What was found
DURING C-4 CHECK INSPECTION, FOUND LOWER FLANGE OF FRAME CORRODED STA 1140 LONGERON 33R. REMOVED DAMAGE, INSTALLED DOUBLER REPAIR IAW AIA DWG AIA/E/2405 REV O DATED 11-14-96. CORROSION CARD NR 5590-0551, NON-ROUTINE TASK CARD NR 88523.