Reply #195: There was no "AVGAS" [View All]

[MercutioATC]

AvGas is used in piston engines.

I believe what you want to know is where the "Jet-A" went.

"The wing fuel tanks are located primarily within the inner half of the wings. The center of gravity of these tanks is approximately one-third of the wing length from the fuselage. Considering this tank position and the physical evidence of the length of each wing that could not have entered the building, it appears likely that not more than half of the fuel in the right wing could have entered the building. While the full volume of the left wing tank was within the portion of the wing that might have entered the building, some of the fuel from all tanks rebounded upon impact and contributed to the fireball. Only a portion of the fuel from the left and right wing tanks and the center fuselage tank actually entered the building."

http://www.pubs.asce.org/ceonline/ceonline03/0203feat.html

There's your answer.