As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT MAIN FUEL TANK REFUEL VALVES DID NOT SHUTOFF. LEFT TANKS HAD SHUT DOWN WITH STOP ON GAUGE & ALL VALVES CLOSED. AFTER TRANSFERRING FUEL FROM LT TO CTR & BACK AGAIN VERIFIED THAT WHEN CLOSING VALVES INBD TAKES A LONG TIME TO CLOSE & WHEN TRANSFERRING WITH VALVES SELECTED CLOSED TRANSFERS AT HALF RATE. CONFIRMED ONLY ONE VALVE OPEN. LATE CLOSING OF INBD VALVE INDICATES INBD VALVE STUCK OPEN. REPLACED LT WING MAIN TANK, INNER REFUEL VALVE CONTROL UNIT IAW AMM.