Academic question only -- I heard yesterday a family member saying that according to their husband/child who was on board that "everybody is running to the front." If it was true that everyone in coach ran into first class, would that have effected the CG so much that the plane would have been unflyable?
I dont think that would be enough to seriously upset the CG of the aircraft. Granted anytime anything moves on an aircraft it shifts the CG, but not consequentially.
What I gather from the transcript is when they start saying "roll it?" at that point the terrorist augered the plane in because they knew they had lost control.