Machinbird, what would it take to throw something four football fields? Answer that and I'll entertain your notion.
I'd rather expect they were large more or less flat surfaces that could have flown a little as well as fluttered on their way down. That might be pieces of one of the wings. Then, again, it might not. But, THROWN more than four football fields? About the only thing that had a prayer of being thrown that far would be the VS. And we know where it was found.
JD-EE, the one fair sized piece up to the North almost certainly had to be a float-sink event.
The large parts significantly away from the centerline are more what I'm interested in. They are located roughly in the center of the field E-W and are in a rough N-S alignment and located over a greater distance than their original location on the aircraft would account for.
AUV-EE's comment about items circling or spiraling in their descent applies. There is nothing to stabilize them except their own rotational inertia. Only when you begin to consider ship size objects do these inertial stabilization effects become really significant (really big circles).