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fuel in one wing than in the other, you might
want to shut off the fuel pumps to the less filled
wing and pump fuel to the engines from the
other wing. On this aircraft, the maximum fuel
imbalance is around 400 kg.
If, for any reason, part of the fuel on board is
unusable, an amber mark appears below the
FOB indication on the E/WD, as shown here :
FUEL Page
The SD FUEL page shows the current fuel
configuration :
1. Left fuel pump status.
2. Center fuel pump status. On this example,
they are closed but still green. This is
because the center tank is empty. The
center pumps are off, which is a normal
situation.
3. Right fuel pump status.
4. Wing outer tank fuel quantity.
5. Wing inner tank fuel quantity.
6. Center tank fuel quantity.
7. Fuel tank temperature.
SYSTEMS
Airbus Series Vol.1
(c) 2007 Wilco Publishing www.wilcopub.com - www.FeelThere.com 53
8. Total fuel quantity on board, as displayed
on the E/WD.
9. Fuel used by each engine since it was
started.
10. APU fuel valve. It automatically opens
when the APU is running to provide fuel to
the APU.
11. Cross feed fuel valve, controlled by the
cross feed switch on the overhead panel.
Note : The fuel used (9) is reset when the flight
is reset through the ‘Reset Flight’ menu
action.
On the A321, the FUEL page has a slightly
different layout because this aircraft does not
have inner and outer wing tanks, it has a single
fuel tank in each wing :
Alerts & Warnings
Message Color Reason
FUEL L WING TK LO LVL Red Left wing fuel tank level
is too low
FUEL R WING TK LO LVL Red Right wing fuel tank level
is too low
FUEL L+R WING TK LO LVL Red Total wing fuel tank level
is too low
FUEL CTR TK PUMPS OFF Amber Center tanks pumps are off
while center tank is not empty
FUEL GRVTY FUEL FEEDING Red Wing fuel pumps are off
so the engines are fed
with gravity only
CTR TK FEEDG Green Status message to indicate
the fuel is pumped
from the center tank only
AIR
The air system is controlled through the AIR
COND overhead section.
1. Pack Flow. It lets the crew select the low,
normal or high pack flow.
2.3.4. Temperature knobs that let the crew
adjust the temperature in the cockpit,
forward cabin and aft cabin.
5. Hot air valve can be closed using this switch.
6.7.Pack switches.
8. Engine bleed switches. The engine bleed
valves are opened in a standard configuration.
Pressing these buttons close them.
9. APU bleed switch. By default, it is closed.
The crew must press this button to let the
APU provide bleed air (necessary for initial
engine start).
10. Cross bleed (useful for restarting an
engine in flight, refer to the power plant
section for more information).
The status of the air system can be monitored
on several SD pages.
COND Page
The COND page shows the temperature in
every part of the aircraft. If the hot air valve is
closed, no more hot air will be provided to heat
the aircraft cabin.
CAB PRESS Page
The cabin pressure page shows the status of
the pressurization system.
SYSTEMS
Airbus Series Vol.1
54 For Microsoft Flight Simulator use only. Not for use in real aviation.
1. LDG ELEV : This is the elevation of the
arrival airport. It is dashed when the
arrival airport is not defined.
2. DeltaP : This is the pressure difference
between inside and outside the aircraft.
3. Cabin V/S : This shows the vertical speed
felt by the cabin (the internal cabin pressure
variation).
4. Cabin Altitude : This is the altitude that
corresponds to the current cabin pressure.
5. Pack valves, controlled by the pack switches
on the overhead panel.
6.7.8. Inlet, extract and outflow valves. They
are automatically controlled.
9. Safety valve. It automatically opens if the delta
P is too high, to prevent any aircraft damage.
BLEED Page
It shows the status of the air bleed system.
1. Pack outlet temperature
2. Pack compressor outlet temperature
3. Pack flow pressure
4. Precooler inlet pressure
5. Precooler outlet temperature
6. Cross bleed valve. If the overhead is AUTO,
the cross bleed valve status is the same as
the APU bleed valve. Otherwise, it is open
or shut according to the XBLEED knob
position.
7. APU bleed valve.
8. Engine high-pressure valves
9. Wing anti-ice air bleed (visible only if wing
anti-ice is turned on).
10. Engine bleed valves, controlled by the ENG
　
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