Interesting problem. I think the distortion must be due to the obliqueness of the photo. Look at the chromatic distortion along the edges, as if the image is stretched out.
As for the angle of the plane, consider the shadows of the two white structures immediately below the plane. These pipes are presumably flat. We see a similar angle of sunlight on the turning bridge to the south.
Now look at the shadow made on the port wing. I think it's possible that the plane is level, judging by these shadows.
Still, though, a cool map weirdness.