What was found
DURING C-03 CHECK CORROSION WAS FOUND ON NR 1 PYLON TRAILING EDGE FAIRING INBOARD SKIN, PYLON STA 8370 TO 9278. MAINTENANCE REMOVED CORROSION ON NR 1 PYLON TRAILING EDGE FAIRING INBOARD SKIN AND FOUND MATERIAL LOSS TO BE OUT OF LIMITS. REMOVED DAMAGED SKIN PYLON STA 8370 TO 9278; UPON FURTHER INSPECTION FOUND CRACKED LOWER RIB; REMOVED CRACKED RIB; FABRICATED NEW REPLACEMENT SKIN AND LOWER RIB; INSTALLED REPAIR PARTS IAW A320 SRM 51-42-11 PG 7-12, FIG 2.