ASN Wikibase Occurrence # 365063
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| Date: | Tuesday 25 June 1991 |
| Time: | 11:11 LT |
| Type: |  Cessna 150M |
| Owner/operator: | Pegasas Flight Center, Inc. |
| Registration: | N3674V |
| MSN: | 15076584 |
| Year of manufacture: | 1975 |
| Engine model: | CONTINENTAL O-200-A |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Dana Point, CA -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | |
| Fullerton, CA (KFUL) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
WHILE CRUISING NEAR A BEACH THE AIRPLANE'S ENGINE LOST ALL POWER. THE PILOT MADE A FORCED LANDING OFF SHORE. UPON TOUCHING DOWN IN SHALLOW WATER THE AIRPLANE NOSED OVER. THE EXAMINATION OF THE ENGINE REVEALED THAT ITS NO.1 CYLINDER'S EXHAUST VALVE HAD PROBABLY BECOME STUCK IN ITS GUIDE, & ULTIMATELY THE ROCKER ARM BROKE. FURTHER INVESTIGATION REVEALED THAT TWO DAYS BEFORE THE ACCIDENT THE PILOT HAD EXPERIENCED A POWER LOSS & WHEN THE ENGINE WAS EXAMINED THE SAME STUCK VALVE WAS FOUND. THE MECHANIC WHO FREED UP THE VALVE HAD CAUTIONED THE PILOT THAT, ALTHOUGH HE WAS SUCCESSFUL IN FREEING UP THE VALVE, THE ENGINE WAS IN NEED OF AN OVERHAUL & THE VALVE COULD BECOME STUCK, AT ANY TIME, DURING FUTURE FLIGHTS. THE ENGINE HAD BEEN OPERATED FOR ABOUT 1857 HOURS SINCE ITS LAST MAJOR OVERHAUL.
Probable Cause: THE SEIZURE OF THE NO. 1 CYLINDER'S EXHAUST VALVE IN ITS GUIDE AND THE RELATED FRACTURING OF THE ROCKER ARM; AND THE PILOT'S OPERATION OF THE AIRCRAFT WITH KNOWN DEFICIENCIES.
Accident investigation:
 |
|
Sources:
NTSB LAX91LA276
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 20-Mar-2024 06:13 | ASN Update Bot | Added |
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