What was found
DURING C-4 CHECK INSPECTION, FOUND FS 1220 STRINGER 33R WEB CORRODED. REMOVED CORROSION ON WEB AND REPAIRED IAW AIA SKETCH AIA/E/2398 REV O SHEET 1 THROUGH 8 DATED 11-11-96. CORROSION CHECK CARD NR 5590-055, NON-ROUTINE TASK CARD NR 87959.