As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE IN FOR D-CHECK, MAINTENANCE FOUND CENTER OF STA 344 FLOOR BEAM CORRODED AROUND FASTENER HOLES WHILE WORKING CARD 376276. REMOVED CORRODED PORTION OF FLOOR BEAM THAT WAS PREVIOUSLY REPLACED. FABRICATED REPLACEMENT BEAM PER SRM 53-10-2 AND 53-10-1. INSTALLED REPAIR PARTS PER SRM 51-10-2.