What was found
NR 2 PYLON AFT STRUCTURE, FWD / RT INBD VERTICAL ANGLE IS FRETTED. BLENDED OUT DAMAGED AREA IAW SRM 51-73-10, FOUND TO BE OUT OF LIMITS IAW SRM 54-50-00, FIG 10, PG 111 (MORE THAN 25 PERCENT). REMOVED RIB. INSTALLED NEW RIB PN A5451521950100 IAW SRM 54-54-11, FIG 1, SECTION "D", ITEM 55, PG 2; PO 688715.1. R & R NEW RIB IAW SRM 51-40-21.