NTSB Identification: SEA88LA087.
The docket is stored on NTSB microfiche number 35990.
Accident occurred Sunday, May 01, 1988 in MEDFORD, OR
Probable Cause Approval Date: 02/28/1989
Aircraft: STEARMAN A-75-N1, registration: N53125
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.

PLT PERFORMED A NEGATIVE 'G' MANEUVER, ESTIMATED AT 2 TO 2.5 NEGATIVE 'G' FORCE, FOLLOWING WHICH THE ENGINE LOST POWER. A FORCED LANDING WAS ACCOMPLISHED IN SCRUB TREES. THE ENGINE IS EQUIPPED WITH A FLOAT CARBURETOR. THERE WERE INDICATIONS THAT THE CAUSE OF POWER LOSS WAS NEGATIVE 'G' DISPLACEMENT OF ONE OR BOTH FLOATS IN THE CARBURETOR BOWL (STUCK FLOAT), RESULTING IN FUEL STARVATION.

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

AEROBATICS..PERFORMED..PILOT IN COMMAND

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

MANEUVER..IMPROPER..PILOT IN COMMAND

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

FUEL SYSTEM,CARBURETOR FLOAT..DISABLED

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

FLUID,FUEL..STARVATION


Contributing Factors

TERRAIN CONDITION..NONE SUITABLE

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