Vehicle supplies fixes a tank's tread, but we cant put some gum in an oil leak and some 409 on the windscreen and go back. 
+1
perdweeb
maybe we'd have a reason for hangers... but i'd only say yes to this if it was a realistic time period for the repair. instead of 30 seconds, try 15 minutes/20 minutes for the repair. and during this time you cannot land to avoid the vulch or move at all due to the fact the plane is being repaired (and the plane would not be flyable). 15-20 minutes is about the time for a fighter run, so i don't see the problem here if players REALLY REALLY need the extra score