# NTSB investigations: Lycoming VO-540 series, OR

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 SEA05CA104](https://openairdocs.org/ntsb/SEA05CA104.md): Hiller UH-12E · Estacada, OR · Accident · Minor injuries · Data collection · Final report · May 23, 2005 · N3030H · Substantial damage
  > The failure of the pilot to maintain landing skid clearance during hover taxi, which resulted in a dynamic rollover. A factor was the gusty wind condition.
- [NTSB SEA04LA073](https://openairdocs.org/ntsb/SEA04LA073.md): Hiller UH-12E · Haines, OR · Accident · Minor injuries · Limited investigation · Final report · Apr 26, 2004 · N9785C · Substantial damage
  > A momentary partial loss of power for undetermined reason(s) and the pilot's failure to maintain adequate RPM during his autorotation landing.
- [NTSB SEA02LA073](https://openairdocs.org/ntsb/SEA02LA073.md): Hiller UH-12E · Goshen, OR · Accident · No injuries · Limited investigation · Final report · Apr 22, 2002 · N3004T · Substantial damage
  > The failure of company maintenance personnel to identify and replace/repair the degraded exhaust stack. Contributing factors were the mis-rigged carburetor heat control and the pilot's failure to maintain appropriate rotor RPM. Additional contributing factors…
- [NTSB SEA94T#A01](https://openairdocs.org/ntsb/SEA94T%23A01.md): Hiller UH-12E · Eugene, OR · Accident · No injuries · Class 3 · Final report · May 6, 1994 · N94492 · Substantial damage
- [NTSB SEA85LA107](https://openairdocs.org/ntsb/SEA85LA107.md): Hiller UH-12E · Fall Creek, OR · Accident · No injuries · Limited investigation · Final report · May 5, 1985 · N28872 · Substantial damage
  > The helicopter sustained substantial damage during a forced landing following a loss of power. According to the plt, the helicopter was refueled aprx 1 hr flt time prior to the accident. Cause of the power loss was not determined.
- [NTSB SEA84LA174](https://openairdocs.org/ntsb/SEA84LA174.md): Hiller UH-12E · Redmond, OR · Accident · Minor injuries · Limited investigation · Final report · Jul 16, 1984 · N1043L · Substantial damage
  > The acft collided with the ground after a in-flt main rotor blade separation during an aerial application flt. Inspection of the fracture surface of the failed blade revealed characteristics consistant with the high stress, low cycle fatigue. Lab findings…
- [NTSB SEA84LA091](https://openairdocs.org/ntsb/SEA84LA091.md): Hiller UH-12E · Buxton, OR · Accident · No injuries · Limited investigation · Final report · Apr 19, 1984 · N56BA · Substantial damage
  > The helicopter entered an uncontrolled right roll while lifting off from a trailer & struck the ground with the m/r. the plt reported the trailer was not level.
- [NTSB SEA79FYM08](https://openairdocs.org/ntsb/SEA79FYM08.md): Hiller Acft Soloy · Lacomb, OR · Accident · No injuries · Closed · Dec 22, 1978 · N172ET · Substantial damage
- [NTSB SEA79FYM01](https://openairdocs.org/ntsb/SEA79FYM01.md): Hiller Acft UH-12E · Falls City, OR · Accident · No injuries · Closed · Oct 2, 1978 · N90476 · Substantial damage
- [NTSB SEA78DYA18](https://openairdocs.org/ntsb/SEA78DYA18.md): Hiller Acft UH-12E · Adrian, OR · Accident · No injuries · Closed · Jul 20, 1978 · N67696 · Destroyed
- [NTSB SEA78FYM06](https://openairdocs.org/ntsb/SEA78FYM06.md): Hiller Acft UH-12E · Depoe Bay, OR · Accident · Serious injuries · Closed · Nov 3, 1977 · N9786C · Substantial damage
- [NTSB SEA76FYC45](https://openairdocs.org/ntsb/SEA76FYC45.md): Hiller Acft UH-12E · Tillamook, OR · Accident · Serious injuries · Closed · May 14, 1976 · N9785C · Destroyed
- [NTSB SEA75FYC03](https://openairdocs.org/ntsb/SEA75FYC03.md): Hiller Acft UH-12E · Dayton, OR · Accident · No injuries · Closed · Jul 16, 1974 · N104HA · Substantial damage
- [NTSB SEA74FYC39](https://openairdocs.org/ntsb/SEA74FYC39.md): Hiller Acft UH-12E · Sublimity, OR · Accident · No injuries · Closed · Mar 18, 1974 · N9749C · Destroyed
- [NTSB SEA74FYC36](https://openairdocs.org/ntsb/SEA74FYC36.md): Hiller Acft UH-12E · Mt Hood, OR · Accident · No injuries · Closed · Mar 5, 1974 · N5367V · Substantial damage
- [NTSB SEA69D0181](https://openairdocs.org/ntsb/SEA69D0181.md): Hiller UH-12E · Brightwood, OR · Accident · No injuries · Closed · Dec 21, 1968 · N3820 · Substantial damage
- [NTSB SEA66A0066](https://openairdocs.org/ntsb/SEA66A0066.md): Hiller UH-12E · Huntington, OR · Accident · No injuries · Closed · Jun 13, 1966 · N9785C · 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" = 'OR' 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=OR

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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.