If this helps, I found lots of good information on how the plane works here using the 605 model docs on smartpilot. It's a very similar, if not identical cockpit and the avionics are the same. Treasure trove of documentation that that solved a few puzzles for me, and I have many, many more to figure out. https://www.smartcockpit.com/plane/BOMBARDIER/CHALLENGER 605.html