What was found
DURING DESCENT THRU 10,000, AIRCRAFT BEGAN A ROLL TO LEFT, AUTOPILOT DISCONNECTED AND AIRCRAFT CONTINUED TO ROLL UNTIL RIGHT AILERON WAS APPLIED. DURING ROLL EVENT, AIRCRAFT HAD A MILD SHAKING. MAINTENANCE FOUND LATERAL CONTROL SPOILER POWER CONTROL VALVE ARM LOOSE. SECURED ARM IAW DC-8 AMM 27-62-09. LUBED AILERON CONTROL CABLES ON LEFT WHEEL WELL IAW DC-8 AMM 20-17-00. OPS CHECKED AILERON. SYSTEMS WORKING NORMAL IAW DC-8 AMM 27-11-00.