What was found
DFW - FLT 0608 - ON CLIMB-OUT, PASSENGER REPORTED FUEL LEAKING FROM LEFT WING. CONFIRMED LEAK BY VISUAL INSPECTION FROM CABIN BY FLIGHT ENGINEER, RETURNED TO DFW, LANDED WITHOUT INCIDENT. INSPECTED LEFT WING WITH NO FUEL LEAKS NOTED. EXCESSIVE FUEL IN SURGE TANK. REPLACED SURGE TANK CHECK VALVE. SYSTEM GROUND CHECKED, NORMAL OPERATION. (X)