What was found
DURING C-4 CHECK INSPECTION, FOUND FS 1390 LONGERON 31 RIGHT BULGE IN SKIN. REMOVED CORRODED SECTION OF SKIN, INSTALLED REPAIR IAW EA 96-326, SKETCH AIA/E/2380 AND 8110-3 DATED 11-15-96. C-4 CHECK CARD NR 3097, NON-ROUTINE TASK CARD NR 87268.