As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AILERONS COMPLETELY FROZEN IN FLIGHT. DISCONNECTED AUTOPILOT, NO ROLL CONTROL. DESCENDED TO FL310 TO REGAIN CONTROL & ROLL BEGAN TO IMPROVE. REGAINED FULL CONTROL AT FL250. REMOVED AFU & INSTALLED A NEW UNIT. OPS CHECKED GOOD WITH NO DEFECTS NOTED IAW AMM 27-10-35.