What was found
CRACK DAMAGE ON THE RT HORIZONTAL STABILIZER RIB 14 (TIP RIB), P/N 170-62620-002, (REF PHOTOS 1 AND 2 FOR TYPICAL CRACK DAMAGE). THE TYPICAL CRACK DAMAGE IS LOCATED AT THE AFT MOST FASTENER HOLE THAT ATTACHES THE RIB 14 TO THE RT HORIZONTAL STABILIZER UPPER SKIN, P/N 170-62726-016. THIS EO IS BEING ISSUED TO PROVIDE INSTRUCTIONS TO ACCOMPLISH AN ON-CONDITION PERMANENT REPAIR OF CRACK OR OTHER DAMAGE ON THE RT HORIZONTAL STABILIZER RIB 14 (TIP RIB), P/N 170-62620-002, BY REMOVING AND REPLACING THE DAMAGED PART. ACCOMPLISHED IN ACCORDANCE WITH THE DRAWINGS LISTED IN TABLE 2 AND SRM CHAPTER 51 STANDARD PRACTICES. THIS EO HAS BEEN CLASSIFIED BY ENGINEERING AS A MAJOR REPAIR DUE TO STRENGTH RESTORATION.