NTSB Identification: MIA98LA235.
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Accident occurred Tuesday, September 01, 1998 in KILL DEVIL HILL, NC
Probable Cause Approval Date: 02/22/2001
Aircraft: Cessna 150H, registration: N50009
Injuries: 2 Minor.

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 pilot stated he applied full power and was climbing to a higher altitude as he crossed a bay. The engine suddenly made a loud noise and lost power. He turned back to the closest shore and an airport. He was unable to reach the airport and made a forced landing in a sandy area, at which time the aircraft nosed over. Postcrash examination of the engine by an FAA inspector showed the No. 1 cylinder exhaust valve head had broken off from the stem resulting in the No. 1 piston breaking and the No. 1 connecting rod bending. The No. 1 exhaust valve had accumulated 1,527 flight hours since new.

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

Failure of the number one cylinder exhaust valve resulting in loss of engine power and a forced landing on unsuitable terrain at which time the aircraft nosed over.

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