As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MBV INSPECTION, QA FOUND THE SERVICE DOOR CENTER SILL CORRODED. AIRCRAFT WAS REMOVED FROM SERVICE FOR MBV INSPECTION AND WILL BE RETURNED TO SERVICE AFTER MBV INSPECTION. PERFORMED PERMANENT REPAIR ON SERVICE DOOR CENTER SILL IAW ERS-EM-53MR-2501. AIRCRAFT WILL BE RETURNED TO SERVICE AFTER MBV INSPECTION.