ASN Wikibase Occurrence # 375975
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| Date: | Friday 1 November 1985 |
| Time: | 17:30 LT |
| Type: |  Hiller UH-12E |
| Owner/operator: | Private |
| Registration: | N400AH |
| MSN: | 1177 |
| Total airframe hrs: | 6334 hours |
| Engine model: | LYCOMING TIVO-540-A2A |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Vernal, UT -
 United States of America
|
| Phase: | En route |
| Nature: | Unknown |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE PLT STATED HE HAD JUST DEPARTED A SITE LOCATED ON TOP OF A MOUNTAIN, WHICH IS APPROXIMATELY 12,200 FT MSL. THE PILOT SAID 30 SECONDS LATER, THE HELICOPTER LOST PARTIAL POWER. REQUIRING HIM TO MAKE A FORCE LANDING. THE INSPECTION OF THE TURBOCHARGER REVEALED THE COMPRESSOR IMPELLER RETAINING NUT HAD BACKED OFF, ALLOWING THE COMPRESSOR IMPELLER TO CONTACT THE COMPRESSOR SHROUD AND LEADING TO THE SEIZURE OF THE IMPELLER. THIS RESULTED IN THE FAILURE OF THE TURBOCHARGER.
Probable Cause:
Accident investigation:
 |
|
Sources:
NTSB DEN86LA016
History of this aircraft
Other occurrences involving this aircraft
| 31 August 1983 | N400AH | Craig Heliicopters, Inc. | 0 | Manning, ND | |
sub |
| 2 January 1988 | N400AH | Private | 0 | Vernal, UT | |
sub |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 29-Mar-2024 11:25 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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