As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LCQ - MAJOR REPAIR - DURING C-09 CHECK INTERGRANULAR CORROSION WAS FOUND AT NUT PLATES ON LOWER SIDE OF AFT CARGO COMPARTMENT FLOORBEAM BS 1500 TO BS 1540, LBL 9. MAINTENANCE REMOVED DAMAGED SECTION OF CARGO FLOORBEAM FROM BS 1500 TO BS 1540, LBL 9; FABRICATED A REPAIR ANGLE AND CHANNEL; INSTALLED REPAIR PARTS IAW B757-200 SRM 51-70-11, PG 1-6 FIG 1.