The AFM limitation for Challengers is clear--no VNAV using QFE altimetry. Why is this in doubt?
It is so! I agree and comply with it. The argument from my colleague, came from explaining the reason behind this statement.
In my opinion the reason not to use VNAV in QFE operations is ,that because it will violate obstacle clearance of each waypoint. That is why Collins put that into the limitation.
I wanted to see others opinions on that as well. I am really interested in how the FMS was programmed.
Again,I am just thinking out loud here,so if I'm wrong please correct me.
Happy Holidays,
Cskafan