Donīt know about the hard landing. But, whatīs evident from the photo is that the upper part on the mid-section fuselage is, burned. If, a fire was caused by the nose collapsing and scraping the runway creating sparks to fly aft and igniting leaking fuel, the underside should also be completely burned? If, the hard landing caused the centre tank to rupture and then ignite it would also have the same result?