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CARGO - GENERAL
A318/A319/A320/A321 FLEET DSC-21-40-10 P 3/8
FCOM 19 AUG 10
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AIR CONDITIONING / PRESSURIZATION / VENTILATION
CARGO - GENERAL
A318/A319/A320/A321 FLEET DSC-21-40-10 P 4/8
FCOM 19 AUG 10
SCHEMATIC
Applicable to: ,
, MSN,,,
4617,
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AIR CONDITIONING / PRESSURIZATION / VENTILATION
CARGO - GENERAL
A318/A319/A320/A321 FLEET DSC-21-40-10 P 5/8
FCOM 19 AUG 10
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AIR CONDITIONING / PRESSURIZATION / VENTILATION
CARGO - GENERAL
A318/A319/A320/A321 FLEET DSC-21-40-10 P 6/8
FCOM 19 AUG 10
SCHEMATIC
Applicable to:
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AIR CONDITIONING / PRESSURIZATION / VENTILATION
CARGO - GENERAL
A318/A319/A320/A321 FLEET DSC-21-40-10 P 7/8
FCOM 19 AUG 10
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AIR CONDITIONING / PRESSURIZATION / VENTILATION
CARGO - GENERAL
Intentionally left blank
A318/A319/A320/A321 FLEET DSC-21-40-10 P 8/8
FCOM 19 AUG 10
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AIR CONDITIONING / PRESSURIZATION / VENTILATION
CARGO - SYSTEM OPERATION
A318/A319/A320/A321 FLEET DSC-21-40-20 P 1/2
FCOM 19 AUG 10
FORWARD CARGO COMPARTMENT VENTILATION
Applicable to:
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MSN,,
4538,,
Air from the cabin goes via the inlet isolation valve to the forward cargo compartment, driven either
by an extraction fan or by differential pressure in flight. A skin-mounted venturi discharges the air
overboard via the outlet isolation valve. The cargo ventilation controller controls the operation of the
inlet and outlet isolation valves and the extraction fan.
The ventilation system operates in two modes :
‐ On the ground or when ▵P ≤ 1 PSI in flight, the controller opens the isolation valves, then starts
the extraction fan.
‐ In flight when ▵P > 1 PSI, the controller stops the fan, and differential pressure maintains the
ventilation.
The controller closes the isolation valves and stops the extraction fan when :
‐ the flight crew turns the FWD ISOL VALVE pushbutton switch OFF, or
‐ the forward cargo smoke detection unit detects smoke.
The outlet valve closes and the extraction fan stops when the flight crew turns the DITCHING
pushbutton switch ON.
AFT CARGO COMPARTMENT VENTILATION
Applicable to:
Air from the cabin goes via the inlet isolation valve to the aft cargo compartment, driven by an
extraction fan. Air is controlled by the outlet isolation valve and then goes outboard through the
outflow valve.
The cargo ventilation controller controls the operation of the inlet and outlet isolation valves and the
extraction fan.
When the isolation valves are fully open, the extraction fan operates continuously when the aircraft is
on the ground and during flight.
The controller closes the isolation valves and stops the extraction fan when :
‐ the flight crew turns the AFT ISOL VALVE pushbutton switch OFF, or
‐ the aft cargo smoke detection unit detects smoke.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AIR CONDITIONING / PRESSURIZATION / VENTILATION
CARGO - SYSTEM OPERATION
A318/A319/A320/A321 FLEET DSC-21-40-20 P 2/2
FCOM 19 AUG 10
AFT CARGO COMPARTMENT HEATING
Applicable to:
The ventilation system for the aft cargo compartment uses hot engine bleed air (upstream of the
packs), mixing it with the ambient cabin air that flows through the cargo compartment.
The cargo regulating valve regulates the pressure of this hot air supply, and the trim air valve, which
is modulated electrically by the controller, controls the flow.
The cargo pressure regulating valve is pneumatically operated and electrically controlled from the
HOT AIR pushbutton on the CARGO HEAT panel.
The hot air is controlled by the cargo trim air valve which is modulated electrically by the controller.
The hot air is then mixed with air from the cabin and supplied to the cargo compartment through the
ventilation inlet isolation valve.
According to the temperature selector demand, the controller regulates the amount of hot air added
by the trim air valve, until the desired temperature is reached.
If the inlet temperature exceeds 70 °C, the controller closes the trim air valve.
If the inlet temperature exceeds 88 °C, the controller interprets this as a duct overheat and closes the
　
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