As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, THE CREW EXPERIENCED A VIBRATION IN THE NOSE SECTION OF THE AIRCRAFT. A GEAR DOOR WAS OBSERVED BY GROUND PERSONNEL AS REMAINING OPEN WHEN THE GEAR WAS RETRACTED. FLIGHT 4044 RETURNED TO CAK. MAINTENANCE INSPECTED AND PERFORMED SEVERAL GEAR SWINGS IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 32-00-00. NO DISCREPANCIES WERE FOUND. THE AIRCRAFT WAS THEN RELEASED FOR SERVICE.