As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING 2C INSPECTION TASK 5310-131-O1I REVEALED CENTER BUTTPLATE TO HAVE SPOTS OF CORROSION THAT WERE BEYOND LIMITS. REMOVED CENTER BUTTPLATE AND INSTALLED SERVICEABLE BUTTPLATE USING EMB120 SRM STANDARD PRACTICES AND AERODESIGN REPORT NR 1671-1.