# NTSB investigations: Allison 250-C30 series, UT

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 SEA06CA161](https://openairdocs.org/ntsb/SEA06CA161.md): Bell 206L-3 · Salt Lake City, UT · Accident · No injuries · Data collection · Final report · Aug 11, 2006 · N206UH · Substantial damage
  > The failure of the pilot to maintain clearance by allowing the helicopter to drift backwards, resulting in its tail rotor striking a hangar.
- [NTSB SEA06LA121](https://openairdocs.org/ntsb/SEA06LA121.md): Bell 206L · Vernal, UT · Accident · Minor injuries · Limited investigation · Final report · Jun 15, 2006 · N265SH · Substantial damage
  > The loss of tail rotor effectiveness during an attempted precationary landing after a takeoff over uneven, sloping, brush-covered terrain. Factors include the pilot using the wrong performance chart while completing his preflight performance calculations, the…
- [NTSB SEA94LA073](https://openairdocs.org/ntsb/SEA94LA073.md): Bell 206 L-1 · Salt Lake City, UT · Accident · Minor injuries · Limited investigation · Final report · Feb 26, 1994 · N2752U · Substantial damage
  > The pilot's selection of unsuitable terrain for a landing site. Factors include snow covered terrain.

## 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" = 'UT' 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 ('03015'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=03015&state=UT

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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.