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crewmembers’ seats (one at each seat).
GENERAL
Applicable to:
,
,
MSN,,,,
The cockpit’s fixed oxygen system consists of :
‐ A high-pressure cylinder, in the left-hand lower fuselage.
‐ A pressure regulator, connected directly to the cylinder that delivers oxygen, at a pressure suitable
for users.
‐ Two overpressure safety systems to vent oxygen overboard, through a safety port, if the pressure
gets too high.
A supply solenoid valve that allows the crew to ‐ shut off the distribution system.
‐ Four full-face quick-donning masks, stowed in readily-accessible boxes adjacent to the
crewmembers’ seats (one at each seat).
OPERATION
Applicable to: ALL
The crewmember squeezes the red grips to pull the mask out of its box, and this action causes the
mask harness to inflate.
A mask-mounted regulator supplies a mixture of air and oxygen or pure oxygen, or performs
emergency pressure control. With the regulator set to NORMAL, the user breathes a mixture of cabin
air and oxygen up to the cabin altitude at which the regulator supplies 100 % oxygen. The user can
select 100 %, in which case the regulator supplies pure oxygen at all cabin altitudes.
If the situation calls for it, the user can use the emergency overpressure rotating knob and receive
pure oxygen at positive pressure.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
OXYGEN
FIXED OXYGEN SYSTEM FOR COCKPIT - DESCRIPTION
A318/A319/A320/A321 FLEET DSC-35-20-10 P 2/8
FCOM 19 AUG 10
The storage box contains a microphone lead, with a quick-disconnect, for connection to the
appropriate mask microphone cable.
Note: Each mask may have a removable film that protects the visor against scratches.
This strip is optional and may be removed from the mask at any time.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
OXYGEN
FIXED OXYGEN SYSTEM FOR COCKPIT - DESCRIPTION
A318/A319/A320/A321 FLEET DSC-35-20-10 P 3/8
FCOM 19 AUG 10
SCHEMATIC
Applicable to:
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
OXYGEN
FIXED OXYGEN SYSTEM FOR COCKPIT - DESCRIPTION
A318/A319/A320/A321 FLEET DSC-35-20-10 P 4/8
FCOM 19 AUG 10
SCHEMATIC
Applicable to:
,
,
MSN,,,,
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
OXYGEN
FIXED OXYGEN SYSTEM FOR COCKPIT - DESCRIPTION
A318/A319/A320/A321 FLEET DSC-35-20-10 P 5/8
FCOM 19 AUG 10
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
OXYGEN
FIXED OXYGEN SYSTEM FOR COCKPIT - DESCRIPTION
A318/A319/A320/A321 FLEET DSC-35-20-10 P 6/8
FCOM 19 AUG 10
MASK SETTING
Applicable to: ALL
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
OXYGEN
FIXED OXYGEN SYSTEM FOR COCKPIT - DESCRIPTION
A318/A319/A320/A321 FLEET DSC-35-20-10 P 7/8
FCOM 19 AUG 10
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
OXYGEN
FIXED OXYGEN SYSTEM FOR COCKPIT - DESCRIPTION
A318/A319/A320/A321 FLEET DSC-35-20-10 P 8/8
FCOM 19 AUG 10
MASK STOWAGE
Applicable to: ALL
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
OXYGEN
FIXED OXYGEN SYSTEM FOR COCKPIT - CONTROLS AND INDICATORS
A318/A319/A320/A321 FLEET DSC-35-20-20 P 1/6
FCOM 19 AUG 10
OVERHEAD PANEL
Applicable to: ALL
(1) CREW SUPPLY pushbutton
This pushbutton controls the solenoid valve.
On : The valve is open, and supplies low pressure oxygen to the masks (normal position in
flight).
OFF: The valve is closed, and the white light comes on.
STOWAGE BOX
Applicable to: ALL
(1) Blinker flowmeter (yellow)
This indicator flashes when oxygen is flowing.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
OXYGEN
FIXED OXYGEN SYSTEM FOR COCKPIT - CONTROLS AND INDICATORS
A318/A319/A320/A321 FLEET DSC-35-20-20 P 2/6
FCOM 19 AUG 10
(2) RESET / TEST control slide
The crewmember presses the slide, and pushes it in the direction of the arrow to test : the
operation of the blinker ; the regulator supply ; system sealing downstream of the valve ; and
the regulator sealing and system operation. Pressing the RESET control slide, after the oxygen
mask has been used, cuts off the oxygen, and the mask microphone.
(3) OXY ON flag
As soon as the left flap door opens, the mask is supplied with oxygen and, once it closes (mask
still supplied with oxygen), the “OXY ON” flag appears.
　
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