# NTSB investigations: Lycoming VO-540-C2A

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 CEN26LA175](https://openairdocs.org/ntsb/CEN26LA175.md): Hiller UH-12E · Chickasha, OK · Accident · No injuries · Class 3 · Limited · Preliminary report · Apr 30, 2026 · N22SP · Substantial damage
  > On April 30, 2026, about 1730 central daylight time, a Hiller UH-12E, N22SP, was substantially damaged when it was involved in an accident near Chickasha, Oklahoma. The pilot was not injured. The helicopter was operated as a Title 14 Code of Federal…
- [NTSB CHI88DER06](https://openairdocs.org/ntsb/CHI88DER06.md): Hiller UH-12E · Buffalo Lake, MN · Accident · No injuries · Final report · Jul 30, 1988 · N173HA · Destroyed
  > When the helicopter lifted off, the left tail rotor cable separated. Directional control was lost and the aircraft collided with the terrain. The pilot reported no injuries, however the helicopter sustained substantial damage. An inspection of the left tail…
- [NTSB MKC83LA207](https://openairdocs.org/ntsb/MKC83LA207.md): Hiller UH-12E · Corwith, IA · Accident · Minor injuries · Limited investigation · Final report · Aug 31, 1983 · N173HA · Destroyed
  > While en route, the plt heard a clanking noise behind him which was followed by a severe vibration of the flt controls. He initiated an autorotative descent from 3000 ft. he said the helicopter began to roll left, then righted itself. The helicopter touched…
- [NTSB DEN67A0071](https://openairdocs.org/ntsb/DEN67A0071.md): Hiller UH-12L · Fairplay, CO · Accident · No injuries · Closed · May 23, 1967 · N90457 · Substantial damage

## 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.engine_model_code IN ('42244'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=42244

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