Date: 16 Aug 99 19:02:56 From: Andrew Muir <email@example.com> Organization: The Boeing Company References: 1 2 3 4 5
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Karl Swartz wrote: > >Perhaps someone can correct me if I'm wrong, but I understand that > >bringing earlier builds up to the best currently-available standard > >would certainly involve more than just a paper upgrade. > > So far as I know, it really is just a paper upgrade as far as the > airframe is concerned. You might need to upgrade engine thrust, but > the AW&ST Source Book has identical physical dimensions and weights > for the range of 777 engines from any given engine manufacturer so > I'd guess that even that is little more than a paper upgrade -- you'd > need to change the programming of the FADECs or something similar. If there was a structural upgrade, it would be reflected in the empty weight. If the empty weight doesn't increase, odds are that there is only a paper upgrade to achieve higher gross weight.