What was found
ON C-CHECK, FUEL LEAKS AT 4 FASTENERS TOP SKIN FROM WS 304 TO INBOARD END OF NR 3 MAIN TANK. OPENED TANK AND PURGED IAW MM 28-10-0. REMOVED SEALANT FROM FASTENERS, TIGHTENED, AND RESEALED IAW MM 28-11-0. LEAK CHECK GOOD IAW B-727 MM 28-11-0.