What was found
FUEL OBSERVED ON BOTTOM OF WING, RUNNING DOWN SIDES OF NR 1 ENGINE PLYON, OUT PYLON DRAIN UPON ARRIVAL. REMOVED UPPER FWD WING PANEL AND FOUND FUEL EVERYWHERE. FAIRCHILD STATED NEW RETURN VALVE PN 106-0007-01 MFG BY SHAW AERO SERVICES HAD BEEN FOUND LEAKING AROUND SIGNAL OUTPUT WIRES.. RUN-UP OF ENGINE FOUND FUEL COMING FROM AROUND VALVE TO WING FITTING. REMOVED VALVE. REPLACED MS29512-08 O-RING, RUN-UP ACFT, STILL LEAKED. FAIRCHILD STATED TO CHANGE VALVE TO STOP LEAK. INSTALLED NEW VALVE SAME P/N SAME MFG AND LEAK IS GONE. (X)