As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MAINTENANCE BASE VISIT INSPECTION FOUND CENTER SERVICE DOOR SILL TO HAVE CORROSION AROUND THE NUT PLATES. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND INSTALLED NEW CENTER SERVICE DOOR SILL IAW SRM 51-40-02. THE AIRCRAFT WAS RETURNED TO SERVICE.