# NTSB investigations: Hydraulic, auxiliary system

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 DCA20LA100](https://openairdocs.org/ntsb/DCA20LA100.md): Sikorsky S61 · Camp Dwyer, Afghanistan · Accident · Serious injuries · Class 3 · Limited · Final report · Apr 20, 2020 · N908CH · Substantial damage
  > Fatigue cracking of the auxiliary servo cylinder’s pedal damper check valve housing and its bolts, which caused the sudden and uncommanded movement of the helicopter’s left pedal and a subsequent left yaw that continued until ground impact. Contributing to…
- [NTSB NYC08LA091](https://openairdocs.org/ntsb/NYC08LA091.md): North American Rockwell NA-265-80 · Ft. Lauderdale, FL · Accident · Minor injuries · Limited investigation · Final report · Feb 1, 2008 · N3RP · Substantial damage
  > The depletion of pressure in the normal hydraulic system for an undetermined reason, and the pilots' failure to properly operate the emergency braking system. Contributing to the accident was an inoperative hydraulic system aural warning.

## 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 f.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_findings.parquet' f WHERE starts_with(f."findingCode", '01022920'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-findings/01022920/cases

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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.