As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MAINTENANCE INSPECTION, FOUND THE LEFT OUTBOARD SILL CORRODED IN THE LAVATORY AREA. THE AIRCRAFT HAS BEEN REMOVED FROM SERVICE. REMOVED AND REPLACED THE LEFT OUTBOARD SILL IN LAVATORY IAW EMB SRM 51-40-02. THE AIRCRAFT WAS RETURNED TO SERVICE.