Couple of B744 fuel related MEL quesitons
I have a couple of questions in relation to the B744 MEL fuel system:
(1) Reserve Tanks 2 & 3 Transfer Valves -
The MEL states that with all of them inop and with the Reserve Tanks themselves empty, we are allowed to fill up all the other tanks to max capacity. However, the MTOW is limited to 335.6t. What is the reason for this. Would it be because of the reduced wing bending relief with empty Reserve Tanks?
(2) Centre Wing Tank Override/Jettision Pumps -
The MEL states that one or both may be inop, and that any fuel actually carried in the CWT must be carried in lieu of payload ie. as part of ZFW. What would be the reason for this?
Any ideas much appreciated.
Rich