# NTSB investigations: Allison 250-C20 series, 1998

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 CHI98TA354](https://openairdocs.org/ntsb/CHI98TA354.md): Bell 206B-3 · Hinkley, MN · Accident · No injuries · Final report · Sep 12, 1998 · N52BH · Substantial damage
  > Loss of engine power due to failure of the engine governor.
- [NTSB LAX98LA200](https://openairdocs.org/ntsb/LAX98LA200.md): Hughes 369HS · Pacific Ocean (Pacific Ocean) · Accident · 2 fatal · Limited investigation · Final report · Jun 16, 1998 · N95MS · Destroyed
  > The improper shimmying of the tail rotor driveshaft by maintenance personnel which induced fatigue in the tail rotor driveshaft coupling causing it to fail, which resulted in a loss of tail rotor control. A factor is the failure of the pilot to recognize the…
- [NTSB FTW98LA235](https://openairdocs.org/ntsb/FTW98LA235.md): Bell 206BIII · Hurst, TX · Accident · No injuries · Limited investigation · Final report · May 21, 1998 · N206TA · Substantial damage
  > The pilot's delayed recovery from a simulated autorotative landing.
- [NTSB LAX98TA123](https://openairdocs.org/ntsb/LAX98TA123.md): Bell 206B · Santa Clarita, CA · Accident · No injuries · Final report · Mar 20, 1998 · N3186L · Substantial damage
  > The failure of the pilot to maintain adequate clearance with the wires. Additional factors in this accident are the position of the sun at that time of the day, which made it difficult to see the wires, and the lack of markings or poles for that series of…

## 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") = 1998
  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=1998

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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.