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tolosan

28th Jan 2014 13:30

A320 Alternate Fuel/Time Predictions Assumptions

Hello to FMS specialist,

What are the assumptions used to compute fuel and time to Alternate from Destination ?

Yancey Slide

28th Jan 2014 16:29

Nevermind, you're looking for what calculations the FMC is using to get it's fuel remaining on board rather than the pre-dispatch load aren't you....

EDA	28th Jan 2014 19:22

From FCOM DSC 22-20-40-30 Other Computations:

Predictions on ALTERNATES page are based on:

No step can be inserted in an alternate flight plan
No predictions are displayed for the selected alternate on flight plan pages. However, the flight crew can read ALTN trip fuel and time on the INIT B page before engine start, and estimated time and estimated fuel on board at alternate on the FUEL PRED page after engine start.

tolosan

29th Jan 2014 14:26

Thanks EDA, I had not been through this "Other computations" in this section...

EDA	29th Jan 2014 19:28

I've been once but took some time to find it again. Airbus FCOM... :)

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