airplane. Contributing to the accident was high vegetation.
- [NTSB ANC88LA143](https://openairdocs.org/ntsb/ANC88LA143.md): Maule M-4 · Cordova, AK · Accident · No injuries · Limited investigation · Final report · Sep 18, 1988 · N2044U · Substantial damage
  > While on base leg to the airport, the engine stopped producing power forcing the pilot to land the airplane on the tundra short of the runway. Upon landing the airplane nosed over. Subsequent examination of the engine showed water in the carburetor. The water…
- [NTSB ANC78FAA22](https://openairdocs.org/ntsb/ANC78FAA22-140259.md): Maule M-4 · North Pole, AK · Accident · Minor injuries · Closed · Jun 7, 1978 · N2062U · Substantial damage
- [NTSB ANC75DAA06](https://openairdocs.org/ntsb/ANC75DAA06.md): Maule M4180C · Fairbanks, AK · Accident · No injuries · Closed · Aug 27, 1974 · N2062U · Substantial damage

## 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 x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('27023'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=27023&state=AK

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OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.