ASN Wikibase Occurrence # 364366
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| Date: | Tuesday 15 October 1991 |
| Time: | 16:55 LT |
| Type: |  Piper PA-18 |
| Owner/operator: | Private |
| Registration: | N3850Z |
| MSN: | 18-7608 |
| Year of manufacture: | 1961 |
| Total airframe hrs: | 1653 hours |
| Engine model: | LYCOMING O-320-B2B |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Montague Island, AK -
 United States of America
|
| Phase: | En route |
| Nature: | Executive |
| Departure airport: | Cordova, AK (CDV) |
| Cordova, AK (CDV) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
DURING CRUISE FLIGHT, THE ENGINE SEIZED WITHOUT WARNING. WITH NO SUITABLE LANDING AREA ON THE BEACH, THE PILOT DITCHED IN THE OCEAN AND SWAM ASHORE ABOUT 1/2 MILE AWAY. AN INVESTIGATION REVEALED THAT THE CRANKSHAFT HAD BROKEN AT THE FORWARD CHEEK OF THE #3 MAIN BEARING. A REDDISH SEALANT RESIDUE WAS FOUND AROUND THE MAIN BEARING THRU STUD HOLES OF THE CRANKCASE. ACCORDING TO LYCOMING SERVICE INSTRUCTION #1125A, SEALANT SHOULD NOT HAVE BEEN APPLIED IN THIS AREA.
Probable Cause: THE POWER LOSS DUE TO THE CRANKSHAFT FAILURE. CONTRIBUTING TO THE ACCIDENT WAS IMPROPER MAINTENANCE DURING THE LAST ENGINE OVERHAUL.
Accident investigation:
 |
|
Sources:
NTSB ANC92FA005
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 19-Mar-2024 14:15 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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