Copyright D.P. Browne 2011

 

 

 

 

Home.Cockpit.Aircraft Systems.Worked Example.Program Controls.Before Flight.

 

Until the engines are started the Fuel Pred page shows dashes.

 

When the Engines are started, the INIT page is redirected to this Fuel Pred page.

 

 

 

 

 

AT

GW

Shows the Destination/Alternate airport Fuel on board values.

 

FMGC calculated Gross Weight of the aircraft. This value may be modified in flight. If there is a discrepancy between this value and the Fuel Management value a “CHECK GW” prompt appears in the MCDU scratchpad  .

 

RTE REV

Shows the % of trip fuel remaining from the present position to the destination.

May be blank on some airlines.

 

FINAL

Shows the amount of fuel available for holding and the time available in a hold, at the alternate destination ( if one is entered in the flight plan)

 

EXTRA

Shows the amount of fuel available for holding and the time available in a hold, at the primary destination.

 

FOB

Shows the amount of fuel on board computed by the FMGC. This value may be modified in flight. If there is a discrepancy between this value and the Fuel Management value a “CHECK GW” prompt appears in the MCDU scratchpad  .

The flight crew may change which system is used to provide the FOB value, by selecting /FF or /FQ and pressing LSK3L

Note that in the FMGS Aid, and MCDU Aid, the INIT A page is still available until actual take off phase, to avoid the inability of entering the flight data by mistake.

 

 

 

 

FUEL PRED

 

 

This page is used to show the Fuel predications after engines have started. The information is a repeat of the INIT B page data, but is available when the engines are running. Note that the INIT page is only displayed when the FMGS is in the PRE_FLIGHT  phase.

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