# NTSB investigations: Williams Helicopter UH-1H, CA

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 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.

## 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."eventStateOrRegion" = 'CA' AND c."eventCountry" = 'USA'
  AND 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&state=CA

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