What was found
DURING TAKEOFF ROLL, A FUEL LEAK WAS REPORTED COMING FROM THE LT WING WHERE THE OTBD FLAP MEETS THE AILERON. THE ACFT RETURNED, WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED AND R & R THE OTBD FLAPPER VALVE IN THE LT WING. LEAK CHECKS PERFORMED SATISFACTORILY, AND THE ACFT WAS APPROVED FOR RETURN TO SERVICE.