In aircraft operation, the centre tank is used up before wing tanks? Why?

In aircraft operation, the centre tank is used  up before wing tanks? Why?
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1 Answer

Answer :

In normal operation, first fuel from the centre  tank is used and then from wing inner fuel cell  and at last from the wing outer cell. The centre
tank is used first in order to obtain better  stability of the aircraft. Moreover, if in case any  fuel pump failure occurs, the fuel can flow from  wing to engine under gravity also which is not  possible from the centre tank.
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