# NTSB investigations: Allison 250-C20 series, 1988

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 ATL89FA051](https://openairdocs.org/ntsb/ATL89FA051.md): Bell 206B · Pinson, AL · Accident · No injuries · Field investigation · Final report · Dec 2, 1988 · N3TV · Substantial damage
  > Two FAA inspectors were conducting currency training when the helicopter landed hard during a practice power recovery autorotation. The pilot had delayed in applying power and collective pitch. Upon contact with the ground, all engine instruments indicated…
- [NTSB LAX88LA322](https://openairdocs.org/ntsb/LAX88LA322.md): Hughes 369HS · Columbia, CA · Accident · No injuries · Limited investigation · Final report · Sep 16, 1988 · N9110F · Substantial damage
  > During an external load operation, there was an indication of high torque and the oil chip light illuminated. The engine lost power and the pilot initiated an autorotation. The helicopter collided with the sloping terrain and rolled over. Inspection of the…
- [NTSB NYC88LA201](https://openairdocs.org/ntsb/NYC88LA201.md): Bell 206B · Plymouth, MA · Accident · No injuries · Limited investigation · Final report · Jul 13, 1988 · N543CC · Substantial damage
  > A loss of power to the engine because the fuel control was not properly adjusted and collision with terrain due to an unsuitable landing area.
- [NTSB LAX88LA179](https://openairdocs.org/ntsb/LAX88LA179.md): McDonnell Douglas 369D · Waialua, HI · Accident · Serious injuries · Limited investigation · Final report · May 13, 1988 · N4943T · Destroyed
  > Failure to follow procedures established by the manufacture for uncommanded trim inputs and his decision to make a hover approach to landing.
- [NTSB LAX88LA136](https://openairdocs.org/ntsb/LAX88LA136.md): Bell 206B · Honolulu, HI · Accident · No injuries · Limited investigation · Final report · Mar 18, 1988 · N2995W · Substantial damage
  > After touchdown the plt reduced the throttle and removed his left hand from the throttle/collective pitch control to retune the radio. His attention was directed to the frequency indicator during the procedure. The helicopter became airborne and moved to the…

## 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") = 1988
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('03020'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=03020&year=1988

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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.