ASN Wikibase Occurrence # 386168
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| Date: | Saturday 3 March 2001 |
| Time: | 14:00 LT |
| Type: |  Helio H-295 |
| Owner/operator: | Wright Air Service,inc. |
| Registration: | N42DC |
| MSN: | 1454 |
| Total airframe hrs: | 7519 hours |
| Engine model: | Lycoming GO-480-G1D6 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Clear, AK -
 United States of America
|
| Phase: | En route |
| Nature: | Ferry/positioning |
| Departure airport: | Stampede, AK (Z90) |
| Fairbanks International Airport, AK (FAI/PAFA) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The certificated airline transport pilot reported that while in level, cruise flight, the engine began to run rough and lose power. The pilot said that while performing the engine emergency procedures, he smelled smoke in the cabin, and noted a substantial amount of engine oil on the windscreen. The airplane collided with trees during a subsequent forced landing. A postaccident investigation revealed that the number two connecting rod had sustained a complete fracture. The number 2 connecting rod journal displayed significant amount of heat induced bluing. The fractured connecting rod, main journal bearing shells (7 halves), and rod bearing shells (7 halves) were sent to the NTSB's Materials Laboratory for examination. A Senior Safety Board metallurgist reported that the separated connecting rod displayed evidence of low cycle, high stress fatigue cracking. A scanning electron microscope (SEM) examination of the rod bearing shells disclosed pitting, with irregular-shape metal particles embedded on the surface of the bearing material. The area around the pits showed evidence of metallic flow from the pits.
Probable Cause: The shifting of engine connecting rod bearings, and the fracture of an engine connecting rod.
Accident investigation:
 |
|
Sources:
NTSB ANC01LA039
History of this aircraft
Other occurrences involving this aircraft
| 15 August 1993 | N42DC | Private | 0 | Mt. Deborah, AK | |
sub |
| 8 April 1994 | N42DC | Wright Air Service, Inc. | 0 | Manley Hot Sprg, AK | |
sub |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 05-Apr-2024 11:52 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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