Hi, Umberto,
I cannot find any axis assigned to the slew mode, other than what I'm about to post. I was posting this when I got the warning that someone just posted and I need to re-post. So, you and I posted at the exact same time. Is this what you're referring to:
I think I've found the problem here with all the wild spinning and out of control aircraft after pressing the Y key. I no longer have the out of control spinning and wild rotation when I go into slew mode. Here's what I did to solve this problem:
On the left side under Controls, select Axis Assignments. At the top where it says Controller, select your TCA Throttle Quadrent. It should say TCA Q-Eng 1&2. Next to Flight Mode, select Slew. Scroll down and delete the assignments that are shown in the attached image:
This is what I did to solve this problem in FSX. Deleting these assignments stopped the spinning and the wild out of control movements. But I haven't tested the throttle to see if it still works as it should, so I'm not sure if deleting these assignments will affect this device. I've noticed in the axis assignment that the Create New assignment button is grayed out, at least in FSX, and I can't see how anyone would be able to create the new assignments that need to be assigned using the in sim menu, other than using FSUIPC. That just seems strange to me. If anyone wants to return the assignments, clicking the Reset Defaults button should replace the assignments. If this is not what you're referring to or is not the correct way, let me know so that I will take it down. I don't want to pass out information that's not correct.
Thanks for your input.
Ken.