NTSB Identification: LAX88LA054.
The docket is stored on NTSB microfiche number 36424.
Accident occurred Tuesday, November 24, 1987 in SAN CLEMENTE, CA
Probable Cause Approval Date: 04/24/1989
Aircraft: CESSNA 152, registration: N5418P
Injuries: 1 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

A PARTIAL LOSS OF ENG POWER OCCURRED WHILE THE STUDENT PLT WAS ON A SOLO X-COUNTRY FLT. HE APPLIED CARB HEAT, BUT TO NO AVAIL. THE ENG CONTINUED TO RUN ROUGH & THE PLT MADE AN EMERGENCY LANDING ON UPWARD SLOPING TERRAIN. DURING THE LANDING ROLL, THE NOSE GEAR HIT A HOLE IN THE DIRT & THE ACFT NOSED OVER. AN EXAM OF THE ENG DISCLOSED THAT THE #3 EXHAUST VALVE RETAINING NUT HAD BACKED OFF UNTIL THE VALVE WOULD NOT OPERATE AS THE CRANKSHAFT WAS ROTATED. DURING MAINTENANCE ON THE PREVIOUS DAY, THE #3 VALVES HAD BEEN ADJUSTED.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

ENGINE ASSEMBLY,VALVE,EXHAUST..LOOSE

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

MAINTENANCE..IMPROPER..COMPANY MAINTENANCE PERSONNEL

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

ENGINE ASSEMBLY,VALVE,EXHAUST..INOPERATIVE


Contributing Factors

TERRAIN CONDITION..ROUGH/UNEVEN

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