As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING M-CK IN ATL, CORROSION HAS BEEN FOUND ON STA 160 CABIN FLOOR BEAM CAP AFT FACING FLANGE WHERE THE OUTBOARD GALLEY MOUNT IS ATTACHED. IT WAS ELECTED TO TO TRIM THE AFT FACING FLANGE TO REMOVE THE DAMAGE. THE RADIUS OF THE CAP WAS NOT TRIMMED. 7075-T6511