What was found
WHEN THE CONTROL YOKE IS MOVED LT AND RT THERE IS A RUBBING SOUND COMING FROM BEHIND PANEL AFT OF F/O SEAT. CONTROL YOKE DOES NOT FEEL ABNORMAL. NO ABNORMALITIES CONTROLLING ACFT IN FLIGHT. OPERATED AILERON TO LT/RT FOUND NOISE TO BE COMING FROM ROLL ACTUATOR UNDER COPILOTS FLOOR INSPECTED AILERON AUTO PILOT CABLE RUN FOR DEFECTS, NO DEFECTS NOTED. REMOVED ROLL ACTUATOR IAW 22-11-000-801 INSTALLED SERVICABLE UNIT IAW 22-11-400-801. OPS CHECKED GOOD. NO NOISE NOTED. RETURNED TO SERVICE.