NTSB Identification: LAX85LA351.
The docket is stored on NTSB microfiche number 29822.
Accident occurred Wednesday, August 14, 1985 in SAINT HELENA, CA
Aircraft: CESSNA 172P, registration: N5259K
Injuries: 3 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.

DURING A LOCAL PERSONAL FLT, THE PLT SAID THE 'ENGINE BEGAN TO RUN ROUGH A SHAKE VIOLENTLY.' WITH NOT ENOUGH POWER TO MAINTAIN ALTITUDE, THE PLT ELECTED TO MAKE AN EMERGENCY LANDING IN A FIELD, HOWEVER, OVERRAN THE FIELD AFTER TOUCHDOWN AND COLLIDED WITH GROUND OBSTRUCTIONS IN A VINEYARD. EXAMINATION OF THE ENGINE REVEALED STUCK INTAKE AND EXHAUST VALVES IN THE NUMBER ONE CYLINDER. IN ADDITION, THE EXHAUST VALVE PUSHROD WAS FOUND SEPARATED IN THE MIDDLE WITH SEVERE BATTERING PEENING NOTED TO THE BROKEN ENDS OF THE PUSHROD.

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

ENGINE ASSEMBLY,VALVE,INTAKE..JAMMED

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

ENGINE ASSEMBLY,PUSH ROD..SEPARATION

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

GO-AROUND..NOT POSSIBLE..PILOT IN COMMAND

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

TREE(S)

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

REMEDIAL ACTION..NOT POSSIBLE..PILOT IN COMMAND


Contributing Factors

TERRAIN CONDITION..NONE SUITABLE


Contributing Factors

TERRAIN CONDITION..NONE SUITABLE

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