# NTSB investigations: Allison 250 SER 400HP, 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 LAX08FA233](https://openairdocs.org/ntsb/LAX08FA233.md): Hughes 369D · Price, UT · Accident · 3 fatal · Field investigation · Final report · Jul 19, 2008 · N400BE · Destroyed
  > The pilot's inadequate preflight performance planning for the takeoff and the loading that exceeded the lift performance capability of the helicopter.
- [NTSB DEN05LA056](https://openairdocs.org/ntsb/DEN05LA056.md): Hughes 369HS · Provo, UT · Accident · No injuries · Limited investigation · Final report · Feb 3, 2005 · N9118F · Substantial damage
  > the pilot's improper in-flight planning and decision making, his failure to maintain terrain clearance, and the total failure of the tail rotor drive shaft as a result of the tail rotor strike.
- [NTSB DEN89FA101](https://openairdocs.org/ntsb/DEN89FA101.md): Bell 206B-III · Park City, UT · Accident · No injuries · Field investigation · Final report · Apr 5, 1989 · N16733 · Substantial damage
  > An encounter with strong down-slope winds and gusts during a critiacal phase of flight which caused power required to exceed power available. Contributing factors to the accident was the downhill terrain and the downdraft conditions.
- [NTSB DEN89LA059](https://openairdocs.org/ntsb/DEN89LA059.md): Bell 206B III · Park City, UT · Accident · No injuries · Limited investigation · Final report · Jan 8, 1989 · N16733 · Substantial damage
  > The selection of an unsuitable landing site by the pilot, resulting in tail rotor contact with the terrain and shearing of the tail rotor driveshaft.
- [NTSB DEN82DTM06](https://openairdocs.org/ntsb/DEN82DTM06.md): Bell 206B · Fruitland, UT · Accident · No injuries · Closed · Dec 3, 1981 · N4717R · 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" = '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 ('03013', '03012'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=03013&state=UT

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