What was found
(CAN) STAB TRIM STIFF WHEN COLD, PILOT SUSPECTED AFT TRIM DRUM INSPECTION OF COMPLETE CONTROL SYSTEM. FOUND CABLE (NR 62701-135) FRAYED OVER 60 PERCENT AT AREA OF ELECTRIC AUTOPILOT MOTOR. SUSPECTED LOW TEMP AND LOW CABLE TENSION CAUSED CABLE TO JAM AROUND THE SEVERED PULLEY WINDINGS AT THE TRIM MOTOR. NEW CABLE INSTALLED TO CORRECT TENSION AND SYSTEM FUNCTIONS NORMAL. ELECTRIC TRIM MOTOR HIDDEN FROM DIRECT VIEW UNDER AFT EDGE OF CARGO AFT WALL.