What was found
AFT CARGO COMPARTMENT R/H SIDE Z-ANGLE STA 727+4 TO 727F RBL 21 HAS CORROSION / BLENDED CORROSION ON AFT CARGO R/H SIDE; Z-ANGLE STA 727+4 - 727F RBL 21. VERIFIED MATERIAL LOSS TO BE ORIG 'T' .040 REMAINING 'T' .031 LOSS OF .009 FOUND TO BE OUT OF LIMITS. REMOVED AND REPLACED Z-ANGLE STA 727+4 - 767 R/H. P/N BAC1496-377-7075 T6 ATAG A35657 IAW B737-800 SRM 53-00-53-2R-5 BOEING DWG 146A7500 REV C SRM 53-00-53-1A-2 TOOL 3 36306 CAL DUE 6/26/20. P/N 146A7502-52.