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CREW OXYGEN MASK
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 3/6
FCOM 19 AUG 10
PRESSURE REGULATOR
Applicable to: ALL
(1) Red grips
Squeezing the right-hand side grip unlocks the two-flap door, and permits the harness to
inflate.
(2) EMERGENCY pressure selector
This selector creates an overpressure, which eliminates condensation and prevents smoke,
smell, or ashes from entering the mask.
Pressing this knob generates an overpressure ‐ for a few seconds.
‐ Turning the knob, in the direction of the arrow, generates a permanent overpressure.
Note: Overpressure supply is automatically started, when cabin altitude exceeds
30 000 ft.
(3) N/100 % selector
Pushing the button up from underneath releases it, and it pops up to the N (normal) position.
Pressing it again returns it to 100 %.
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 4/6
FCOM 19 AUG 10
100 % : The mask delivers 100 % oxygen.
N : The mask delivers a mixture of air and oxygen, the content of which varies with
cabin altitude. When cabin altitude goes above 35 000 ft, the air inlet closes and the
wearer breathes 100 % oxygen.
DOOR/OXY ECAM PAGE
Applicable to:
(1) OXY high pressure indication
It is in green, when the pressure is ≥ 400 PSI.
It is in amber, when the pressure is < 400 PSI.
An amber half frame appears, when oxygen pressure is < 1 500 PSI.
In this case, the flight crew must check that the remaining quantity is not below the minimum
(Refer to LIM-35 COCKPIT FIXED OXYGEN SYSTEM).
(2) REGUL LO PR indication
It is in amber, if oxygen pressure on the low-pressure circuit is low (50 PSI).
(3) OXY indication
It is normally in green.
It becomes amber, when :
Pressure ‐ goes below 400 PSI.
‐ Low oxygen pressure is detected.
‐ The OXYGEN CREW SUPPLY pushbutton switch on the overhead panel is OFF.
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 5/6
FCOM 19 AUG 10
DOOR/OXY ECAM PAGE
Applicable to:
(1) OXY high pressure indication
It is in green, when the pressure is ≥ 800 PSI.
It pulses in green, when the pressure is < 800 PSI (the DOOR/OXY page is automatically
displayed).
It is in amber, when the pressure is < 400 PSI.
An amber half frame appears, when oxygen pressure is < 1 500 PSI.
In this case, the flight crew must check that the remaining quantity is not below the minimum
(Refer to LIM-35 COCKPIT FIXED OXYGEN SYSTEM).
(2) REGUL LO PR indication
It is in amber, if oxygen pressure on the low-pressure circuit is low (50 PSI).
(3) OXY indication
It is normally in white.
It becomes amber, when :
Pressure ‐ goes below 400 PSI.
‐ Low oxygen pressure is detected.
‐ The OXYGEN CREW SUPPLY pushbutton switch on the overhead panel is OFF.
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 6/6
FCOM 19 AUG 10
DOOR/OXY ECAM PAGE
Applicable to:
,
,
MSN,,,,
(1) OXY high pressure indication
It is in green, when the pressure is ≥ 600 PSI.
It pulses in green, when the pressure is < 600 PSI (the DOOR/OXY page is automatically
displayed).
It is in amber, when the pressure is < 300 PSI.
An amber half frame appears, when oxygen pressure is < 1 000 PSI.
In this case, the flight crew must check that the remaining quantity is not below the minimum
(Refer to LIM-35 COCKPIT FIXED OXYGEN SYSTEM).
(2) REGUL LO PR indication
It is in amber, if oxygen pressure on the low-pressure circuit is low (50 PSI).
(3) OXY indication
It is normally in white.
It becomes amber, when :
‐ Pressure goes below 300 PSI.
‐ Low oxygen pressure is detected.
‐ The OXYGEN CREW SUPPLY pushbutton on the overhead panel is OFF.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
OXYGEN
FIXED OXYGEN SYSTEM FOR COCKPIT - ELECTRICAL SUPPLY
A318/A319/A320/A321 FLEET DSC-35-20-30 P 1/2
FCOM 19 AUG 10
BUS EQUIPMENT LIST
Applicable to: ALL
L3
NORM EMER ELEC
AC DC DC
BAT
　
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