A320 FMGS calculation of fuel to alternate

[rit]

In the A320 MCDU FUEL PRED page how computers calculate the fuel to destination and alternate if.....
in abnormal configuration ------> flap or slat lock at a certain position after TO or in approach and we have to divert
Will the fuel (in this page) be different from normal situation?
Cheers,

[Phil Squares]

Simple answer....the fuel calculation is unreliable as the FMGC does not take into account abnormal configurations.

[Nubboy]

See the notes in the QRH for guidance.
From memory, roughly double the fuel flow with flaps/slats and treble if you have the gear down.

[flyer146]

Hi,

It is still an aircraft though.
You have a distance, a groudspeed, and fuel flow with your abnormal situation.
You should be able to compute easily the fuel required to your altn.

Back to basics !!

cheers,

flyer146

[Max Angle]

the fuel calculation is unreliable as the FMGC does not take into account abnormal configurations.

As this crew found out:

Hapag-Lloyd Flight 3378 - Wikipedia, the free encyclopedia