Copyright D.P. Browne 2011

 

 

 

 

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

INIT B

 

 

TAXI

TRIP/TIME

The taxi fuel defaults to a pre set value. The flight crew may modify this value.

 

The Trip / Time field is calculated by the FMGC once predictions are available.

RTE/RSV

The reserve fuel for the route. The flight crew may enter a value (in tons) or a % value.

 

LZFW CG/ZFW

The flight crew enter the Zero Fuel Weight CG and the Zero Fuel Weight into the boxes for the LSK 1R. Enteries are XX or  XX.X for CG and /XXX for ZFW. They may be combined as XX/XXX

 

 

ALTN TIME

This is the alternate trip time and fuel, if an alternate airport exits in the flight plan.

FINAL TIME

The flight crew may enter a Final fuel or time, from which the FMGC will calculate associated holding fuel/time, assuming a racetrack pattern at 1500 ft above the landing runway, at green dot speed

 

EXTRA TIME

This is the extra fuel and the available flight time it represents for holding over the alternate or primary destination.

 

 

Page Entries

 

Showing ZFW Cg/ZFW 24.1/155 ready for entry to LSK1R
 

 

Once the ZFW data is entered, a Block Fuel prompt appears at LSK 2R

 

 

BLOCK

This can either be manually entered, or computed by the FMGC.

The field appears after the ZFW has been entered.

 

Mandatory entries required to enable flight performance predications to start.
 

 

Page Prompts

 

FUEL PLANNING

Selecting this prompt initiates an FMGC block fuel computation. The resulting value of this computation is displayed with a Confirm prompt. If confirmed, the calculated value replaces the BLOCK fuel value.

The prompt appears after the ZFW has been entered.

TOW

This is the take off weight in small green font. It is not modifiable by the flight crew.

 

 

LW

This is the predicted landing weight in small green font. It is not modifiable by the flight crew.