# NTSB investigations: Allison 250 SER 400HP, 1989

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 NYC90FA029](https://openairdocs.org/ntsb/NYC90FA029.md): Hughes 369HS · North Adams, MA · Accident · 2 fatal · Field investigation · Final report · Nov 15, 1989 · N9208F · Destroyed
  > Failure of the pilot-in-command (PIC) to assure proper rotor RPM and proper operation of the flight controls during an approach in gusty wind conditions. A factor related to the accident was: the pic's lack of experience in the type of operation.
- [NTSB FTW89LA150](https://openairdocs.org/ntsb/FTW89LA150.md): Bell 206B · Oak Grove, LA · Accident · No injuries · Limited investigation · Final report · Aug 19, 1989 · N5006N · Substantial damage
  > Pilot's improper emergency procedures and flare that led to a hard landing and roll over. Factors in the accident were the pilot's decision to initiate an autorotation following an undetermined event and failure to maintain directional control during the…
- [NTSB NYC89LA171](https://openairdocs.org/ntsb/NYC89LA171.md): Hughes 369HS · Niagara Falls, NY · Accident · No injuries · Limited investigation · Final report · May 30, 1989 · N9238F · Substantial damage
  > Failure of the pilot to see and avoid the cables.
- [NTSB FTW89FA075](https://openairdocs.org/ntsb/FTW89FA075.md): Bell 206B · West Cameron · Accident · No injuries · Field investigation · Final report · Apr 5, 1989 · N5004L · Substantial damage
  > Inadequate maintenance/inspection of the aircraft fuel system by company maintenance personnel and fuel contamination, which resulted in a partial loss of engine power. Related factors were: a binding (stuck) fuel filter cap bypass valve and partial failure…
- [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 ATL89FA112](https://openairdocs.org/ntsb/ATL89FA112.md): Bell 206B · Atlanta, GA · Accident · Serious injuries · Field investigation · Final report · Mar 22, 1989 · N5004F · Substantial damage
  > Fatigue failure of the engine spur adapter gearshaft in an area where there was a lack of lubrication (oil starvation) due to a partially blocked oil delivery tube. Contributing factors were: inattentive maintenance or servicing of the aircraft by unknown…
- [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.

## 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 year(c."eventDate") = 1989
  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&year=1989

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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.