As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING B INSPECTION FOUND THE LAVATORY CENTER BEAM GUSSET CORRODED. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED CORRODED LAVATORY CENTER BEAM GUSSET, DRILLED AND INSTALLED NEW LAV GUSSET IAW EMB SRM 51-40-02 51-20-03. LEVEL OF CORRSION NOT SPECIFIED. THE AIRCRAFT WAS RETURNED TO SERVICE.