NTSB Identification: NYC85FGM03.
The docket is stored on NTSB microfiche number 27644.
Accident occurred Saturday, April 20, 1985 in CONNELLSVILLE, PA
Aircraft: ISTVANICK ZIPPPY SPORT, registration: N39322
Injuries: 1 Minor.
NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.
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.
The National Transportation Safety Board determines the probable cause(s) of this accident to be:FUEL SYSTEM,SELECTOR/VALVE..BLOCKED(PARTIAL)
The National Transportation Safety Board determines the probable cause(s) of this accident to be:MAINTENANCE,INSPECTION..IMPROPER..PILOT IN COMMAND
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