As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPPER NOSE GEAR FITTING FOUND LOOSE. A SHIMMY PROBLEM WAS REPORTED WHEN THE MECHANIC WAS REMOVING THE NOSE GEAR FOR STEERING COLLAR SHIMMING. INVESTIGATION FOUND THE AIRCRAFT HAD A SHIMMY PROBLEM FOR SEVERAL HUNDRED HOURS AND WAS NOT REPORTED.