What was found
AFT CARGO COMP. FLOOR STRUCT. FLOOR STRINGER HAS EVIDENCE OF CORROSION AROUND MULTIPLE NUT PLATE HOLE BTW STA 1440 AND STA 1480 APPROX LBL/RBL 16.10, ID STICKER NUM. (085-002). REMOVED 2 EA NUTPLATES AND REMOVED CORROSION AT STA 1470 AFT CARGO COMP FLOOR STRUCTURE FLOOR STRINGER LBL 7.55, ORIGINAL MATERIAL THICKNESS OF .063", AT DEEPEST POINT BLEND WAS .052", EXCEEDED ALLOWABLE 10% LIMIT, MEASURED WITH DEPTH GAUGE #21-987 CAL DUE DATE 29-JULY-2026, IAW SRM 53-00-53-1A-A AND BOEING 757-200PF SRM 53-60-53-0I-1 AND BOEING 757-200PF SRM 51-40-02-0G-0. INSTALLED 01 EA FABRICATED FLOOR STRUCTURE STRINGER P/N 146N5447U13 BATCH 0004468226 IAW SRM 51-40-02-0G-0 AND DWG 146N5447.