As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLOORBEAM 1681.18 UPPER CAP LOWER SURFACE BOTH FWD AND AFT FLANGES HAVE CORROSION ON AND AROUND NUTPLATE ASSY. REMOVED NUT PLATE ASSY IAW SRM 51-40-02. FABRICATED NEW NUT PLATE ASSY IAW SRM 51-40-01. INSTALLED NEW NUT PLATE ASSY STA 1681.8, IAW SRM 51-40-02. MAJOR REPAIR.