NTSB Identification: LAX99LA008.
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Accident occurred Sunday, October 11, 1998 in OAKLAND, CA
Probable Cause Approval Date: 06/21/2000
Aircraft: Stearman E75, registration: N770WM
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 completed three banner tow flights in the airplane on the day of the accident. He refueled between the second and third flights. The pilot said the engine ran perfect during takeoff. He started a climb of 30 degrees and at 400 feet he initiated a right 270-degree turn and leveled off. During the level off, power was reduced to 24 inches of manifold pressure. During the turn the pilot heard a pop and the engine stopped producing power. He immediately lowered the nose and headed for the only open area he could see, a concrete pad in a construction area. He pumped the throttle several times and verified the gas was on, but was unable to restart the engine. As the airplane neared the touchdown point, a tractor-trailer truck moved in-between the airplane and the touchdown point and the airplane collided with the truck. The operator observed the takeoff and heard the engine quit. Then he heard several 'blurps' and assumed the pilot was moving the throttle to get the engine to restart. He also noticed fuel coming out of the center section vent line when the nose was lowered and opined that during the pushover to level flight, the pilot entered a negative 'g' condition. No discrepancies were found during examination of the airframe or engine.
The National Transportation Safety Board determines the probable cause(s) of this accident to be: A loss of engine power due to the pilot's inadvertent entry into a negative 'g' condition, which induced a temporary interruption of the fuel supply. Full narrative available
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