What was found
IN DESCENT FLIGHT MAP TRIM FAIL AP DISCONNECT. AIRCRAFT PITCHED UP. DIFFICULT TO CONTROL PITCH. TO DESCEND, IT TOOK ALL NOSE DOWN TRIM AND FORWARD YOKE PRESSURE, (AP TRIM SEVO NOT ILLUMINATED WHEN LOOK AT IT). INSPECTED AND FOUND LEFT ELEVATOR TRIM ACTUATOR JAMMING AND NOT ALLOWING FULL NOSE DOWN TRIM. REMOVED AND REPLACED LEFT ELEVATOR TRIM ACTUATOR PER MM 27-32-02 AND ADJUSTED RIGHT ELEVATOR TRIM TAB. AIRCRAFT TRIM OPERATIONAL CHECKS GOOD.