Re: Boeing naming convention for 777

Date:         16 Aug 99 19:02:56 
From:         Andrew Muir <>
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.