What was found
A/C FAILED AUTOPILOT TEST; YAW SAS AND BACKUP SAS ACTUATORS. A TEST FLIGHT EVAL FOUND AUTOPILOT FAILS SELFTEST. INDICATES AP1, YAW SAS, ACTUATOR, BACKUP SAS ALTERNATING WITH AP2, YAW SAS, ACTUATOR, BACKUP SAS. ON THE CAD VEMD AFCS SUBSYSTEM FAILURE CODES INDICATE 1 FAIL AND 2 FAIL. AN AMBER Y INDICATES ON THE PFD. AUTOPILOT TEST WOULD NOT COMPLETE DUE TO FAILURE. REMOVED AND REPLACED SEMA ACTUATOR IAW AMM 67-20-00, 4-14. MTF/MOC SUCCESSFULLY COMPLETED, NORMAL OPERATION NOTED.