As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON SHORT FINAL, AT 500 AGL, HARD RT UNCOMMANDED V ROLL REQUIRING PILOT TO OVER POWER WITH HIGH CONTROL PRESSURE. AILERON TRIM INDICATOR ALWAYS NEUTRAL. AUTOPILOT OFF AT THE TIME, ACFT BEING HAND FLOWN. LANDING UNEVENTFUL. PERFORMED GVI OF ROLL CONTROL SYS/CABLES AND REPLACED THE AILERON SERVO. OPS CKS GOOD. NO DEFECTS NOTED. RETURNED TO SERVICE.