# NTSB investigations: AiResearch TSE331 series

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 WPR09LA371](https://openairdocs.org/ntsb/WPR09LA371.md): Sikorsky S-55 · Chelan, WA · Accident · No injuries · Limited investigation · Final report · Jul 24, 2009 · N1255T · Substantial damage
  > Failure of a seal in the hydraulic system resulting in a loss of hydraulic pressure while maneuvering at low altitude.
- [NTSB ATL02LA130](https://openairdocs.org/ntsb/ATL02LA130.md): Sikorsky S-55-QT · Orlando, FL · Accident · No injuries · Limited investigation · Final report · Jun 25, 2002 · N2300Z · Substantial damage
  > Failure of the cyclic lateral control rod end bearing, and subsequent dynamic rollover.
- [NTSB LAX00FA342](https://openairdocs.org/ntsb/LAX00FA342.md): Sikorsky/Orlando S-55 · Hoover Dam, AZ · Accident · Minor injuries · Field investigation · Final report · Sep 18, 2000 · N17754 · Substantial damage
  > **This report was modified on 2/23/2016. Please refer to the public docket for this accident for more information.** The failure of Papillon maintenance personnel to recognize the significance of the increasing metal in the oil analysis test results and the…

## 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 ('01505', '01520'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=01505

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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.