As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT FWD MAIN CABIN FLOOR STRUCTURE, FLOORBEAM UPPER CHORD ON UPPER AND LOWER SURFACES CORRODED AROUND FASTENER HOLES IN MULTIPLE PLACES, BS 365.25, RBL 0 TO RBL 64. MAJOR REPAIR ACCOMPLISHED: RMV'D CORROSION. FABRICATED & INSTALLED REPAIR ANGLE & STRAP.