As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ITO - FLT 121 - VIOLENT NOSE WHEEL SHIMMY AT APPROXIMATELY 75 KNOTS. APPLIED FORWARD YOKE PRESSURE WITH NOSE WHEEL STEERING INPUT. NO CHANGE. ABORTED THE TAKEOFF. VISUALLY CHECKED NOSE LANDING GEAR AND SURROUNDING AREA. NO DEFECTS NOTED. REMOVED AND REPLACED NOSE TIRE ASSEMBLIES. (X)