bsieker, thanks for your correction on when fuel scavenge starts. With the correction: 13,500kg+13,500kg+900kg of fuel (total) remaining when scavenge started; 10,500kg remaining on approach to LHR (AAIB); difference 17,400kg; fuel being used at a rate of maybe 5,700kg/hr; so fuel scavenge would have started about 3 hours before it hit the grass, i.e. in cruise. Would scavenge have finished, though?