What was found
AFT CARGO LEFT 'Z' CHANNEL HAS CORROSION AROUND FASTENER HOLES ON STA 747 TO 767<[01] REMOVED CORROSION ON AFT CARGO LEFT Z CHANNEL; FOUND OUT OF LIMITS AND REMOVED; FABRICATED MATERIAL USED: BAC1496-377 7075T6 AND INSTALLED NEW LEFT Z CHANNEL. PER SRM 51-10-02-0G-0; PER SRM 53-00-53-1A-2; PER SRM 51-40-02-0G-0; PER SRM 51-40-05-0G-0; PER AMM 51-21-41-370-803; PER AMM 51-21-72-370-804; PER AMM 51-21-73-370-804; PER SRM 51-40-10-2R-0; PER AMM 51-21-91-620-802 AND DWG# 146A7502 SHEET 27.;[02] REMOVED CORROSION ON AFT CARGO LEFT Z CHANNEL; FOUND OUT OF LIMITS AND REMOVED; FABRICATED MATERIAL USED: BAC1496-377 7075T6 AND INSTALLED REPAIRED LEFT Z CHANNEL. PER SRM 51-10-02-0G-0; PER SRM 53-00-53-1A-2; PER SRM 51-40-02-0G-0; PER SRM 51-40-05-0G-0; PER AMM 51-21-41-370-803; PER AMM 51-21-72-370-804; PER AMM 51-21-73-370-804; PER SRM 51-40-10-2R-0; PER AMM 51-21-91-620-802 AND DWG# 146A7502 SHEET 27.;[03] VERIFIED STEP 2.