# NTSB investigations: Lycoming VO-540 series, WY

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 WPR09LA028](https://openairdocs.org/ntsb/WPR09LA028.md): Hiller UH-12E · Powder River, WY · Accident · Minor injuries · Limited investigation · Final report · Oct 30, 2008 · N61436 · Substantial damage
  > A flight control system malfunction while the helicopter was maneuvering at low altitude due to the failure/separation of the rotor blade control tube.
- [NTSB DEN80DTC28](https://openairdocs.org/ntsb/DEN80DTC28.md): Hiller UH-12E · Greybull, WY · Accident · No injuries · Closed · Aug 8, 1980 · N5389V · Substantial damage
- [NTSB DEN67A0002](https://openairdocs.org/ntsb/DEN67A0002-171116.md): Hiller UH12E · Greybull, WY · Accident · Minor injuries · Closed · Jul 7, 1966 · N9754C · Substantial damage
- [NTSB DEN66A0084](https://openairdocs.org/ntsb/DEN66A0084.md): Hiller UH-12E · Lonetree, WY · Accident · No injuries · Closed · May 21, 1966 · N9754C · Substantial damage
- [NTSB DEN66A0004](https://openairdocs.org/ntsb/DEN66A0004.md): Hiller UH-12E · Meeteetse, WY · Accident · No injuries · Closed · Jul 7, 1965 · N5343V · Destroyed

## 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" = 'WY' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41534', '41582'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41534&state=WY

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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.