As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A SCHEDULED INSPECTION THE LEFT HAND OUTBOARD AFT FLOOR SUPPORT FRAME UNDER THE LAVATORY SINK WAS FOUND TO BE CORRODED. MAINTENANCE REMOVED AND REPLACED THE LAVATORY FLOOR FRAME SILL IAW EMB SRM 51-40-02, THE REPAIR WAS SATISFACTORY. THE AIRCRAFT WILL BE RELEASED UPON COMPLETION OF INSPECTION.