What was found
UNWANTED FUEL TRANSFER. FUEL XFER FROM RT MAIN TO CNTR TANK. FOUND LEAK AT RT AUX FUEL TANK UPPER RIB 3. LOCATED RIGHT UPPER OF FUEL PLATE 631BB TOP OF STRINGER, MARKED. LOCATED LOOSE SHIM BETWEEN UPPER STRINGER AND O/B OF RIB 3, I/B OF RT MAIN TANK. BLOW-BACK SHOWS AREA IS LEAKING FROM SHIM AREA. CLEANED AND REPOSITIONED SHIMS. TQ FASTENERS 9EA IN AREA. SEALED WITH A1-2 AND B1-2 AT 1400. FUELED TANK TO 24,000 LBS, AFTER 30 MINS, NO LEAKS.