The History Channel has already broadcast a documentary on 558 which is being repeated next Friday night and Saturday morning apparently.
Discovery Wings was "replaced" by Discovery Turbo, but despite this supposedly covering a range of transport programmes it is 99% full of repeated car related shows - other than occasional repeats of Martin Shaw's aviation series, A Year in The Life (Blue Angels) and A Plane Is Born.
Talk about cheap broadcasting - look at the weekend schedule if you get the chance sometime - occasionally the whole weekend will be devoted to repeats of just one programme and this actually repeats itself during said weekend. Shocking!