It certainly isn't the worst thing (I wouldn't be running DC-10s at all if the game had a more robust way of modeling payload-range where takeoff distance was another variable instead of a fixed number, but with the takeoff performance as it is in-game there isn't an L-1o11 model that meets my needs), but the hardest part of correcting it is just finding a free use photo of an actual -15.
I would have assumed this would go in the issue tracker but when I did a cursory check to see if it had been brought up before, another poster discussing aircraft images was directed to this forum instead and there's at least one other thread in this forum dealing with aircraft images.