# NTSB investigations: Lycoming T-53 series, ID

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 WPR10FA295](https://openairdocs.org/ntsb/WPR10FA295.md): Kaman Aerospace K-1200 · Donnelly, ID · Accident · 1 fatal · Field investigation · Final report · Jun 16, 2010 · N134WC · Substantial damage
  > The collision of two counter-rotating main rotor blades for undetermined reasons, which resulted in a loss of control.
- [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 SEA98FA077](https://openairdocs.org/ntsb/SEA98FA077.md): Garlick UH-1H · Hope, ID · Accident · No injuries · Field investigation · Final report · May 19, 1998 · N98NW · Substantial damage
  > Failure of a misaligned main bearing in the engine. Factors include returning a previously unairworthy-tagged engine to service by the operator's maintenance personnel without sufficient information to identify and correct an unknown engine deficiency.
- [NTSB SEA96FA187](https://openairdocs.org/ntsb/SEA96FA187.md): Garlick UH-1H · Coeur D'Alene, ID · Accident · Serious injuries · Field investigation · Final report · Aug 12, 1996 · N97NW · Substantial damage
  > Fatigue fracture of the left forward vertical stabilizer spar, resulting in loss of the vertical stabilizer and tail rotor and subsequent loss of control. A factor was insufficient applicability (by make and model) of an existing FAA airworthiness directive…
- [NTSB SEA93LA207](https://openairdocs.org/ntsb/SEA93LA207.md): Bell UH-1B · Pierce, ID · Accident · No injuries · Limited investigation · Final report · Sep 23, 1993 · N3979C · Substantial damage
  > Separation of the 90 degree gearbox after fatigue failure of the gearbox attach bolts. Factors include hilly/mountainous terrain.
- [NTSB SEA92T#A04](https://openairdocs.org/ntsb/SEA92T%23A04.md): Bell 205A-1 · Arco, ID · Accident · No injuries · Class 3 · Final report · Aug 3, 1992 · N66HJ · 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."eventStateOrRegion" = 'ID' AND c."eventCountry" = 'USA'
  AND 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'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

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

---
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.