10-09-2025, 04:30 AM
There appears to be a conflict between the TDS GTNXi GTN750/650 and the Air Manager GFC 500 Autopilot. Specifically, when the GTN750xi or GTN650xi are running along with MSFS 2024, the heading mode on the GFC 500 Autopilot does not work. Here is some testing that I have done to try and narrow down the issue:
When running the Air Manager GFC 500 in an airplane in MSFS 2024, all lateral and vertical functions work correctly, including the Hdg Mode. When I run the TDS GTNxi app initially, without turning on the 750 or 650, the heading mode continues to work just fine. But as soon as I display the 750 or 650, the heading mode immediately turns off. At this point, only the Nav lateral mode works. I tried adjusting some of the GTN settings including: Change the Nav Source to Flight Simulator vs GTN750. Turn off the "Connect GPS to HSI OBS (Auto-Slew)" option. Turn off the "CDI Key" option. None of these options have any effect with the noted issue.
When running the Air Manager GFC 500 in an airplane in MSFS 2024, all lateral and vertical functions work correctly, including the Hdg Mode. When I run the TDS GTNxi app initially, without turning on the 750 or 650, the heading mode continues to work just fine. But as soon as I display the 750 or 650, the heading mode immediately turns off. At this point, only the Nav lateral mode works. I tried adjusting some of the GTN settings including: Change the Nav Source to Flight Simulator vs GTN750. Turn off the "Connect GPS to HSI OBS (Auto-Slew)" option. Turn off the "CDI Key" option. None of these options have any effect with the noted issue.