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 AFT CARGO COMPARTMENT FLOORBEAM BS 1503-1540, LBL 2. MAINTENANCE REMOVED DAMAGED SECTION OF CARGO FLOORBEAM FROM BS 1503 TO BS 1540, LBL 2; FABRICATED A REPLACEMENT FLOORBEAM AND SPLICES; INSTALLED REPAIR PARTS IAW B757-200 SRM 51-70-11 PG 1-7 FIG 1.