As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE IN FOR SI CHECK, MAINTENANCE FOUND CORROSION ON THE FLOOR BEAM AROUND THE NUTPLATE HOLE FORWARD LOWER SIDE OF THE UPPER CHORD ON THE FLOOR BEAM AT STATION 500, LBL 55 - 57 AND WL 208. MAINTENANCE REPAIRED THE FLOOR BEAM IAW SRM 53-10-8.