777's use some Ti flame shields .
The flame retardant and shielding and the fact that the seats on a 777 are supposed to take 16 G's without popping off their bolts made a crash like this surviveable. Imagine if it were one of the old generation DC-10's?
This one lost its tail, skidded down, then almost totally flipped over (not quite) then flames that melted the top of the fuselage. That jet that climbed too high out of Kbul a few weeks ago just pancaked and blew up.
I was amazed that so few people were actually killed. (HOWEVER) the trauma of spine crushing is gonna probably leave a lot of people disabled for a long time (maybe life)