# NTSB investigations: Allison T63-A-720, CA

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 WPR20LA247](https://openairdocs.org/ntsb/WPR20LA247.md): Bell OH58A · Holtville, CA · Accident · Minor injuries · Class 3 · Limited · Final report · Jul 31, 2020 · N901XV · Substantial damage
  > The total loss of engine power due to the decoupling of the engine's turbine and compressor sections, which resulted from improper maintenance.
- [NTSB WPR13LA087](https://openairdocs.org/ntsb/WPR13LA087.md): Bell OH-58C · Riverdale, CA · Accident · Serious injuries · Limited investigation · Final report · Jan 8, 2013 · N911PT · Substantial damage
  > A flight control malfunction while maneuvering for reasons that could not be determined because it was not possible to establish whether observed damage to the flight control assembly was the result of wreckage recovery efforts or a preexisting condition.
- [NTSB WPR11LA303](https://openairdocs.org/ntsb/WPR11LA303.md): Arrow Falcon Exporters OH-58C · Brentwood, CA · Accident · Serious injuries · Limited investigation · Final report · Jul 3, 2011 · N6264D · Substantial damage
  > The failure of the main rotor mast due to fatigue cracking originating from corrosion pits.

## 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" = 'CA' 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 ('03083'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=03083&state=CA

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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.