I have similar challenges with my flying AI in which the path calculated is not always achievable for my AI, due to drag etc. I use line traces to steer my AI a bit in the right direction to take into account the drag. I think you have to do something similar as suggested by which is ignoring the wings and trying to decide how to rotate when you are flying. The risk is that you get a solution in which there is no way to rotate your AI, but i would expect these to be rare and you can probably ensure those spots are marked as not accessable manually (placing a 1x1x1 volume on those spots for example)