# NTSB investigations: Allison 250 series, 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 ANC07LA062](https://openairdocs.org/ntsb/ANC07LA062.md): Hiller UH-12E · Skwentna, AK · Accident · No injuries · Limited investigation · Final report · Jul 10, 2007 · N146ET · Substantial damage
  > The pilot's failure to maintain clearance from a glacier, which resulted in a tail rotor strike during landing, and damage to the helicopter during an emergency descent/landing on rough/uneven terrain. Factors contributing to the accident were variable and…
- [NTSB ANC02LA081](https://openairdocs.org/ntsb/ANC02LA081.md): MBB BO-105S · Deadhorse, AK · Accident · No injuries · Limited investigation · Final report · Jul 23, 2002 · N491HL · Substantial damage
  > The pilot's failure to correct a settling-with-power condition during a helicopter landing flare/touchdown, resulting in a hard landing and roll over.
- [NTSB ANC83LA172](https://openairdocs.org/ntsb/ANC83LA172.md): Hiller-Soloy UH12E · Cape Yakataga, AK · Accident · No injuries · Limited investigation · Final report · Sep 15, 1983 · N3324F · Substantial damage
  > The helicopter rolled over during a forced landing on a beach after the engine quit. Discussions with the plt owner of the company verified that the acft had run out of fuel. The owner had warned his pilots to visually check fuel on the helicopters due to…
- [NTSB ANC78FA057](https://openairdocs.org/ntsb/ANC78FA057.md): Hiller UH12E3 · Livengood, AK · Accident · Minor injuries · Closed · Jul 23, 1978 · N9762C · Substantial damage
- [NTSB ANC76DAG17](https://openairdocs.org/ntsb/ANC76DAG17-150436.md): Hiller Acft UH-12E · Kenai, AK · Accident · No injuries · Closed · Jul 21, 1975 · N5359V · Destroyed
- [NTSB ANC75DAD06](https://openairdocs.org/ntsb/ANC75DAD06.md): Hiller Acft UH-12E · Ketchikan, AK · Accident · No injuries · Closed · May 12, 1975 · N107HA · Substantial damage
- [NTSB ANC75AA021](https://openairdocs.org/ntsb/ANC75AA021.md): Hiller Acft UH-12E · Ketchikan, AK · Accident · Minor injuries · Closed · Sep 1, 1974 · N112EC · Destroyed
- [NTSB ANC67A0006](https://openairdocs.org/ntsb/ANC67A0006.md): Hiller UH12E4 · Fairbanks, AK · Accident · No injuries · Closed · Jul 15, 1966 · N9762C · 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 ('03014', '03019'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=03014&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.