What was found
DURING FLIGHT TRIM JUMPS AND AIRCRAFT PITCH ATTITUDE CHANGES ABRUPTLY. HAPPEN WITH AP ON EITHER SIDE. AT FREEZING TEMPERATURES, TRIM WHEEL IS VERY DIFFICULT TO MOVE. ON GROUND AND WARMER TEMPS IT MOVES FREELY. REMOVED AND REPLACED ELEVATOR TRIM ACTUATORS ON LEFT AND RIGHT SIDES WITH SERVICEABLE UNITS IAW MM 27-32-02. P/N ON RIGHT 5299-1, S/N ON 043330, S/N OFF 834, P/N ON LEFT 5299-1, S/N ON 830, S/N OFF 734.