# NTSB investigations: Hiller UH-12E: Loss of engine power

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 LAX01LA245](https://openairdocs.org/ntsb/LAX01LA245.md): Hiller UH-12E · Blythe, CA · Accident · No injuries · Limited investigation · Final report · Jul 13, 2001 · N9281P · Substantial damage
  > The selection by the pilot of an unsuitable precautionary landing site on soft, uneven terrain, which resulted in a rollover.
- [NTSB LAX99LA237](https://openairdocs.org/ntsb/LAX99LA237.md): Hiller UH-12ET · Williams, CA · Accident · No injuries · Limited investigation · Final report · Jun 30, 1999 · N7173F · Substantial damage
  > The pilot's inadequate preflight planning and verification that fuel was available for the intended flight. A factor was the fuel quantity false indication.
- [NTSB SEA99LA031](https://openairdocs.org/ntsb/SEA99LA031.md): Hiller UH-12E · Tensed, ID · Accident · Serious injuries · Limited investigation · Final report · Jan 19, 1999 · N67264 · Substantial damage
  > The pilot-in-command's inadequate fuel management which resulted in fuel exhaustion. Contributing factors were the absence of cautionary markings on the fuel gauge, and high trees at the accident site.
- [NTSB CHI98LA312](https://openairdocs.org/ntsb/CHI98LA312.md): Hiller UH-12E · Shelton, NE · Accident · Serious injuries · Limited investigation · Final report · Aug 14, 1998 · N88782 · Substantial damage
  > The pilot mismanaged the fuel which led to fuel starvation and subsequent loss of engine power.
- [NTSB CHI98LA012](https://openairdocs.org/ntsb/CHI98LA012.md): Hiller UH-12E · Liberty, NE · Accident · No injuries · Limited investigation · Final report · Oct 9, 1997 · N4027L · Substantial damage
  > A loss of engine power for undetermined reasons.
- [NTSB LAX97LA179](https://openairdocs.org/ntsb/LAX97LA179.md): Hiller UH-12E · Truckee, CA · Accident · Serious injuries · Limited investigation · Final report · May 14, 1997 · N7082D · Substantial damage
  > A loss of engine power for undetermined reasons. A factor in the accident was the unsuccessful attempt to release the long line from the belly hook after it became entangled in a tree.
- [NTSB FTW96LA285](https://openairdocs.org/ntsb/FTW96LA285.md): Hiller UH12 · Franklin, LA · Accident · No injuries · Limited investigation · Final report · Jul 1, 1996 · N14637 · Substantial damage
  > loss of engine power for undetermined reasons, and the pilot's failure to maintain rotor RPM. A factor was the unsuitable terrain available for the precautionary landing.
- [NTSB ATL96LA076](https://openairdocs.org/ntsb/ATL96LA076.md): Hiller UH12-E · Huger, SC · Accident · Serious injuries · Limited investigation · Final report · Apr 3, 1996 · N14MQ · Substantial damage
  > The blocked fuel vent line that resulted in engine stoppage. A factor was tall trees that intervened the helicopter's flight path.
- [NTSB MIA94LA029](https://openairdocs.org/ntsb/MIA94LA029.md): Hiller UH-12E · Moore Haven, FL · Accident · Minor injuries · Limited investigation · Final report · Nov 26, 1993 · N130HA · Substantial damage
  > Failure of the pilot-in-command to maintain aircraft control following loss of engine power for undetermined reasons.
- [NTSB CHI94LA022](https://openairdocs.org/ntsb/CHI94LA022.md): Hiller UH12E · Sioux Rapids, IA · Accident · No injuries · Limited investigation · Final report · Oct 22, 1993 · N4026S · Destroyed
  > the Pilot in Command failed to maintain clearance with the terrain while proceeding up an upslope.
- [NTSB CHI92DCD09](https://openairdocs.org/ntsb/CHI92DCD09.md): Hiller Hiller UH-12E · Dows, IA · Accident · No injuries · Final report · Aug 21, 1992 · N527HA · Substantial damage
  > Contaminated fuel resulting in a loss of engine power.
- [NTSB LAX91LA249](https://openairdocs.org/ntsb/LAX91LA249.md): Hiller UH-12E · Huron, CA · Accident · No injuries · Limited investigation · Final report · Jun 7, 1991 · N507HA · Substantial damage
  > That unknown pilot(s) impoperly used the throttle control which caused an overspeed condition. Contributing to this accident was the connecting rod bolt fatigue failure.
- [NTSB NYC88DGM01](https://openairdocs.org/ntsb/NYC88DGM01.md): Hiller UH-12E · Lovely, PA · Accident · 1 fatal · Final report · Aug 4, 1988 · N5375V · Substantial damage
  > The undetermined loss of engine power while performing low level aerial application operations.
- [NTSB MIA88LA014](https://openairdocs.org/ntsb/MIA88LA014.md): Hiller UH-12E · Union Church, MS · Accident · Minor injuries · Limited investigation · Final report · Oct 6, 1987 · N4029R · Substantial damage
  > At an altitude of aprx 75 feet during an agricultural turn, the plt reported that the engine lost power. While executing a forced landing, the rotor blades contacted trees, after which, during the descent, the right skid collided with a stump & the helicopter…
- [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 SEA82DA164](https://openairdocs.org/ntsb/SEA82DA164.md): Hiller-Soloy UH-12E · Spirit Lake, WA · Accident · No injuries · Final report · Sep 15, 1982 · N513HA · Substantial damage
  > Pilot performed autorotation from 2000 feet to check RPM. At 200-300 feet when collective was added power loss occurred. Aircraft landed hard and severed tail boom. Logging support operations.
- [NTSB CHI82DA162](https://openairdocs.org/ntsb/CHI82DA162.md): Hiller 12E · Benson, MN · Accident · No injuries · Final report · May 12, 1982 · N4030C · Substantial damage
  > Helicopter flying at 250 feet to stay below clouds had engine failure. Landed downwind in muddy field. Right skid collapsed.

## 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.aircraft_model_code IN ('4360122', '4360137')
    AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o.case_mkey = x.case_mkey AND o.aircrafts_position = x.position AND o."occurrenceNumber" = 1 AND o."occurrenceCode" = 350))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=4360122&occurrence=350

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