What was found
ON C-CHECK, FUEL LEAKS AT TOP AND BOTTOM OF STIFFENER FWD SPAR JUST OUTBOARD OF PRESSURE SWITCHES, NR 3 MAIN TANK. OPENED TANK AND PURGED IAW MM 28-10-0. REMOVED SEALANT FROM STIFFENER, TIGHTENED AND RESEALED IAW MM 28-11-0. LEAK CHECK GOOD IAW B-727 MM 28-11-0.