# NTSB investigations: Williams Helicopter UH-1H

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 WPR24LA299](https://openairdocs.org/ntsb/WPR24LA299.md): Williams Helicopter UH-1H · Colusa, CA · Accident · Serious injuries · Class 4 · Limited · Final report · Aug 30, 2024 · N710WD · Substantial damage
  > The pilot’s failure to set collective friction which resulted in collective bounce and subsequent loss of control.
- [NTSB WPR18LA004](https://openairdocs.org/ntsb/WPR18LA004.md): Western International Avia UH 1H · Arbuckle, CA · Accident · No injuries · Class 3 · Limited · Final report · Oct 13, 2017 · N247PV · Substantial damage
  > A collective control malfunction for reasons that could not be determined.
- [NTSB WPR14LA206](https://openairdocs.org/ntsb/WPR14LA206.md): Williams Helicopter UH 1H · Waitsburg, WA · Accident · Minor injuries · Limited investigation · Final report · May 23, 2014 · N260TA · Substantial damage
  > An extreme vibration immediately after entering forward flight for reasons that could not be determined because postaccident examination of the helicopter did not reveal any anomalies that would have precluded normal operation. Contributing to the accident…
- [NTSB WPR12LA039](https://openairdocs.org/ntsb/WPR12LA039.md): Williams Helicopter UH-1H · Grand Canyon, AZ · Accident · Serious injuries · Limited investigation · Final report · Nov 15, 2011 · N502AW · Substantial damage
  > The loss of main rotor power due to a main rotor transmission failure from a lack of lubrication.
- [NTSB LAX06LA134](https://openairdocs.org/ntsb/LAX06LA134.md): Bell UH-1H · Yuba City, CA · Accident · No injuries · Limited investigation · Final report · Apr 1, 2006 · N710WD · Substantial damage
  > The pilot's in-flight loss of control of the helicopter for undetermined reasons. A factor was the trees.
- [NTSB SEA01TA172](https://openairdocs.org/ntsb/SEA01TA172.md): Bell 205 · Troy, MT · Accident · No injuries · Final report · Sep 17, 2001 · N458CC · Substantial damage
  > The pilot-in-command's failure to maintain seperation/clearance from trees while maneuvering.

## 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.aircraft_model_code IN ('9790870'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=9790870

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