# NTSB investigations: Hiller UH-12D, WA

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 SEA88LA150](https://openairdocs.org/ntsb/SEA88LA150.md): Hiller UH-12E · Leavenworth, WA · Accident · No injuries · Limited investigation · Final report · Aug 10, 1988 · N62404 · Substantial damage
  > The PIC reported that during a practice helicopter autorotation to a power recovery, the pilot under instruction held the flare too long. The helicopter's tail guard and tail rotor struck the ground and the aircraft began to spin. The PIC reduced the throttle…
- [NTSB SEA87LA186](https://openairdocs.org/ntsb/SEA87LA186.md): Hiller UH-12E · Quincy, WA · Accident · Serious injuries · Limited investigation · Final report · Sep 12, 1987 · N8QA · Destroyed
  > During an aerial application maneuver the pilot flew into two 23,000 volt powerlines. The helicopter's rotor blades struck the powerlines, the aircraft turned to the right and descended to the ground.
- [NTSB SEA86LA089](https://openairdocs.org/ntsb/SEA86LA089.md): Hiller 12E · Walla Walla, WA · Accident · No injuries · Limited investigation · Final report · Mar 30, 1986 · N87595 · Destroyed
  > A catastrophic failure of the planetary gear of the transmission occurred about 51 flight hours after overhaul. During forced landing a hard landing occurred severing the tail boom. A fire then erupted.
- [NTSB SEA86LA062](https://openairdocs.org/ntsb/SEA86LA062.md): Hiller UH-12E · Odessa, WA · Accident · No injuries · Limited investigation · Final report · Feb 21, 1986 · N8542F · Destroyed
  > During an external load operation to remove groundwire off crossarms, the cable splice jammed in the pulley frame. The helicopters forward motion stopped and it then struck the ground. The pilot said the cargo hook release didn't work but no failures were…
- [NTSB SEA79AA029](https://openairdocs.org/ntsb/SEA79AA029.md): Hiller UH12D · Chehalis, WA · Accident · 1 fatal · Closed · Apr 3, 1979 · N64867 · Minor damage
- [NTSB SEA76FYC70](https://openairdocs.org/ntsb/SEA76FYC70.md): Hiller Acft UH-12D · Carson, WA · Accident · No injuries · Closed · Sep 20, 1976 · N62245 · 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."eventStateOrRegion" = 'WA' 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 ('4360118'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=4360118&state=WA

---
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.