For the life of me I can't get the 727 Super 27 to follow a flightplan with the GNS-XLS. When I select NAV the VOR/LOC lights turn on red instead of green, even while exactly on the route. Maybe someone can look at the screenshot and notice something I am doing wrong. Here I tried going Direct to the next waypoint in the plan but that didn't work either. I have no problem in the non-super model using the exact same imported flightplan and using the GNS530. In the Super 27 the GNS-XLS is the only option. All the other AP modes work fine. thanks

Edited February 20Feb 20 by desbean

Your HSI nav source needs to be set to GPS. 

8 hours ago, T_Bone said:

Your HSI nav source needs to be set to GPS. 

Thanks, there doesn’t appear to be an HSI option in the GNX-XLS like there is on the GNS530. Just that NAV/GPS toggle switch on the upper center panel. I have that that on GPS if that’s what you mean. Thank you.

Solved. The nav source is changed by using the Course button on the unit.