The Little Black Box Isn’t Indestructible. If the black box is the lone survivor of almost every serious plane crash, why isn’t the entire plane made of this magic material? The answer is that a plane made of the same material – steel, that is – would be too heavy to fly. “But Superman does it,” you say. Listen, Superman does a lot of things we can’t explain. The little black box can be destroyed by the crushing weight of airplane wings or an inferno of jet fuel anyway, so really, nothing can save you.