ASN Wikibase Occurrence # 354701
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| Date: | Thursday 19 March 1998 |
| Time: | 15:50 LT |
| Type: |  Cessna 210K |
| Owner/operator: | Fallon Airmotive Inc. |
| Registration: | N8274M |
| MSN: | 21059274 |
| Year of manufacture: | 1970 |
| Total airframe hrs: | 5360 hours |
| Engine model: | Continental IO-520-L |
| Fatalities: | Fatalities: 0 / Occupants: 4 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Fallon, NV -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Unknown |
| Departure airport: | |
| (KRNO) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
During the initial takeoff climb, the pilot reduced power and the rpm's dropped to zero, but there was no sound change in the engine. The pilot attempted to return to the airport for a precautionary landing. During the turn back to the airport, the engine began to run rough. The pilot was unable to make the runway and made an off-airport emergency landing and collided with ground obstructions. A post-accident investigation revealed an oil starvation failure of the engine. The oil pump's drive gear shaft had failed in torsional overload. Examination of the oil pump's driven gear revealed that the required bronze bushings between it and the driven gear shaft were absent. It was noted that the engine was overhauled 162 hours prior to the accident. During the engine overhaul, the oil pump was sent out for overhaul and was returned to the owner as a disassembled unit. The owner/pilot, who was not a certified A & P mechanic, reassembled the oil pump and reinstalled it on the airplane. A certified A & P mechanic reported that he did sign the logbook to this affect, but he did not monitor or inspect the work that had been completed by the owner.
Probable Cause: The aircraft owner/pilot's improper assembly of the engine oil pump, which resulted in failure of the unit and oil starvation failure of the engine. A factor was the lack of supervision of the owner/pilot's work by the A & P mechanic.
Accident investigation:
 |
|
Sources:
NTSB LAX98LA124
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 11-Mar-2024 17:25 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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