What was found
ACTUATOR CAUTION CAME ON IN FLIGHT. WAS UNABLE TO RESET ON THE GROUND. (ASSOCIATED CAUTIONS : YAW SAS, BACKUP SAS, AP1, AP2, ROLL CAUTION). DURING TEST FLIGHT EVALUATION, AP TEST REVEALED AP1 ACTUATOR AND AP2 ACTUATOR. AUTOPILOTS WOULD NOT ENGAGE, CYC TRIM AND YAW TRIM OFF. RESET AP1/AP2 CB, FAULT STILL REMAINED AFTER COMPLETING AP TEST. REMOVED AND REPLACED YAW FOG GYRO IAW AMM 22-10-00,4-5. T/F SUCCESSFULLY COMPLETED IAW FLM.