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Gravity (ZFCG) and the Zero Fuel Weight
(ZFW). This entry is mandatory for the FMGC to
compute the Gross Weight (GW), which is
necessary to determine reference speeds.
i Assistance is available for this field.
BLOCK (2R)
This is the block fuel quantity (quantity of fuel
available on board when initializing the
FMGC). It is mandatory to compute the Gross
Weight (GW) and the fuel predictions.
i Assistance is available for this field.
> Entering the ZFW and the Block Fuel is
very important to let the FMGC calculate the
Gross Weight (GW). The GW is necessary to
determine many data items by the FMGC,
including the predictions. If you forget to
enter this data, predictions are not available
and some FMGC features may become
inoperative.
TOW (4R)
This field displays the Take Off Weight (TOW),
which is calculated by the FMGC when the ZFW
and Block fuel fields are filled. It is not
modifiable by the crew.
LW (5R)
This is the predicted Landing Weight. It is
calculated by the FMGC when predictions are
available and is not modifiable by the crew.
ROUTE SELECTION PAGE
This page is only accessible when the
FROM/TO field has been filled in the INIT A
page.
The route selection page displays all the
database routes that exist with the FROM/TO
airports that were defined in the INIT A page.
If several routes exist, you can see them by
pressing the ‘NEXT PAGE’ key of the MCDU.
If no route exists in the database for the
departure and arrival airports that were
defined, “NONE” is displayed on the route
selection page.
No route exists between LFRS and LFMN. The
route selection page displays “NONE”, and you
just have to press RETURN (6L) to continue.
A route exists between LFRS and LFPO. You
can use it by pressing INSERT (6R), or ignore it
by pressing RETURN (6L).
FMGC
Airbus Series Vol.1
72 For Microsoft Flight Simulator use only. Not for use in real aviation.
If a route is defined, you can press INSERT (6R)
to use it.
Note that a database route is supposed to be
used as a base for the flight plan, is not a
complete flight plan itself.
It is composed of a departure and an arrival
airport, and waypoints that define the route
using airways or direct. A database route does
not contain the departure and arrival runway,
and does not contain the departure and arrival
procedures (SID and STAR).
When a route is inserted to create a flight plan,
a flight plan discontinuity exists between the
departure airport and the first waypoint, and
another one between the last waypoint and the
arrival airport. Managing these discontinuities
will be explained in the flight plan section.
WIND PAGE
This page is accessible from the INIT A page by
pressing the 5R select key. It lets the crew
define the winds at different altitudes.
When it is displayed for the first time, it
displays the history winds. These are the
winds recorded by the FMGC during the
previous flight. This is very useful if you fly the
same route back and forth. For example, if you
fly from Paris Orly to Nice Cote d’Azur, there is
a very high probability that you have the same
winds if you fly back from Nice to Paris one
hour later.
As soon as you modify or enter wind
information, the HISTORY WIND page becomes
the WIND page.
The History Wind page shows the winds that
were recorded during the previous flight
(small characters). We can see that the
previous flight didn’t reach the FL330, which is
why the wind is not defined for the cruise
altitude.
The wind has been defined for the FL330 (big
characters). Consequently, the page became
the Wind page.
Wind Information (1L to 4L)
You can enter wind information at any altitude
by entering the wind direction and the wind
velocity (in knots), separated by a ‘/’.
INSERT (6R)
Pressing the 6R select key validates the wind
information and enters it into the FMGC, which
will take this information into account for the
future predictions.
Note the ‘*’ characters, which means the wind
insertion may have an impact on the flight
plan.
FLIGHT PLAN PAGE
The flight plan page is accessible by pressing
the F-PLAN key on the MCDU. Basically, the
flight plan page displays the flight plan stored
in the FMGC memory. It also gives access to
the lateral and vertical revision pages.
FMGC
Airbus Series Vol.1
(c) 2007 Wilco Publishing www.wilcopub.com - www.FeelThere.com 73
　
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