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channel 2
AC2-3
AC2-3
DC2
DC2
ZONE
CONTROLLER
channel 1
channel 2
DC1
DC2
PACK VALVES
CLOSURE X
AIR COND
RAM AIR
INLET X
BUS EQUIPMENT LIST
Applicable to: ,
NORM EMER ELEC
AC DC DC
BAT
AC
ESS
DC
ESS HOT
1 channel 1
channel 2
AC1
AC1
DC1
PACK DC1
CONTROLLER 2 channel 1
channel 2
AC2
AC2
DC2
DC2
ZONE
CONTROLLER
channel 1
channel 2
DC1
DC2
PACK VALVES
CLOSURE X
AIR COND
RAM AIR INLET X
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AIR COND / PRESS / VENT
AIR CONDITIONING - ELECTRICAL SUPPLY
Intentionally left blank
A330/A340 FLEET DSC-21-10-70 P 2/2
FCOM 19 AUG 10
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AIR COND / PRESS / VENT
PRESSURIZATION - GENERAL
A330/A340 FLEET DSC-21-20-10 P 1/4
FCOM 19 AUG 10
GENERAL
Applicable to:
In normal operation, pressurization control is fully automatic.
The system consists of :
Two Cabin Pressure Controllers (CPC)‐
Two outflow‐ valves, with actuators that incorporate three motors (two for automatic operation, one
for manual operation)
One control panel‐
Two safety valves‐
One negative relief valve‐
Any one of the three independent electric motors can power the outflow valves.
Normally, one of the two cabin pressure controllers operates the outflow valves by means of its
associated automatic motor. In case of ditching, an override switch on the control panel allows the
flight crew to close the outflow valves, and all valves below the flotation line. The flight crew can set
the system to operate automatically, semi-automatically, or manually.
In normal operation, cabin pressurization is fully automatic.
GENERAL
Applicable to: ,
In normal operation, pressurization control is fully automatic.
The system consists of :
Two Cabin Pressure Controllers (CPC)‐
One Residual Pressure Control Unit (RPCU)‐
Two outflow valves, with actuators that incorporate three motors (two for automatic operation, one‐
for manual operation)
One contro‐l panel
Three safety valves‐
One negative relief valve‐
Any one of the three independent electric motors can power the outflow valves.
Normally, one of the two cabin pressure controllers operates the outflow valves by means of its
associated automatic motor. In case of ditching, an override switch on the control panel allows the
flight crew to close the outflow valves, and all valves below the flotation line.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AIR COND / PRESS / VENT
PRESSURIZATION - GENERAL
A330/A340 FLEET DSC-21-20-10 P 2/4
FCOM 19 AUG 10
AUTOMATIC OPERATION
Applicable to:
The flight crew monitors system operation, but does nothing to control it. Air pressure in the cabin
follows external schedules that the system receives as signals from the Flight Management and
Guidance System (FMGS).
When FMGS data is not available for automatic pressurization, the crew only needs to select the
landing field elevation.
The pressurization system then uses the manually-selected landing field elevation for internal
schedules.
AUTOMATIC OPERATION
Applicable to: ,
The system can be fully or semi-automatic.
In fully-automatic operation :
Cabin pressurization is achieved from internal or external schedules, when appropriate FMGS inputs
are available.
In automatic operation, a ▵P limiting function monitors differential pressure.
In semi-automatic operation, when FMGS data are not available, the crew needs to select the
landing field elevation. The pressurization system then uses the manually-selected landing field
elevation for internal schedules.
MANUAL OPERATION
Applicable to: ALL
In manual mode, the flight crew controls the cabin altitude via the manual motor of the outflow valves,
by operating controls on the pressurization control panel.
Manual operation has priority over all other modes.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AIR COND / PRESS / VENT
PRESSURIZATION - GENERAL
A330/A340 FLEET DSC-21-20-10 P 3/4
FCOM 19 AUG 10
SCHEMATICS
Applicable to:
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AIR COND / PRESS / VENT
PRESSURIZATION - GENERAL
A330/A340 FLEET DSC-21-20-10 P 4/4
FCOM 19 AUG 10
SCHEMATICS
Applicable to: ,
A330/A340 FLIGHT CREW
　
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