What was found
(CAN) MACH AND STAB TRIM MESSAGE ON CLIMB, PROCEDED WITH STAB TRIM 1 INOPERATIVE, FAULT DISAPEARED, AUTOPILOT ENGAGED, FLT CREW DISENGAGED A/P AT 10,000 FT, FOR MANUAL LANDING, EMERGENCY DECLARED, AIRCRAFT LANDED SAFELY. REPLACED HORIZONTAL STAB TRIM ACTUATOR, OPERATION CHECKED NORMAL.