What was found
AFT CARGO COMPARTMENT RH Z CHANNEL HAS AREA'S OF CORROSION FROM STA 727+13 TO 767; RBL 21; WL 157. (MARKED) / CORROSION ON AFT CARGO RH Z CHANNEL FOUND TO BE OUT OF LIMITS I.A.W. SRM 53-00-53-1A-2. REMOVED Z CHANNEL FROM STA 727 TO 767 IAW. SRM 51-40-02-0G-0. FABRICATED Z CHANNEL FROM BAC 1496-377 7075 T62 IAW SRM 53-00-53-2R-5; SPLICE LOCATED AT STA 727F+11.40'. INSTALLED Z CHANNEL IAW SRM 57-40-02-0G-0 AND BOEING DWG 146A7500 REV:-.