# NTSB investigations: Compressor bleed valve

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 WPR24LA070](https://openairdocs.org/ntsb/WPR24LA070.md): Air Tractor AT-502A · Stratford, CA · Accident · No injuries · Class 3 · Limited · Final report · Jan 10, 2024 · N6126U · Substantial damage
  > A partial loss of engine power due to the malfunction of the engine compressor bleed-off valve.
- [NTSB DCA17LA182](https://openairdocs.org/ntsb/DCA17LA182.md): Bombardier CL 600 2C10 · Denver, CO · Accident · No injuries · Class 3 · Limited · Final report · Jul 2, 2017 · N796SK · Substantial damage
  > The fuel supply tube fitting pulling out of the left engine’s operability bleed valve (OBV) during the landing rollout, allowing fuel to leak and contact hot engine cases, which ignited a fire that caused thermal damage to the engine pylon. Contributing to…
- [NTSB WPR17LA042](https://openairdocs.org/ntsb/WPR17LA042.md): Air Tractor AT 602 · Willows, CA · Accident · No injuries · Limited investigation · Final report · Dec 27, 2016 · N602L · Substantial damage
  > The decision of the maintenance facility mechanic to conduct maintenance without reference to the applicable manufacturer’s guidance, which resulted in the improper reassembly and subsequent failure of the engine compressor bleed valve, which in turn…
- [NTSB WPR16LA134](https://openairdocs.org/ntsb/WPR16LA134.md): Bell OH 58A · Brawley, CA · Accident · No injuries · Limited investigation · Final report · Jul 2, 2016 · N6251G · Substantial damage
  > The engine's degraded performance due to excessive wear of the engine bleed valve, which prevented it from closing during the accident flight. Contributing to the accident was the operator's failure to overhaul the bleed valve within 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 f.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_findings.parquet' f WHERE starts_with(f."findingCode", '01057532'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-findings/01057532/cases

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