# NTSB investigations: Allison 250-C20 series, 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 LAX90FA060](https://openairdocs.org/ntsb/LAX90FA060.md): McDonnell Douglas 369E · Santa Rosa, CA · Accident · 1 fatal · Field investigation · Final report · Dec 29, 1989 · N1604L · Destroyed
  > The pilot's improper preflight planning/decision which resulted in the loss of tail rotor effectiveness. Contributing to the accident was the pilot allowing the maximum gross weight of the aircraft to be exceeded, and the tailwind.
- [NTSB DEN90T#A01](https://openairdocs.org/ntsb/DEN90T%23A01.md): MBB BO-105S · Mercury, NV · Accident · No injuries · Class 3 · Final report · Oct 2, 1989 · N7EG · Substantial damage
- [NTSB LAX89LA297](https://openairdocs.org/ntsb/LAX89LA297.md): Bell 206B · Murrieta, CA · Accident · No injuries · Limited investigation · Final report · Sep 6, 1989 · N111JG · Substantial damage
  > A partial loss of engine power due to contaminates in the fuel control unit. The origin of the contaminates was not determined. Contributing factor(s) was: the helicopter was not equipped with floats.
- [NTSB LAX89LA141](https://openairdocs.org/ntsb/LAX89LA141.md): Hughes 369D · Vallejo, CA · Accident · No injuries · Limited investigation · Final report · Mar 31, 1989 · N5108E · Substantial damage
  > Fatigue failure of a defective pc tube assembly resulting in a loss of engine power. A contributing factor was the unsuitable terrain.
- [NTSB LAX89FA136](https://openairdocs.org/ntsb/LAX89FA136.md): Aerospatiale AS-355-F · Bear Valley, CA · Accident · No injuries · Field investigation · Final report · Mar 26, 1989 · N84MH · Substantial damage
  > Improper in-flight planning/decision by the pilot, which resulted in a loss of aircraft control during a slow speed, downwind approach to a high altitude stolport. Contributing factors were: high density altitude, tailwind, improper weather evaluation by the…
- [NTSB DEN89LA090](https://openairdocs.org/ntsb/DEN89LA090.md): Bell 222 · Leadville, CO · Accident · No injuries · Limited investigation · Final report · Mar 23, 1989 · N5008Q · Substantial damage
  > Failure of the pilot to compensate adequately for wind conditions with rudder pedals while maneuvering in unfavorable wind and high density altitude.
- [NTSB FTW89LA036](https://openairdocs.org/ntsb/FTW89LA036.md): Bell 206B-III · S.Timbalier 151 · Accident · Minor injuries · Limited investigation · Final report · Jan 3, 1989 · N22704 · Destroyed
  > A collision between the aircraft and the platform during the emergency autorotation which caused the left skid and float to separate and destabilized the autorotation. The collision was probably unadoidable due to the maneuver that was being conducted at 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") = 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 ('03020'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

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