I certainly don't think that backlighting will automatically lead to a rejection here. But I would argue that it will have to be seen to add to the overall effectiveness of an image, for it to get through.
I think in this case that might be somewhat optimistic, though it is certainly a nice shot. The lighting may cause some screeners to worry about the area underneath the belly, around the gear, for example. Before even worrying about that though, I would remove those dirt spots from the sky, just above the rear of the 'hump'. I also see another one almost directly above the top of the tail, off to the right, and another at a level half way down the tail, above the middle of the fuselage. But even cleaned up I think you would need to cross your fingers.
All the best.