CONNELLSVILLE, PA, USA
N39322
ISTVANICK ZIPPPY SPORT
THE ACFT CONTACTED TREES FOLLOWING A LOSS OF PWR SHORTLY AFTER TAKEOFF. PLT STATED HE PERFORMED 3 HIGH SPEED TAXI RUNS DURING WHICH THE ACFT AND ENG OPERATED NORMALLY. WITNESSES STATED THE ACFT BECAME AIRBORNE ON THE 4TH TAXI RUN, CLIMBED TO APRX 75 FT AGL AND BEGAN LOSING ALT WHEN A LEFT TURN TO DOWNWIND WAS ENTERED. INSPECTION OF THE ACFT DISCLOSED THE 2 POSITION FUEL SELECTOR VALVE WAS STIFF TO MOVE. REMOVAL OF THE SELECTOR VALVE REVEALED THE ROTATING SHAFT SEAL GASKET HAD DETERIORATED BLOCKING APRX 50% OF THE INLET FUEL FLOW AND APRX 60-65% OF THE OUTLET FUEL FLOW. THIS WAS THE 1ST FLT OF THE EXPERIMENTAL HOMEBUILT ACFT.
Source: NTSB Aviation Accident Database
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