Now back to speculation,
Regarding all this, it seems like after plane has lost its fuselage behind wings, its broken fuel tanks fuelled a large fireball around the plane. While remaining plane was falling backside down. It takes several minutes to fall and burn. If you look at the flames direction then it coincides with the probable falling attitude. The closer to the wings, the more heat damage there is.
Also there was a picture of a separated engine fan having similar sooting and heat damage. Thus, wings and engines must have been inside the fireball of falling plane.
The engine sooting is likely coming in from the front. TWA 800 had soot patterns across the wings at angles corresponding to spinning as it fell.
PA103 snapped its tail off from aero loads generated from the primary break ahead of the wings.
Gyro loads on the engines may be part of the evidence of yes or no?