What was found
EXCESSIVE RUDDER AND TRIM, NEEDED 4 UNITS LT RUDDER TRIM AND 3 UNITS LWD TRIM PLUS YOKE INPUT, TO MAINTAIN WINGS LEVEL. EMERGENCY EQUIPMENT REQUESTED. A BROKEN NR 6 SPOILER CONTROL CABLE (WSB2-4) INHIBITED FLIGHT SPOILER MOVEMENT OF THE NR 6 SPOILER CREATING AN ASYMMETRICAL AIR LOAD ON THE WING SURFACES. THE SUBJECT CONTROL CABLE WAS REPLACED, RIGGED, AND TESTED PER 737 MM 27-61-00 AND ALL CHECKED GOOD. THIS IS CONSIDERED AN ISOLATED INCIDENT. CLEANED AND LUBRICATED AT EVERY 'C' CHECK AND REPLACED AT A 2 HMV FREQUENCY. THERE IS NO HISTORY OF PREVIOUS FAILURES OF THIS OR OTHER FLIGHT CONTROL CABLES AT SIMILAR LOCATIONS.