# NTSB investigations: Lycoming T-53 series: Loss of engine power(total) - mech failure/malf

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 SEA06LA162](https://openairdocs.org/ntsb/SEA06LA162.md): Kaman HH-43F · Metaline Falls, WA · Accident · 1 fatal · Limited investigation · Final report · Aug 18, 2006 · N559D · Destroyed
  > The failure of the left-hand cross-shaft input internal spline while the helicopter was in a hover, which resulted in the loss of gear box timing, in-flight blade contact and separation, and the subsequent loss of control and impact with a log deck.
- [NTSB LAX04LA015](https://openairdocs.org/ntsb/LAX04LA015.md): Bell UH-1B · Durham, CA · Accident · No injuries · Limited investigation · Final report · Oct 16, 2003 · N234SJ · Substantial damage
  > Separation of the power turbine shaft retaining bolt resulting in extensive power turbine area damage and a loss of shaft output power.
- [NTSB LAX99TA066](https://openairdocs.org/ntsb/LAX99TA066.md): Bell 205A-1 · Van Nuys, CA · Accident · Serious injuries · Final report · Jan 3, 1999 · N58126 · Substantial damage
  > A loss of engine power due to an undetermined component failure in the second stage power turbine nozzle area. Factors in the accident were the mountainous/hilly nature of the terrain and the dark night lighting conditions which precluded the pilot from…
- [NTSB SEA98FA104](https://openairdocs.org/ntsb/SEA98FA104.md): Garlick UH-1H · Couer D'Alene, ID · Accident · No injuries · Field investigation · Final report · Jun 18, 1998 · N869W · Substantial damage
  > Fatigue failure of a reduction drive planetary gear. Factors include an unapproved part and plating process, and uneven terrain at the emergency landing site.
- [NTSB ATL94LA180](https://openairdocs.org/ntsb/ATL94LA180.md): Bell UH-1B · Ozark, AL · Accident · Minor injuries · Limited investigation · Final report · Sep 29, 1994 · N41870 · Substantial damage
  > The failure of the engines' main bearings because of a lack of lubrication. A factor was the heavily wooded terrain.
- [NTSB ATL87LA121](https://openairdocs.org/ntsb/ATL87LA121.md): Bell UH-1B · Bay Minette, AL · Accident · No injuries · Limited investigation · Final report · Apr 21, 1987 · N88987 · Destroyed
  > During a logging operation, the helicopter experienced a complete engine failure shortly after attempting a pickup. The pilot entered an autorotative glide. The helicopter impacted the water and sank. The wreckage examination disclosed that the compressor…

## 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" = 351))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41552&occurrence=351

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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.