NTSB Identification: LAX98LA080.
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Accident occurred Saturday, January 17, 1998 in SAN CARLOS, CA
Probable Cause Approval Date: 02/15/2001
Aircraft: Cessna 150F, registration: N7911F
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.

The aircraft was modified by STC to a conventional landing gear configuration. The pilot reported that he did not sufficiently reduce the airspeed during the approach and the aircraft 'bounced about 2-3 feet' on the touchdown. At that point, the seat slid backwards about 3 to 4 inches and the pilot stated that the abrupt seat movement caused his loss of control. The aircraft then ground looped, turned approximately 90 degrees, and came to a stop upright on the runway. Aircraft maintenance records disclosed that Airworthiness Directive 87-20-03R2, which pertains to the inspection of the seat tracks, had been complied with. The pilot reported to an FAA inspector that he had forgotten to engage the seat locking pin before the flight.

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

The pilot's excessive airspeed, which resulted in a bounced landing, and, his failure to ensure that his seat locking pin was engaged, which caused his seat to move backwards during the touchdown and resulted in his loss of directional control.

Full narrative available

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