What was found
AFT CARGO COMPT, FRAME AT BS 1420, UPPER FLANGE IS CRACKED AT S25L, AND CHAFED AT S23L. REMOVED FRAME ASSY IAW SRM 51-40-02. REMOVED 2 INTERCOSTAL WEBS IAW SRM 51-40-02 AND REMOVED BRACKETS FROM CRACKED FRAME IAW SRM 51-40-02. LOCATED AND DRILLED NEW FRAME IAW SRM 51-40-05. INSTALLED BRACKETS ONTO NEW FRAME IAW SRM 51-40-02. INSTALLED FRAME ASSY IAW SRM 51-40-02. INSTALLED 2 INTERCOSTAL WEBS IAW SRM 51-40-02. BLENDED CHAFED AREA AND FOUND TO BE WITHIN LIMITS IAW SRM 53-00-07, FIG 101, DETAIL 1. THIS REPAIR IS CLASSIFIED AS A MAJOR REPAIR.