The organization Pilots for 9/11 Truth has closely analyzed this claim and has now released a technical document that demonstrates with calculations and animations how it is physically impossible for an aircraft on an approach as reported by the witnesses presented to transition to the required south side approach in order to cause the physical damage. The observed damage begins with 5 downed light poles and also includes the generator trailer, the outer damage to the facade of the building, leading all the way to the curious round hole in the C-ring of the Building. The transition from the north to the south path is impossible primarily due to the G forces required as well as required bank angles that are irreconcilable with the physical damage observed.
The interviews with this large group of independently corroborated credible witnesses, several of whom were on the gas station property and therefore in the absolute best location to judge which side of the station the plane flew, demonstrates that they could not have been mistaken regarding the fact that the plane flew on the north side.
While it's rather easy to be convinced of the veracity of the witness claims after viewing their interviews, some have been reticent to accept the astronomical implications and have entertained the notion that somehow the plane transitioned from the north to the south path in order to cause the physical damage as observed and reported. This latest document by Pilots for 9/11 Truth establishes with physics and math that the plane could not possibly have performed this maneuver. The necessary G forces and required bank angle of the plane definitively rule out the notion that a plane on this course could have remained intact before reaching the building and/or caused the physical damage as observed.
Or in pdf format here: