As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PERIODIC CHECK, THE MAIN DECK FLOORBEAM WAS FOUND CORRODED ON THE UPPER SURFACE OF UPPER CHORD AT FS 660, LBL 56. MAXIMUM DEPTH OF CORROSION AFTER BLEND-OUT WAS BEYOND 50 PERCENT OF FLANGE THICKNESS AT SEVERAL AREAS. FLOORBEAM UPPER CHORD IS MADE OF .085 INCH 7075-T6511 EXTRUSION. MADE REPAIR PER EA 66-98000.