What was found
WHILE IN "C" CHECK, AFT CARGO BS 1070 STR 28L-29L FWD FRAME FLANGE HAS CORROSION. REMOVED CORROSION IAW B727 SRM 51-10-6. REMOVED FASTENERS TO GAIN ACCESS TO AREA IAW B727 SRM 51-30-2. ORIGINAL MAT .063 IAW B727 SRM 53-10-2 FIG 5, MAT LOSS .008, REMAINING MAT .055. FOUND OUT OF LIMITS IAW B727 SRM 53-10-1 FIG 1. CUTOUT DAMAGED AREA DIM 5 1/4" BY 4" IAW B727 SRM 53-10-4 FIG 11. FABRICATED NEW SHEAR TIE (CONTINUE ON NR 053972) FROM 7075T6 .071 PO NR 9004940 DIM 5 1/4" BY 4" IAW B727 SRM 53-10-4 FIG 11 AND 53-10-2 FIG 5. TREATED AND PRIMED AND PRIMED PARTS AND AREA IAW B727 SRM 51-10-2 AND INSTALLED SHEAR TIE REPAIR AT AFT CARGO BS 1070 STR 28L - 29L IAW SRM 53-10-4 FIG 11 AND 51-30-2.