I've just tried a controlled experiment replicating the disaster
with a scale tower block made of lego
and and airfix plane filled with parafin..

and the result was a sticky molten mess on the carpet
and black noxious choking smoke..

I'm not really sure what to conclude..

But I couldn't find any remains of bodies, terrorist or otherwise..

[I employed civilan figures from my Dads train set
and airfix Bedouin warriors for the hijackers]

now I need to open all the windows before mum comes home from the shops.

don't know what to do about the carpet though..

Hope this helps support or disprove any theories.