As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF THE FLIGHT CREW RETACKED THE GEARS. THE NLG DOOR DID NOT CLOSE. AIRCRAFT RETURNED TO GSO. AIRCRAFT WAS FERRIED FROM GSO TO STL. MAINTENANCE INSPECTED AND REMOVED AND REPLACED RELAY K0642 DOOR CONTROL RELAY. LANDING GEAR SYSTEM OPS CHECKED GOOD.