ASN Wikibase Occurrence # 294291
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| Date: | Tuesday 14 December 2004 |
| Time: | 17:00 LT |
| Type: |  Piper PA-28-140 |
| Owner/operator: | Garis Kinegak |
| Registration: | N801FS |
| MSN: | 28-7125090 |
| Year of manufacture: | 1970 |
| Total airframe hrs: | 1968 hours |
| Engine model: | Lycoming O-320-E2A |
| Fatalities: | Fatalities: 0 / Occupants: 3 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Sleetmute, Alaska -
 United States of America
|
| Phase: | Unknown |
| Nature: | Private |
| Departure airport: | Anchorage , AK (Z41) |
| Bethel Airport, AK (BET/PABE) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The commercial certificated pilot reported that while the airplane was in level cruise flight at 5,000 msl, he noted a rough running engine and a slight reduction in engine rpm, which was followed by a rapid loss of engine power, and subsequent loss of altitude. He was unable to restore adequate engine power to maintain level flight, and selected a snow-covered area as a forced landing site. During the landing roll, the airplane's nose landing gear collapsed, and the airplane nosed over. The airplane sustained structural damage to the wings and fuselage. An FAA inspector reported that during his inspection of the accident airplane's engine, he discovered that a significant portion of the exhaust valve had broken free from the exhaust valve stem in the number 1 cylinder. He stated that the broken portion of the valve subsequently entered the number 1 cylinder combustion chamber and damaged the piston.
Probable Cause: A loss of engine power during cruise flight due to a fractured exhaust valve, which resulted in a forced landing, and subsequent nose over of the airplane. A factor associated with the accident was the lack of suitable terrain for a successful emergency landing.
Accident investigation:
 |
|
Sources:
NTSB ANC05LA018
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 11-Oct-2022 14:50 | ASN Update Bot | Added |
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