ASN Wikibase Occurrence # 299401
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| Date: | Friday 7 January 2000 |
| Time: | 17:53 LT |
| Type: |  Cessna 177B |
| Owner/operator: | George Coutrakon |
| Registration: | N34021 |
| MSN: | 17701601 |
| Total airframe hrs: | 3603 hours |
| Engine model: | Lycoming O-360-A1F6 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | RIALTO, California -
 United States of America
|
| Phase: | Unknown |
| Nature: | Private |
| Departure airport: | PACOIMA , CA (KWHP) |
| REDLANDS , CA (L12) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The accident flight was the first flight following an oil change. While in cruise flight about 38 minutes after takeoff, the engine began to run roughly and the oil pressure dropped to zero. The engine then completely lost power and the pilot attempted to land at the airport. He touched down short of the runway and collided with a fence. During the postaccident examination, oil was evident on the firewall, rear engine case area, and in the area of the oil pressure screen housing, streaming aft on the underside of the aircraft and on the forward edge of both landing gear struts. The screws that attach the oil pressure screen were observed to be improperly secured; there was no discernible torque required to loosen the screws. The oil pressure screen had been removed during the oil change. The improperly torqued oil screen housing bolts resulted in the loss of oil, and the number 2 cylinder connecting rod bearing failure and overheating of the connecting rod. The connecting rod released from the crankshaft journal and punctured the upper left crankcase, damaging the adjacent components.
Probable Cause: The failure of the maintenance personnel to follow the manufacturer's procedures and directives regarding the proper torquing of the screws securing the oil pressure screen housing, which resulted in the loss of lubricating oil, and the subsequent seizure of the engine.
Accident investigation:
 |
|
Sources:
NTSB LAX00LA069
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 16-Oct-2022 06:16 | ASN Update Bot | Added |
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