What was found
AT FL 400, AUTOPILOT DISENGAGED, DISCOVERED THE AILERON TRIM ALMOST UNMOVABLE. ABLE TO MOVE TRIM WITH EXCESSIVE FORCE. DURING POST-FLIGHT, AILERON TRIM MOVES FREELY. POSSIBLE FREEZING ISSUE AT ALTITUDE. CHECKED AILERON TRIM TENSION & AILERON WING CABLE TENSION, AILERON TRIM CABLE TENSIONS ARE SUPPOSE TO BE 20 +/- 3LBS. AILERON TRIM CABLE TENSIONS ARE AT 23LBS. AILERON WING CABLE TENSIONS ARE SUPPOSE TO BE AT 30 +/- 5LBS. AILERON WING CABLE TENSIONS ARE AT 33LBS. CLEANED GREASE FROM BORES OF ACTUATOR. FOUND EXCESS WATER IN GREASE, FOUND TRIM CHAINS CAKED WITH GREASE & WATER. CLEANED CHAINS AND CHAIN. GREASED ACTUATOR AND CHAINS TRIM OPERATED SMOOTH NO GRINDING NO BINDING, DONE IAW CMM 27-10-06.