What was found
DURING C-4 CHECK INSPECTION, FOUND FS 1240 TO FS 1260 SKIN CORRODED AT STRINGER 36. REMOVED CORRODED SKIN, INSTALLED REPAIR IAW AIA SKETCH AIA/E/2398 REV O SHEET 01 THROUGH 08 DATED 11-11-96. CORROSION CARD NR 5590-0551, NON-ROUTINE TASK CARD NR 88433.