As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, AFTER GEAR RETRACTION, VIBRATION FROM NOSE LANDING GEAR AREA. RECYCLED GEAR, NO HELP. VIBRATION INCREASED WITH AIRSPEED INCREASE. WHEN AIRCRAFT WAS YAWED VIBRATION WENT AWAY. AIR TURNBACK. ON LANDING WHEN NOSE GEAR TOUCHED THE GROUND A CLUNK WAS HEARD. FOUND LEFT NOSE LANDING GEAR DOOR ACTUATOR STICKING. LUBED FORWARD NOSE LANDING GEAR DOOR ACTUATOR. NO OTHER DEFECTS NOTED.