With the empty weight of early A380s being almost 5t heavier than planned, Emirates has been closely monitoring the weight of its first aircraft.
We've weighed it four times, and the last time it came in 1t lighter than before," says Clark. He explains that the "reduction" was "all to do with the way the fluids such as potable water were calculated"
I guess it depends how you weigh water, obviously Airbus have a weigh around this to reduce the overweight a/c.