# NTSB investigations: Lycoming T-53 series: Loss of engine power

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 LAX97LA206](https://openairdocs.org/ntsb/LAX97LA206.md): Bell UH-1B · Heron, CA · Accident · No injuries · Limited investigation · Final report · Jun 11, 1997 · N888SJ · Destroyed
  > partial loss of engine power for undetermined reasons. A factor relating to the accident was that the engine lost power when the helicopter was outside (below) the limits of the height/velocity curve.
- [NTSB ATL93LA075](https://openairdocs.org/ntsb/ATL93LA075.md): Bell UH1F · Gatlinburg, TN · Accident · Minor injuries · Limited investigation · Final report · Apr 16, 1993 · N4040P · Substantial damage
  > The loss of engine power for unknown reasons.
- [NTSB BFO91DOA01](https://openairdocs.org/ntsb/BFO91DOA01.md): Bell UH-1B · Iaeger, WV · Accident · Minor injuries · Final report · Jul 1, 1991 · N91348 · Substantial damage
  > The loss of engine power for undetermined reasons, while operating over unsuitable terrain.
- [NTSB DEN87LA199](https://openairdocs.org/ntsb/DEN87LA199.md): Bell 204B · Dubois, WY · Accident · Serious injuries · Limited investigation · Final report · Jul 29, 1987 · N4580Y · Substantial damage
  > The commercial plt was performing external sling loads in support of seismic operations. The plt reported that the engine failed during a load release and the plt executed an autorotation. This resulted in a hard landing in heavy timber on sloping terrain.…

## 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."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41552', '41549', '41587')
    AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o.case_mkey = x.case_mkey AND o.aircrafts_position = x.position AND o."occurrenceNumber" = 1 AND o."occurrenceCode" = 350))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41552&occurrence=350

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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.