Blimey
Never ever seen a 300 ( this looks like a 269B) with no mast tube on let alone the disc completely missing, where has it gone ??? Even more so when you consider the rear x beam has done its job and collapsed, either the disc came off in flight and luckily the ac landed upright( unlikely) or the impact was so severe the blades drooped down and cut off the cabin and the mast failed ( more likely) as there is a chunk of horiz stab missing, so disc came off going backwards or to one side taking out the stab)
Think they were rather lucky