Uh to weaponize it 
Well, yes I was leading around to that, but the question is, in what form? Pack it full of tnt like they did with worn out B17s during WWII? If you are just going to use it for blunt force trauma against a target it is better to do it just after you get control of the craft.
Another consideration, if you are going to pack it with explosives, you have to do it somewhere.