As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EXCESSIVE VIBRATION FROM NOSE GEAR OCCURRED DURING GEAR RETRACTION AFTER TAKEOFF. FLIGHT RETURNED TO SDF AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED AND FOUND NOSE GEAR DOORS OPEN. REPLACED LEFT AND RIGHT NOSE GEAR DOOR ACTUATORS AND SECURED DOORS, OPERATIONAL CHECK NORMAL ON GEAR SWING.