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At this time, you can see vertical arrows (next
to LAT), which means you can adjust the
latitude by pressing the MCDU vertical arrow
keys. You can press the 4R select key to move
the arrows next to the longitude field, thus
letting you adjust the longitude with the MCDU
arrow keys.
When the LAT and LONG fields are defined or
modified, you can press the 3R select key to
align the IRS according to this position.
Note: When you enter the FROM/TO airports,
the position is initialized with the position of
the departure airport, which is not the exact
position of the aircraft. You don’t have to adjust
the aircraft position accurately because this
FMGC
Airbus Series Vol.1
70 For Microsoft Flight Simulator use only. Not for use in real aviation.
aircraft is equipped with a GPS that will align
the IRS accurately when take off power will be
applied.
COST INDEX (5L)
This value is very important for the
performance and prediction calculations. It
determines how you want to use the aircraft.
You can decide to fly at low speed with low fuel
consumption, or to fly fast and burn more fuel.
Enter a cost index value of 0 corresponds to
the lowest possible fuel consumption at low
speed (long range), and a higher value
corresponds to higher speed, with higher fuel
consumption. The cost index can vary from 0 to
999.
WIND (5R)
This will bring the WIND page that lets the
crew define the winds along the flight plan. It
will be described later.
CRZ FL/TEMP (6L)
The crew can define the cruise altitude in this
field, and the temperature at the cruise
altitude if you wish.
The altitude can be entered in feet, or in flight
level. If you want to enter an altitue in flight
level, you can enter it directly or enter it by
preceding it with ‘FL’.
Value entered Cruise Altitude
8000 8000 feet
FL330 FL330
(33000 feet AMSL)
350 FL350
(35000 feet AMSL)
You can also enter the cruise altitude
temperature. If you enter both cruise altitude
and temperature, you must use a ‘/’ as a
separator. If you don’t enter the temperature,
it is automatically calculated when the cruise
altitude is entered (in this case, it appears in
small characters).
Entering the cruise altitude is very important
for the performance calculations and for the
flight phase sequencing. If you forget to enter
this data, some features of the FMGC may not
work properly.
TROPO (6R)
The crew can define the altitude of the
tropopause, which is 36090 feet by default.
INIT B PAGE
This page is only accessible from the INIT A
page by pressing the NEXT PAGE key. It is not
accessible if the engines are started. Pressing
the NEXT PAGE key again brings back the INIT
A page. If you start the engines while the INIT
B page is displayed, it jumps to the FUEL PRED
page.
Note that all the weights on this page are
shown in tonnes or in 1000 LBS, depending on
the unit system that has been selected in the
configuration window (metric or imperial
system).
TAXI (1L)
This field shows the fuel quantity for taxi. The
default value (shown in small characters) is
200 kg.
TRIP/TIME (2L)
This field shows the trip fuel and the trip time
that are calculated by the FMGC when the
predictions are available. It is not modifiable
by the crew (green).
RTE RSV/% (3L)
This field displays the route reserve and the
corresponding percentage of the trip fuel. By
default, it represents 5% of the trip fuel. The
crew can modify one of the values, and the
FMGC computes the other.
ALTN/TIME (4L)
This field shows the alternate trip fuel and
time that are calculated when the predictions
FMGC
Airbus Series Vol.1
(c) 2007 Wilco Publishing www.wilcopub.com - www.FeelThere.com 71
are available. It is not modifiable by the crew.
FINAL/TIME (5L)
This field shows the fuel quantity and time to
fly to the alternate airport or to the destination
airport if no alternate is defined. The crew can
modify one of the values, and the FMGC
computes the other.
Note: The time is displayed and should be
inserted using a XXYY format, where XX are
the hours and YY are the minutes. For
example, 0120 means 1 hour 20 minutes.
EXTRA/TIME (6L)
This field shows the extra fuel quantity and the
available time for holding over the destination
or alternate airport. It is calculated by the
FMGC and is not modifiable by the crew.
ZFCG/ZFW (1R)
This field shows the Zero Fuel Center of
　
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