Well, to be honest, the photo is really out of focus. But of course it isn't easy taking a tack sharp picture out of a plane window!
The sky is just georgous!! Did you use a gradiant filter or did it natually have the pink color in it?
The wing seems to just blend in with the background. Since it is the wing that is your subject, it should be in focus and stand out from the background. Try a narrow aperture setting (if possible-I am not familiar with your camera). With a higher number aperture setting your would have been able to get more the whole wing in focus. It may have been better to sit and wait for a better background, one with colors that do not blend in with the plane. That might not have been possible though.
Overall, I actually like this photo. I love the colors. Nice work and better luck next time.
The portion of the wing in the bottom left of the frame looks a little soft. I always feel that this type of shot is crying out for all of the wing to be in sharp focus.
The light on the clouds is very beautiful. But the picture appears to be more of a snapshot, IMHO. The lines of the wing aren't leading the ey anywhere.