# NTSB investigations: Pump, main

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 ERA22LA005](https://openairdocs.org/ntsb/ERA22LA005.md): Cessna 210 · Columbia, SC · Accident · No injuries · Class 4 · Limited · Final report · Oct 5, 2021 · N6318B · Substantial damage
  > A failure of the landing gear hydraulic power pack for reasons that could not be determined.
- [NTSB WPR20LA288](https://openairdocs.org/ntsb/WPR20LA288.md): Cessna 210 · Chino, CA · Accident · No injuries · Class 3 · Limited · Final report · Aug 26, 2020 · N9540T · Substantial damage
  > The failure of the engine-driven hydraulic pump, which resulted in the main landing gear not fully extending and locking into place during landing. Contributing to the accident was the failure of the emergency gear extension system for reasons that could not…
- [NTSB ENG20LA031](https://openairdocs.org/ntsb/ENG20LA031.md): Airbus Helicopters AS350 · Clewiston, FL · Incident · No injuries · Class 3 · Limited · Final report · May 3, 2020 · N1WT · No damage
  > Seizure of the hydraulic pump pulley bearing due to its improper installation by the manufacturer, leading to a failure of the hydraulic pump belt and the resultant partial loss of hydraulic assistance to the pedals.
- [NTSB ANC18LA043](https://openairdocs.org/ntsb/ANC18LA043.md): Cessna 210 · Ramona, CA · Accident · No injuries · Class 3 · Limited · Final report · Jun 1, 2018 · N9410M · Substantial damage
  > The failure of the engine-driven hydraulic pump due to the installation of improper cap screws, which resulted in a gap in the pump housing, a subsequent hydraulic leak, and the landing gear collapsing.
- [NTSB CEN13IA059](https://openairdocs.org/ntsb/CEN13IA059.md): Fairchild SA227-AC · Minneapolis, MN · Incident · No injuries · Incident investigation · Final report · Nov 10, 2012 · N619BA · Minor damage
  > Loose electrical connections to the hydraulic system and anomalies in the hydraulic shuttle valve and power pack, which resulted in an uncommanded gear unlock and collapse of the left main landing gear. Contributing to the accident was the operator’s failure…
- [NTSB CEN11IA379](https://openairdocs.org/ntsb/CEN11IA379.md): Bombardier CL-600-2B19 · Milwaukee, WI · Incident · No injuries · Incident investigation · Final report · Jun 7, 2011 · N866AS · Minor damage
  > The failure of the right main landing gear (MLG) to extend normally, which resulted from the combination of a slightly worn uplock pin, the operation of the hydraulic pumps below their specified operating pressures, and contamination within the landing gear…
- [NTSB CEN09IA618](https://openairdocs.org/ntsb/CEN09IA618.md): Bell 230 · Peoria, IL · Incident · No injuries · Incident investigation · Final report · Jul 1, 2009 · N880SF · No damage
  > The loss of the number one hydraulic system fluid and hydraulic pressure during cruise due to the failure of the bolts that secure the hydraulic pump's cover.

## 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", '01022913'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-findings/01022913/cases

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