As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE FS 967 & 986.5 PASSENGER FLOORBEAMS WERE FOUND WITH SEVERAL AREAS OF CORROSION ON THE UPPER CAPS OF THE BEAMS. THE UPPER CAPS WERE TRIMMED OFF TO REMOVE THE CORROSION. NEW EXTRUDED CAP SECTIONS WERE INSTALLED TO REPAIR THE AREAS PER ER/A 383998-14, REV A.