A weight discrepancy of ten to fifteen TONS???? That's no small mistake. It's not a rounding error on the weight of the soda cans loaded into the galley for th

A weight discrepancy of ten to fifteen TONS???? That's no small mistake. It's not a rounding error on the weight of the soda cans loaded into the galley for the flight. That's most of the passengers. It's most of the freight. It's heavy enough to be a spare engine in the hold. It's a goodsize fraction of the fuel needed to fly from Seattle to Honolulu. It's certainly enough to foul up the mandatory weight-and-balance computation the pilot in command is required to do. Somehow the input to this software package missed something big. It would be interesting to know exactly what was missed.