# Fatal NTSB investigations: Lycoming T-55 SER TS

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 ANC93FA033](https://openairdocs.org/ntsb/ANC93FA033.md): Bell 214B1 · Ketchikan, AK · Accident · 2 fatal · Field investigation · Final report · Feb 19, 1993 · N114CR · Destroyed
  > Inadequate maintenance of the hydraulic servo actuator which led to the fatigue failure and loss of flight control. In addition, the flightcrew did not, or was unable to, jettison the external load. Factors which contributed to the accident were: the pilot…
- [NTSB DEN81FA029](https://openairdocs.org/ntsb/DEN81FA029.md): Bell UH-1B · Williston, ND · Accident · 8 fatal · Closed · May 1, 1981 · N46942 · Destroyed
- [NTSB SEA76OS004](https://openairdocs.org/ntsb/SEA76OS004.md): Bell 205A-1 · Celtiberia, Peru · Accident · 1 fatal · Closed · Nov 18, 1975 · N59438 · 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."highestInjuryLevel" = 'Fatal'
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41555'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41555&fatal=1

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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.