As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6403 JFK-BNA, ON GROUND HEAVY MAINTENANCE VISIT AT BNA FOUND FWD SERVICE DOOR FAILED TO DEPLOY DURING EMERGENCY CONFIGURATION CHECK. ASSEMBLY PLATE WAS FOUND IN THE DISARMED POSITION AND SAFETIED TO KNURL SCREW. REARMED CONTROL PLATE IAW AMM 52-41-51.