As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) FUEL SYSTEM NON-RETURN VALVE JAMMED OPEN BY FOD CAUSING A FUELIMBALANCE BETWEEN NO1 AND NO2 TANKS. INVESTIGATION FOUND APLASTIC BLANK WAS JAMMING THE VALVE OPEN. SUSPECT FOD WAS A BLANKING CAP FROM BOOST PUMP PRESSURE LINE. BOOST PUMP HAD BEEN REPLACED PRIOR TO RECEIPT BY VIRGIN BLUE. PERSONNEL/MAINTENANCE ERROR. FOD.