As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW REPORTED THAT THEY LOST 400LBS OF FUEL FROM THE LEFT WING AFTER TAKEOFF. THE ACFT RETURNED TO DEPARTURE, WHERE IT LANDED WITHOUT INCIDENT. MX R & R THE FLAPPER VALVE ON THE LT WING , LEAK CHECK WITH NO DEFECTS NOTED AND THE ACFT WAS APPROVED FOR RETURN TO SERVICE.