Modification of the standart BOEING-737-400 on flight distance and some qualities of flight, like this, as the manufacturer of the real aircraft did. All is the old, except for flight data (information included). They are maded to realistically fly to fuel has been limited, since the standard model is clearly a small range, in the middle of a real flight fuel ends. In contrast to the 777 or 747 turns very well.
* It may complain about the critical weight, but this is the norm.