As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN DESCENDING AT HIGH SPEEDS (270KIAS AT 14000') RUDDER APPEARS STIFF ; POPS-FREE. RUDDER OPERATES NORMALLY AT LOWER SPEEDS (IE250 & BELOW). LANDING UNEVENTFUL. INSPECTED AND FOUND RFTU WITH RESISTANCE TO MOVEMENT, REPLACED RUDDER FEEL UNIT AND PERFORMED DETAILED INSPECTION OF THE RUDDER CONTROL SYSTEM, ALL POST MX TEST CHECKED GOOD. TEST FLIGHT OK.