ASN Wikibase Occurrence # 353832
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| Date: | Sunday 6 September 1998 |
| Time: | 18:07 LT |
| Type: |  Cessna 140 |
| Owner/operator: | Private |
| Registration: | N81045 |
| MSN: | 10335 |
| Total airframe hrs: | 4540 hours |
| Engine model: | Continental C-85-12 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Fairbanks, AK -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Clear Creek, AK |
| (KFAI) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
While in cruise flight the pilot heard a 'clunk' and engine rpm immediately began to decrease. The engine noise and rpm decrease continued, the pilot performed a forced landing in tundra, and the airplane nosed over onto its back. Postaccident inspection revealed that the exhaust valve stem of the number two cylinder had separated, and the valve was ingested into the cylinder. The engine had accumulated 4,555 hours since new, and 1,089 hours since overhaul.
Probable Cause: The loss of engine power due to an in-flight fracture of an engine exhaust valve stem assembly. A factor associated with the accident was the lack of suitable terrain for a forced landing.
Accident investigation:
 |
|
Sources:
NTSB ANC98LA140
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 10-Mar-2024 11:02 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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