SAN LUIS OBISPO, CA, USA
N71T
QUESTAIRE VENTURE
THE PILOT WAS PERFORMING THE INITIAL TEST FLIGHT ON HIS HOMEBUILT AIRCRAFT. AFTER EXECUTING SEVERAL APPROACHES WITHOUT ACTUALLY LANDING THE AIRCRAFT, THE PILOT DECIDED TO MAKE A FINAL APPROACH TO A FULL STOP. AT APPROXIMATELY 800 FEET AGL, THE AIRCRAFT'S ENGINE EXPERIENCED A TOTAL LOSS OF POWER. THE PILOT EXECUTED A FORCED LANDING TO A FIELD. EXAMINATION BY THE FAA REVEALED THAT THE AIRCRAFT HAD ADEQUATE FUEL SUPPLY, BUT THE ENGINE FAILED AS A RESULT OF FUEL STARVATION CAUSED BY A MALFUNCTIONING FUEL SYSTEM VENT CHECK VALVE.
THE FAILURE OF THE FUEL SYSTEM VENT CHECK VALVE, WHICH RESULTED IN FUEL STARVATION TO THE AIRCRAFT'S ENGINE.
Source: NTSB Aviation Accident Database
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