What was found
DURING C-CHECK, FOUND RT WING LOWER FLANGE OF WING RIB CRACKED AT WS 629 AT LOWER STRINGER 8 PER PENETRANT INSPECTION PER SB 727-57-0127 REV 3 ENDS OF CRACK MARKED. STOP DRILLED CRACK PER SRM 51-10-1 AT WS 629 LOWER STRINGER 8 OF WING RIB. INSTALLED WING INSPAR RIB REPAIR AS PER SRM 57-10-5 7075-T6 .090 LOT NR P13110848 9 INCH BY 3.5 INCH AT RT WING LOWER FLANGE WS 629 STRINGER.