[asd4232]

The ER vs LR thing is easy to explain. The most realistic Boeing 777 simulation addon available for Microsoft FS at the time included only 200LR and 300ER models, so using 200LR would have been pretty much the closest option to 200ER available with all the systems modelled in high detail.

Besides, the two aircraft don't have that much of a difference in fuel burn. A professional 777 captain could certainly figure out how far the fuel on 200ER could get him.

Of course the FS data doesn't prove anything, but I can't see how the aircraft could have ended up where it ended without any input from either pilot. If both pilots died you would certainly expect a more straight flight-path.