What was found
DURING C-09 CHECK INTERGRANULAR CORROSION WAS FOUND AROUND NUT PLATE HOLES ON FLOOR STRINGER IN AFT CARGO COMPARTMENT BS 1500 TO BS 1560, LBL 18 TO RBL 18. MAINTENANCE CUTOUT CORRODED AREAS OF FLOOR STRINGER BS 1500 TO BS 1560, LBL 18 TO RBL 18; FABRICATED REPAIR PLATES AND FILLERS; INSTALLED REPAIR PARTS IAW B757-200 SRM 51-70-12, PG. 1, FIG. 1.