NTSB Identification: BFO86LA040.
The docket is stored on NTSB microfiche number 31566.
Accident occurred Wednesday, July 16, 1986 in ABERDEEN, MD
Aircraft: CESSNA 172L, registration: N3933Q
Injuries: 2 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.

THE PLT STATED THAT THE ENG BEGAN TO RUN ROUGH DURING FLT, THEN ALL AT ONCE, IT STARTED VIBRATING EXCESSIVELY. HE ATTEMPTED TO LAND AT THE PHILLIPS AAF, BUT THE ARPT WAS CLOSED & THE RWY LIGHTS WERE NOT ILLUMINATED. BY THE TIME HE SAW THE RWY, THE ACFT WAS NOT IN A POSITION TO LAND, SO HE TRIED MANEUVERING TOWARD AN OPEN AREA ON THE ARPT. HOWEVER, THE ACFT COLLIDED WITH TREES & CRASHED. AN EXAM OF THE ENG REVEALED THAT THE #3 EXHAUST VALVE PUSHROD WAS BENT & THE #1 INTAKE VALVE WAS BROKEN. AFTER THIS ACCIDENT, THE OWNER/OPERATOR (CAP) STOPPED USING PHILLIPS XC2 ENG OIL DUE TO POSSIBLE PROBLEMS ASSOCIATED WITH ITS USE WHICH INCLUDED STICKING VALVES.

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

ENGINE ASSEMBLY,PUSH ROD..BENT

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

ENGINE ASSEMBLY,VALVE,INTAKE..FAILURE,TOTAL


Contributing Factors

LIGHT CONDITION..DARK NIGHT



Contributing Factors

OBJECT..TREE(S)

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