As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW REPORTED A POSSIBLE FUEL LEAK FROM THE RT WING ON TAKEOFF. THE ACFT RETURNED TO DEPARTURE, WHERE IT LANDED WITHOUT INCIDENT. MX R & R THE OTBD CHECK VALVE (FLAPPER VALVE) ON THE RT WING, AND THE ACFT WAS APPROVED FOR RETURN TO SERVICE.