# NTSB investigations: Allison 250 series, MT

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 GAA19CA261](https://openairdocs.org/ntsb/GAA19CA261.md): Siai-Marchetti SM · Belgrade, MT · Accident · No injuries · Data collection · Final report · May 13, 2019 · N772DW · Substantial damage
  > The pilot receiving instruction's overapplication of rudder during the landing roll and his subsequent failure to maintain directional control, which resulted in a ground loop.
- [NTSB SEA78FTA08](https://openairdocs.org/ntsb/SEA78FTA08.md): Bell 47G3B1 · Billings, MT · Accident · Minor injuries · Closed · Dec 20, 1977 · N7860S · Destroyed
- [NTSB SEA76FTI02](https://openairdocs.org/ntsb/SEA76FTI02.md): Bell 47G3B1 · Elliston, MT · Accident · No injuries · Closed · Jul 9, 1975 · N1170W · 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" = 'MT' 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=MT

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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.