As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MAINTENANCE INPECTION FOUND THE BUTTSTRAP BETWEEN FR 13 - 14 CORRODED. THE AIRCRAFT WAS REMOVED FROM SERVICE. REPAIRED BUTTSTRAP BETWEEN FR 13 - 14 IAW EMB SRM 53-00-02. LEVEL OF CORROSION NOT SPECIFIED. THE AIRCRAFT WAS RETURNED TO SERVICE.