Re: Confusion over 777 variants.

Date:         25 Nov 97 03:26:06 
From:         Marc Schaeffer <>
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Karl Swartz wrote:
> Boeing usually lists "standard" and "option" figures for any given
> model.  An airline can order one of a number of variations between
> these extremes.  On the 777-200 (non-IGW), MGTOW now ranges from
> 506,000 lbs (229,520 kg) to 545,000 lbs (247,210 kg).  United wanted
> greater range, so their launch order was for 525,000 lbs MGTOW; they
> were delivered at 535,000 lbs and have since been upgraded to the
> full 545,000 lbs.

How did they upgrade those birds ?? The 777-200nonIGW has engines rated
between 74,000 and 77,000 lbs thrust. As you stated above the MGTOW also
changes. I was told that those changes can be made by simple
reprogramming of the FMS software (for the MGTOW) and the FADEC (for
the engines). Some money will of course also change the owner. Are there
*really* no other differences between the various 777-200nonIGW models?
The same logic should apply for the different 777-200IGW variants.  The
differences between 777-200nonIGW and 777-200IGW  are (in addition to
FADEC and FMS software), stronger structures and the center tank, making
it impossible to convert a nonIGW to an IGW 777. Correct ?

Marc Schaeffer, Luxembourg //
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