BIG SPRING, TX, USA
N322
GRUMMAN G-21A
DURING FLT, THE PLT NOTED THAT THE LEFT FUEL TANK WAS ALMOST EMPTY AND THE RIGHT TANK HAD GAINED FUEL. HE IMMEDIATELY SWITCHED FROM THE BOTH POSITION TO THE RIGHT TANK AND STARTED TO WORK THE WOBBLE PUMP. THE FUEL CONTINUED TO DROP IN THE LEFT TANK AND THE ACFT LOST PWR IN BOTH ENGINES. THE ACFT NOSED OVER DURING THE FORCED LANDING THAT FOLLOWED. EXAM OF THE ACFT REVEALED THAT THE FUEL VENT TO THE RIGHT TANK WAS BLOCKED. IN ADDITION, THE PLT STATED THAT THE ACCIDENT COULD HAVE BEEN PREVENTED BY NOT RUNNING ON BOTH TANKS, PARTICULARLY WITH PARTIAL LOADS OF FUEL.
Source: NTSB Aviation Accident Database
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