As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FRAME 20RH INBD FLANGE BETWEEN Z=-520 & Z=-460 IS CORRODED AT FLOOR LEVEL IN THE MAIN CABIN. REMOVED CORROSION IAW ECRA 5311-01689 & SRM 51-74-00. NDT NOTED NO CRACKS. AIRBUS APPROVED THIS AS INTERIM MAJOR REPAIR WITH 6 MONTH LIFE LIMIT FROM REPAIR EMBODIMENT.