Won't. It is difficult to because a variety of reasons are caused,land, especially when crash, the plane should be in sky dropt fuel, in the sky be in every airport all round the airspace that sets lash-up to put oil. The height that put oil is in commonly the space of 300 meters of above, before such fuel are falling to the ground, volatilize entirely in sky already, won't cause fire because of this. Putting oily end is the weight that reduces a plane is mixed reduce insecure element to make sure safety lands.
