What was found
***CORROSION*** AFT CARGO PIT Z CHANNEL L/H SIDE FROM BS 807 TO BS 727F LBL 25 WL 156 HAS CORROSION / AFTER EVALUATION OF CORROSION DAMAGE ON THE AFT CARGO L/H 'Z' CHANNEL STA 727F TO 847 LBL 25 WL 156 FOUND TO BE OUT OF LIMITS IAW SRM 53-00-53-1A-2. REMOVED DAMAGED SECTION OF 'Z' CHANNEL AND INSTALLED REPAIR PARTS FROM STA 727F TO 847 LBL 25 WL 156 IAW SRM 53-00-53-2R-5; SRM 57-40-02-0G-0; DWG 146A7500 AND DWG 146A7502.