# NTSB investigations: Allison 250 SER 317HP, 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 ANC84LA071](https://openairdocs.org/ntsb/ANC84LA071.md): Bell 206L-1 · Mt Mckinley Vil, AK · Accident · No injuries · Limited investigation · Final report · May 16, 1984 · N1078N · Substantial damage
  > The helicopter experienced an engine failure while cruising at about 600 ft AGL. The pilot made a forced landing during which the main rotor blades collided with trees. Examination of the aircraft fuel system revealed that the check valves located in the fuel…
- [NTSB ANC76AA118](https://openairdocs.org/ntsb/ANC76AA118.md): Bell 206B · Eagle, AK · Accident · No injuries · Closed · Jun 28, 1976 · N2953W · Substantial damage
- [NTSB ANC73AA019](https://openairdocs.org/ntsb/ANC73AA019.md): Hughes 369S · Craig, AK · Accident · No injuries · Closed · Sep 13, 1972 · N9064F · 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 ('03011'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=03011&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.