What was found
ON C-CHECK, FUEL LEAK AT 2 FASTENERS ON STIFFENER LOWER FWD SPAR WS 224, RT CENTER TANK. OPENED TANK AND PURGED IAW MM 28-10-0. REMOVED SEALANT FROM STIFFENER, TIGHTENED FASTENER AND RESEALED IAW MM 28-11-0. LEAK CHECK IAW 727 MM 25-11-0. NO LEAKS NOTED.