What was found
DURING CHECK, INSPECTION DISCOVERED THE LT WING FIXED LEADING EDGE RIB 17 TO RIB 22 SKIN, P/N 170-31033-021, CRACKED AT THE SLAT 2 TRACK 5 CUT-OUT (REF ETD2018-170-095194, FIGURE 1). THE LENGTH OF THE CRACK EXCEEDS THE REPAIRABLE LIMITS PROVIDED IN SRM PART II 57-49-01/REPAIR 06P. THIS EO IS BEING ISSUED TO PROVIDE INSTRUCTIONS TO ACCOMPLISH A PERMANENT REPAIR OF THE CRACKED LT WING SKIN. REMOVE THE CRACK AND INSTALL A SINGLE INTERNAL REPAIR DOUBLER PER ETD2018-170-095194. ACCOMPLISHMENT OF THIS EO HAS BEEN CLASSIFIED A MAJOR REPAIR.