Need help figuring out importing animations from blender

Hi, i'm messing around with modeling and animations, i made this plane with control surfaces in blender (plane and control surfaces are divided into multiple objects) and rigid them using empties and constraints, i exported the model with an animation of flaps deploying in to a fbx and imported it to unity. in unity the control surfaces were moving but they floated above the wing. I tried looking it up and just messing around with the export setting but nothing worked although there were changes in where the control surface was floating and in the way it moved. i'd be happy to supply the blend file but i don't know how to do that. any help would be appreciated, also alternative approaches are also welcome as i'm somewhat new to both worlds. Thanks in advance!