NTSB Identification: ATL88LA159.
The docket is stored on NTSB microfiche number 36164.
Accident occurred Friday, April 29, 1988 in SANDY RIDGE, NC
Probable Cause Approval Date: 06/07/1989
Aircraft: CESSNA 150J, registration: N60276
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 AIRCRAFT ENGINE BEGAN TO VIBRATE EXCESSIVELY AND LOST POWER. THE PILOT LANDED THE AIRCRAFT IN A FIELD. THE AIRCRAFT NOSED OVER IN THE SOFT GROUND. EXAMINATION OF THE ENGINE REVEALED THAT THE NUMBER ONE CYLINDER VALVE SPRING SEAT LOCK HAD FAILED ALLOWING THE INTAKE VALVE TO DROP INTO THE CYLINDER WHERE IT WAS STRUCK BY THE NUMBER ONE PISTON, BENDING THE VALVE STEM AND HEAD.

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

ENGINE ASSEMBLY,VALVE KEEPER..WORN

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

ENGINE ASSEMBLY,VALVE KEEPER..FAILURE,TOTAL

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

ENGINE ASSEMBLY,VALVE,INTAKE..LOOSE


Contributing Factors

TERRAIN CONDITION..SOFT

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