From the press conference again
A typical take off weight for the aircraft would be of the order of 362 tonnes
The takeoff weight that was entered was 100 tonnes less.
The takeoff weight on the paperwork given to the cockpit was correct.
The error was made in the cockpit whether human or by the laptop in computing the figures.
Comment as SLF, but with a very much a technical backgound. A takeoff weight that is almost 40% more than that entered into the systems is a hell of a difference. The professionals would be able to say what that would mean in terms of the accident.