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suffers decompression, depends on the number of cylinders installed, the number of masks in use,
and the flight attitude profile flown.
At a cabin pressure altitude of less than 10 000 ft , no oxygen supply is necessary.
A reset is available for rearming the system, when the cabin altitude is below 10 000 ft , and the
masks have been returned to their containers.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
OXYGEN
FIXED OXYGEN SYSTEM FOR CABIN - DESCRIPTION
A318/A319/A320/A321 FLEET DSC-35-30-10 P 3/6
FCOM 19 AUG 10
A manual release tool allows the crew to deploy the masks, if the pneumatic door latch release fails.
It is stored at the cabin attendants’ station.
Note: If the oxygen the system supply lines sustain damage from an engine burst, the supply to
cabin oxygen system could be partially lost, without any indication of the loss appearing in
the cockpit.
SCHEMATIC
Applicable to:
, ,
MSN,,,,
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
OXYGEN
FIXED OXYGEN SYSTEM FOR CABIN - DESCRIPTION
A318/A319/A320/A321 FLEET DSC-35-30-10 P 4/6
FCOM 19 AUG 10
SCHEMATIC
Applicable to:
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
OXYGEN
FIXED OXYGEN SYSTEM FOR CABIN - DESCRIPTION
A318/A319/A320/A321 FLEET DSC-35-30-10 P 5/6
FCOM 19 AUG 10
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
OXYGEN
FIXED OXYGEN SYSTEM FOR CABIN - DESCRIPTION
Intentionally left blank
A318/A319/A320/A321 FLEET DSC-35-30-10 P 6/6
FCOM 19 AUG 10
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
OXYGEN
FIXED OXYGEN SYSTEM FOR CABIN - CONTROLS AND INDICATORS
A318/A319/A320/A321 FLEET DSC-35-30-20 P 1/4
FCOM 19 AUG 10
OVERHEAD PANEL
Applicable to:
, ,
MSN,,,,
(1) PASSENGER SYS ON light
This light comes on in white, when the control for the oxygen mask doors is activated, and it
remains on until the TMR RESET pushbutton is pressed (Refer to DSC-35-30-20 OVERHEAD
MAINTENANCE PANEL) .
(2) MASK MAN ON pushbutton
The guard keeps this button in the AUTO position.
AUTO : The mask doors open automatically, when the cabin altitude exceeds 14 000 ft.
Pressed: The mask doors open.
OVERHEAD PANEL
Applicable to:
(1) PASSENGER SYS ON light
This light comes on in white, when at least one of the oxygen regulators is open, and it
remains on until the TMR RESET pushbutton is pressed (Refer to DSC-35-30-20 OVERHEAD
MAINTENANCE PANEL ), and the system is depressurized.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
OXYGEN
FIXED OXYGEN SYSTEM FOR CABIN - CONTROLS AND INDICATORS
A318/A319/A320/A321 FLEET DSC-35-30-20 P 2/4
FCOM 19 AUG 10
(2) MASK MAN ON pushbutton
The guard keeps this button in the AUTO position.
AUTO : The mask doors open automatically, when the cabin altitude exceeds 14 000 ft, or
16 000 ft if the HI ALT LANDING switch is set ON.
Pressed: The mask doors open.
(3) HI ALT LANDING pushbutton
This pushbutton-switch changes the altitude threshold for the deployment of the passenger
oxygen masks.
Off : The masks drop, if the cabin pressure exceeds 14 000 ft (+0, - 500 ft ).
ON : The masks drop, if the cabin pressure exceeds 16 000 ft (+0, - 500 ft ).
OVERHEAD MAINTENANCE PANEL
Applicable to:
, ,
MSN,,,,
(1) TMR RESET pushbutton
The maintenance crew uses this pushbutton to reset the control circuit, after the system has
operated.
ON : The PASSENGER SYS ON light goes off.
FAULT : This light comes on in white, when the door latch solenoids are energized for more
than 30 s.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
OXYGEN
FIXED OXYGEN SYSTEM FOR CABIN - CONTROLS AND INDICATORS
A318/A319/A320/A321 FLEET DSC-35-30-20 P 3/4
FCOM 19 AUG 10
OVERHEAD MAINTENANCE PANEL
Applicable to:
(1) TMR RESET pushbutton
The maintenance crew uses this pushbutton to reset the control circuit, after the system has
operated.
ON : The PASSENGER SYS ON light goes off. The oxygen regulators close.
FAULT : This amber light comes on when the door latch solenoids are energized for more
than 30 s.
OVERHEAD PANEL
Applicable to:
(1) PRESSURE quantity display
Displays the oxygen pressure (this is a mean of the cylinder pressure).
(2) CHECK light
The amber light comes on if the oxygen cylinder pressure is below 1 600 PSI.
A318/A319/A320/A321 FLIGHT CREW
　
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