Re: differing MGTOW for same model aircraft operated by

Date:         19 Aug 97 04:14:07 
From:         D.P.Rhodes@lboro.ac.uk (Darren Rhodes)
Organization: Loughborough University, UK.
References:   1 2 3 4 5
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On 18 Aug 97 02:22:15 , Antoin Daltun <adaltun@tinet.ie> wrote:

>Some possible reasons for MTOGW variations:
>
>Airport charges and air navigation charges are based on the filed MTOGW of
>aircraft, so if an airline does not need the full weight available from the
>type for its own operations, it may file reduced weights.  Sometimes, a
>manufacturer will give a price concession for an airline which takes a
>reduced weight (on the basis that if the airline needs the higher weight
>later it will pay for it), but only if it feels that it will not otherwise
>sell the aircraft.

This is quite often the reason. For example BA has some domestic
767-300ER's which do not require the payload range ability. There
certificated MTOW is 158 tonnes versus 181 tonnes for other
767-300ER's in their fleet. This will reduce costs for  landing and
navigation fees which are rated against MTOW.

Indeed, Airbus in a A3XX brochure has contested why airports charge on
MTOW and not pax for landing/nav fees as this will adversly affect the
cost for an A3XX type aircraft.