As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA - DURING C-CHECK, CORROSION WAS FOUND ON THE FLOOR BEAM BS 400, LBL 51 ON THE LOWER SURFACE OF THE LOWER AFT FLANGE. THE CORROSION IS CONCENTRATED AROUND THE FASTENER HOLES USED TO SECURE THE CEILING PANEL. REPAIRED PER EA 5310-10433 AND BOEING TELEX ASA-SEA-96-0176RR. (M)