As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
A LOUD VIBRATION WAS COMING FROM NOSE GEAR AREA AFTER TAKEOFF. FLIGHT RETURNED TO DAY AND LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE LEFT NOSE GEAR DOOR OPEN. LATCHED NOSE GEAR DOOR TO SECURED POSITION. AIRCRAFT RETURNED TO SERVICE.