bernd
I cannot even infer the point you may be making. The AD is working?
It is not? It may be working? Give it time? What is your point?
AF
Delta's Idle melting excursion cost 8,000 feet. Could it have been more?
Have you seen the terrain they were flying over? At 31,000 feet they could Glide what, 90 miles? Not enough. At 31k feet, they were at most 19,000 feet AGL, Get my point?