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can change it as you wish, knowing that in real
life, each airport has its own transition
altitude.
If you enter a value here, it appears in big
characters (entered by the crew).
THR RED/ACC (5L)
This field shows the altitude for throttle
reduction and acceleration. By default, these
values are set 1500 feet above the departure
airport altitude. You can alter these values
(minimum value is 400 feet AGL), but
remember that acceleration altitude must be
equal or greater than the reduction altitude.
The reduction altitude is the altitude at which
the pilot in command should switch the
throttle levers from take off power (FLEX or
TOGA) to the climb power (CLB). When the
aircraft reaches this altitude, a flashing ‘LVR
CLB’ message appears on the FMA (column 1)
to remind the pilot to pull the throttle levers to
the CLB detent. The climb then continues in
SRS mode until the acceleration altitude is
reached.
On reaching the acceleration altitude the
FMGC
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aircraft begins to accelerate. The vertical
mode switches to CLB (climb mode). The
autopilot manages the pitch to accelerate to
initial climb target speed until the target
altitude is reached.
Note: The FCU target altitude should always
be higher than the acceleration altitude. If it is
not the case, the FCU altitude LED is off. It
means you should always check this light is
illuminated prior to take off.
The FCU target altitude (2500) is lower than
the acceleration altitude (3000), the LVL/CH
light is off. This is a wrong situation because
the aircraft will tend to descend when the
acceleration altitude is reached.
The FCU altitude (5000) is higher than the
acceleration altitude. This is perfect and safe.
When the acceleration altitude (3000) will be
reached, the aircraft will accelerate to 5000
feet.
RWY (1R)
This field displays the runway that has been
selected for take off. It is dashed if the runway
has not yet been selected. It is not modifiable
by the crew.
TO SHIFT (2R)
This field contains the Take Off Shift, in meters
or in feet depending on the unit system. It is
supposed to be used when the aircraft does
not take off from the beginning of the runway.
The FMGC takes the shift value into account to
manage the take off and initial climb.
This function is unnecesary on this aircraft
because the GPS provides a perfect IRS
alignment as soon as the take off power is
applied. Consequently, the FMGC knows
exactly the aircraft position during take off
without needing the TO shift.
FLAPS/THS (3R)
This field is only a reminder for the crew, it is
not used by the FMGC. The pilot can enter here
the flap configuration and the Trimmable
Horizontal Stabilizer (THS) position chosen for
take off.
In the real aircraft, this field is used as a
reminder for the crew, the FMGC does not use
it. If you are in Beginner or Intermediate
mode, the flap setting you enter here is
important because it determines the V1, VR,
V2 values provided for you as an assistance.
FLEX TO TEMP (4R)
This field displays the temperature used for a
FLEX take off. It's used to determine the
temperature for a reduced-thrust take off,
when the aircraft is below the Maximum Take
Off Weight (MTOW).
In order to enter this temperature, real pilots
have sheets that describe each airport runway
and that give these numbers in all possible
conditions.
ENG OUT ACC (5R)
This is the altitude at which you should
accelerate if an engine is out.
NEXT PHASE (6R)
Pressing 6R select key displays the climb
performance page.
F, S, O Speeds
In the center of the page, the F, S and Green
Dot speeds are displayed. They can be
calculated only when the Gross Weight (GW) is
defined (INIT B page). They can not be
modified by the crew.
The F speed is the speed at which the flaps can
be retracted, displayed on the PFD when the
flap configuration is 2 or more.
The S speed is the speed at which the slats can
FMGC
Airbus Series Vol.1
88 For Microsoft Flight Simulator use only. Not for use in real aviation.
be retracted, displayed when the flap
configuration is 1.
The Green Dot speed is the best drag-to-lift
speed, used for expedite climb or for holding
patterns. It is displayed when the aircraft is in
clean configuration.
PERF CLB PAGE
This page can be accessed by pressing the
　
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