What was found
(CAN) IN FLIGHT , THE AIRCRAFT PITCH UP SUDDENLY WITH THE AUTOPILOT AND YAW DAMPER DISCONNECTING AT THE SAME TIME. THE CREW REPORTED NO TURBULENCE AT THE TIME OF DISCONNECT, CDS FAULT DISPLAYED `APAU-R/FGM1` AND `FGM1/FGM2`. MTC REPLACED THE #1 FLIGHT GUIDANCE MODULE, THE RETURN-TO-SERVICE FUNCTION TEST OF THE AUTOPILOT WAS COMPLETED SERVICEABLE. THE AIRCRAFT RETURN TO SERVICE WITH NO FURTHER FAULT NOTED. (TC# 20190522013)