As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER LANDING GEAR RETRACTION, VERY NOTICEABLE VIBRATION FROM FRONT PART OF ACFT. INCREASED VIBRATION WITH SPEED INCREASE. LOWERED LANDING GEAR, VIBRATION STILL PRESENT. LANDING GEAR OPERATION NORMAL. FOUND BAD NOSE GEAR DOOR DRIVE LINK. REMOVED AND REPLACED NOSE GEAR DOOR DRIVE LINK IAW DC-10 MM 32-36-01 PG 201. CYCLED DOOR SEVERAL TIMES ON GROUND, OPS CHECK NORMAL.