In my Cold and Dark start for the 747 Isince cockpit is basically one of those) What I think you are asking is something in the FMS. Plane has no clue where it is, since power to INS has been off. It must know where it is, once it does, then lots of things sort of go away. I can send you message with the file if you want. Not sure I fully understand what you were mentioning.
There is a UKLIV version of the C-17 on flightsim.to.
C-17 Globemaster Updated flight model » Microsoft Flight Simulator
I downloaded it and it’s got the 747 cockpit/sounds and sorta flys like one, but not bad. It too loses altitude in turns, AP seems to bring it back. The same autopilot errors in basic 747 are present in this one.
I am wishing for a real C-17 modeled and introduced into this sim. If you look at real videos of the plane on YT, the cockpits look very different from even the X-Plane Vartivia edition which is more modeled than the FSX version. Yes, time is money, so let me be the first to ask Plane develpers to get a project started on C-17, and not sure how much but if Quality Wings did it would pay their price, as they just do excellent work. I have contacted two different developers about this plane and they did not say no, but expressed opinion, all developers make what they like more so than what is possibly desired by users. There is great interest in the Airlift Command Sim Group on discord, with lots of information there.
If anyone knows of good cargo loading modification please advise here, I can put weight on plane in XP, but not in MSFS as I know of. I would like to be more real life and put cargo on board which can be delivered to location and off loaded. And not to pick but we need more avitars in choices, since now MSFS is getting into the military planes they need to be real for that.