ASN Wikibase Occurrence # 364550
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| Date: | Wednesday 11 September 1991 |
| Time: | 11:00 LT |
| Type: |  Cessna 172P |
| Owner/operator: | Mohave Aviation Inc. |
| Registration: | N97564 |
| MSN: | 17276210 |
| Engine model: | LYCOMING O-320-D2J |
| Fatalities: | Fatalities: 0 / Occupants: 3 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Hesperia, CA -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Hesperia, CA (L26) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
DURING THE INITIAL CLIMB, THE PILOT EXPERIENCED A LOSS OF ENGINE POWER, AND WAS UNABLE TO CONTINUE TO CLIMB OR MAINTAIN ALTITUDE. THE PILOT STATED TO FAA INSPECTORS THAT HE CHANGED FUEL TANKS AND ADJUSTED THE MIXTURE TO NO AVAIL. HE LANDED STRAIGHT AHEAD INTO UNSUITABLE TERRAIN AND NOSED OVER. INVESTIGATION DETERMINED THAT NUMBER 2 CYLINDER EXHAUST VALVE HAD STUCK OPEN FROM CARBON BUILD UP. A MANUFACTURERS SERVICE BULLETIN REGARDING THIS POSSIBLE PROBLEM HAD NOT BEEN ACCOMPLISHED AT THE RECOMMENDED TIME, NOR WERE OTHER ITEMS OF IN SERVICE INSPECTION/INFORMATION REGARDING VALVE STICKING ADDRESSED ACCORDING TO THE RECORDS AVAILABLE.
Probable Cause: A STUCK EXHAUST VALVE DUE TO THE OPERATOR'S NON COMPLIANCE WITH A MANUFACTURERS RECOMMENDED SERVICE BULLETIN ON THE ENGINE. CONTRIBUTING TO THE ACCIDENT WAS THE LACK OF SUITABLE TERRAIN FOR A SAFE LANDING.
Accident investigation:
 |
|
Sources:
NTSB LAX91LA389
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 19-Mar-2024 16:18 | ASN Update Bot | Added |
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