Floating Model Issue

Hello, I’ve got a model here with a few parts in it.
One of these parts, named Engine, has a bodygyro and a bodyposition parented to it.
Now I have added controls to move it, but when its not moving, it’s slowly moving downwards.

Why is this? and how can I make it come to a complete stop?

If more clarification or pictures are needed, I’ll provide.

Could you show me Bodygyro properties?

@Conejin_Alt