ASN Wikibase Occurrence # 296150
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| Date: | Friday 7 March 2003 |
| Time: | 07:15 LT |
| Type: |  Stinson 108-1 |
| Owner/operator: | Private |
| Registration: | N8344K |
| MSN: | 1344 |
| Total airframe hrs: | 1878 hours |
| Engine model: | Franklin 6A4150-B4 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | ELOY, Arizona -
 United States of America
|
| Phase: | Unknown |
| Nature: | Private |
| Departure airport: | Tucson-Ryan Field, AZ (KRYN) |
| Casa Grande Municipal Airport, AZ (KCGZ) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The engine lost total power when the number 4 cylinder exhaust valve fractured and separated during cruise flight. During the forced landing to a plowed field the airplane nosed over and came to rest inverted. Examination of the airplane at the accident site revealed a large amount of oil on the exterior of the fuselage. The number 3 and 4 cylinders assemblies dislodged from the engine. An engine examination revealed that the number 4 cylinder exhaust valve had fractured between the valve head and stem. Examination of the fracture face disclosed features consistent with fatigue.
Probable Cause: a loss of engine power caused by the fatigue failure of the number 4 cylinder exhaust valve.
Accident investigation:
 |
|
Sources:
NTSB LAX03FA108
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 13-Oct-2022 17:11 | ASN Update Bot | Added |
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