ASN Wikibase Occurrence # 294510
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| Date: | Sunday 12 September 2004 |
| Time: | 13:30 LT |
| Type: |  Cessna 172B |
| Owner/operator: | Private |
| Registration: | N7422X |
| MSN: | 17247922 |
| Year of manufacture: | 1960 |
| Total airframe hrs: | 4153 hours |
| Engine model: | Teledyne Continental O-300D |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Wiscasset, Maine -
 United States of America
|
| Phase: | Unknown |
| Nature: | Private |
| Departure airport: | Greenville, ME (3B1) |
| Wiscasset Airport, ME (ISS/KIWI) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
While in cruise flight, the engine suddenly began to lose oil pressure. Thirty seconds later, the engine quit, and the pilot performed a forced landing to a field. During the landing, the airplane struck trees and flipped over. Examination of the engine revealed oil in the engine compartment and an oil leak that originated from the seal where the oil filter adapter attached to the crankcase. A subsequent teardown of the engine reveled that the number 1 connecting rod was fractured and exhibited thermal signatures, consistent with high temperatures. Fragments of bearing and connecting rod material were located in the oil sump. The fragments were blackened, consistent with exposure to high temperatures. In addition, the crankshaft exhibited thermal damage and smearing on the number 1 and number 2 connecting rod journals.
Probable Cause: The failure of the oil filter adapter seal, which resulted in a loss of oil pressure, and subsequent catastrophic engine failure, and forced landing.
Accident investigation:
 |
|
Sources:
NTSB NYC04LA210
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 11-Oct-2022 18:59 | ASN Update Bot | Added |
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