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Applicable to:
If the Air Cycle Machine (ACM) fails (compressor/turbine seizure), the affected pack may be operated
in heat exchanger cooling mode.
Warm pre-conditioned bleed air enters the cooling path via the pack valve and goes to the primary
heat exchanger. Then, the main part of the cooled air goes directly downstream of ACM turbine
through the bypass valve, and the rest goes through the failed ACM.
The ACM seizure reduces the pack flow.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AIR CONDITIONING / PRESSURIZATION / VENTILATION
AIR CONDITIONING - SYSTEM OPERATION UNDER FAILURE CONDITION
A318/A319/A320/A321 FLEET DSC-21-10-40 P 3/4
FCOM 19 AUG 10
As for normal pack operation :
The pack controller regulates temperature, in accordance ‐ with zone controller demand, by
modulating the bypass valve and the ram air inlet and outlet flaps.
‐ The zone controller regulates the hot air flow through the hot air valves to optimize cockpit/cabin
temperature regulation. Hot air flow is lower than in normal pack operation, because pack flow is
reduced.
AIR CYCLE MACHINE FAILURE
Applicable to:
If the Air Cycle Machine (ACM) fails (compressor/turbine seizure), the affected pack may be operated
in heat exchanger cooling mode.
Warm pre-conditioned bleed air enters the cooling path via the pack valve and goes to the primary
heat exchanger. Then, the main part of the cooled air goes directly downstream of ACM turbine
through the bypass valve, and the rest goes through the failed ACM.
The ACM seizure reduces the pack flow.
As for normal pack operation :
‐ The pack controller regulates temperature, in accordance with zone controller demand, by
modulating the bypass valve and the ram air inlet flap.
‐ The zone controller regulates the hot air flow through the hot air valves to optimize cockpit/cabin
temperature regulation. Hot air flow is lower than in normal pack operation, because pack flow is
reduced.
AIR CYCLE MACHINE FAILURE
Applicable to:
,
,
MSN,,,,
If the Air Cycle Machine (ACM) fails (compressor/turbine seizure), the affected pack may be operated
in heat exchanger cooling mode.
Warm pre-conditioned bleed air enters the cooling path via the pack valve and goes to the primary
heat exchanger. Then, the main part of the cooled air goes directly downstream of ACM turbine
through the bypass valve, and the rest goes through the failed ACM.
The ACM seizure reduces the pack flow.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AIR CONDITIONING / PRESSURIZATION / VENTILATION
AIR CONDITIONING - SYSTEM OPERATION UNDER FAILURE CONDITION
A318/A319/A320/A321 FLEET DSC-21-10-40 P 4/4
FCOM 19 AUG 10
As for normal pack operation :
The air conditioning system controller regulates temperature ‐ by modulating the bypass valve and
the ram air inlet flap.
‐ The air conditioning system controller regulates the hot air flow through the trim air valves to
optimize cockpit/cabin temperature regulation. Hot air flow is lower than in normal pack operation,
because pack flow is reduced.
HOT AIR PRESSURE REGULATING VALVE FAILURE
Applicable to: ALL
Failed open : No effect.
Failed closed : Optimized regulation is lost. Trim air valves are driven to the fully closed position.
Pack 1 controls the cockpit temperature to the selected value and pack 2
controls the cabin temperature (FWD and AFT) to the mean value of the selected
temperatures.
TRIM AIR VALVE FAILURE
Applicable to: ALL
Optimized temperature regulation of the corresponding zone is lost.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AIR CONDITIONING / PRESSURIZATION / VENTILATION
AIR CONDITIONING - CONTROLS AND INDICATORS
A318/A319/A320/A321 FLEET DSC-21-10-50 P 1/22
FCOM 19 AUG 10
CONTROLS ON OVERHEAD PANEL
Applicable to:
(1) Zone temperature selector
‐ 12 o'clock position : 24 °C (76 °F).
‐ COLD position : 18 °C (64 °F).
‐ HOT position : 30 °C (86 °F).
(2) HOT AIR pushbutton
ON : The valve regulates hot air pressure.
OFF : The valve closes, and the trim air valves close.
The FAULT circuit is reset.
FAULT : The FAULT light comes on amber, along with an associated ECAM caution, when
duct overheat is detected. The fault circuit detects an overheat when the duct
temperature reaches 88 °C (190 °F) once.
The valve and trim air valves close automatically.
The FAULT light goes off when the temperature drops below 70 °C (158 °F), and
the flight crew selects OFF.
A318/A319/A320/A321 FLIGHT CREW
　
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本文鏈接地址：A320機(jī)組操作手冊FLIGHT CREW OPERATING MANUAL 1(10)