Sorry for the possible silly question but if you have a D-100 with the latest firmware what is the cost of adding the autopilot? Do you just buy the servos or do you need the AP74 as well?
Thanks!
You toggle modes with the soft keys through the menu system; and ALT, HDG, and TRK modes do follow the bugs settings. Take a look at any of the EFIS users guides here for a fuller description of how everything works.