ASN Wikibase Occurrence # 369059
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| Date: | Tuesday 21 March 1989 |
| Time: | 00:45 LT |
| Type: |  Piper PA-32-260 |
| Owner/operator: | Coastal Planes Airways |
| Registration: | N390G |
| MSN: | 32-848 |
| Year of manufacture: | 1966 |
| Total airframe hrs: | 4218 hours |
| Engine model: | LYCOMING O-540-E4B5 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Kershaw, SC -
 United States of America
|
| Phase: | En route |
| Nature: | Unknown |
| Departure airport: | Southern Pines, NC |
| Thomaston, GA (RGD | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE PLT RPRTD THE ENG ABRUPTLY LOST ALL POWER DURING CRUISE. SUBSEQUENTLY, THE ACFT COLLIDED WITH TREES DURING A FORCED LNDG AT NIGHT & BOTH WINGS WERE TORN OFF. AN EXAM OF THE ENG REVEALED THAT THE CRANKSHAFT GEAR BOLT WAS LOOSE, AND THAT THE GEAR ALIGNMENT DOWL WAS SHEARED, WHICH HAD RESULTED IN A LOSS OF ENG GEAR TRAIN CONTINUITY. A METALLURGICAL EXAM REVEALED THE DOWEL PIN HAD FAILED FROM FATIGUE. ACCORDING TO THE OPERATOR'S MECHANIC, THE ENG HAD EXPERIENCED A SUDDEN STOPPAGE DUE TO A PROP STRIKE ABOUT 151 OPERATING HOURS BEFORE THE ACCIDENT. LYCOMING SERVICE BULLETIN #465 OUTLINED MANDATORY INSPECTION, MODIFICATION, AND ASSY PROCEDURES FOR THE CRANK GEAR TO BE COMPLIED WITH DURING OVHL, AFTER A PROP STRIKE OR WHEN EVER GEAR TRAIN REPAIR IS REQUIRED. ACCORDING TO THE MECHANIC, THE BULLETIN WAS NOT COMPLIED WITH AFTER THE PROP STRIKE.
Probable Cause: FATIGUE FAILURE OF THE CRANKSHAFT DOWEL PIN. FACTORS RELATED TO THE ACCIDENT WERE: FAILURE OF MAINTENANCE PERSONNEL TO FOLLOW THE APPLICABLE SERVICE BULLETIN AND DARKNESS.
Accident investigation:
 |
|
Sources:
NTSB ATL89LA110
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Mar-2024 10:25 | ASN Update Bot | Added |
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