Airbus A320 - Oxygen System
Oxygen under positive pressure is supplied to the mask by turning the "EMERGENCY" pressure selector in the direction of the arrow. This over-pressure supply is automatically activated when:
The flight crew portable oxygen system furnishes an effective time of use of:
The smoke hood is equipped with one oxygen cylinder and one CO2 absorption system which furnish an effective time of use of 15 min.
The cabin oxygen system is supplied by:
Collins Aerospace
Each generator feeds a group of 2, 3, or 4 masks. Oxygen masks are located in containers above the passenger seats, in the lavatories, in each galley, and at each cabin crew station.
What is the main difference between the cockpit and the cabin oxygen system?
The cabin oxygen system is activated:
There are oxygen generators in each aircraft’s galley.
The flight crew oxygen mask microphone will be automatically deactivated when the mask is re-stowed in its box.
The flight crew smoke hood is equipped with one oxygen cylinder and one CO2 absorption system
Emergency Pressure Selector - On the oxygen mask, turning the knob in the direction of the arrow generates a permanent overpressure. Overpressure supply is automatically started, when cabin altitude exceeds 20 000 ft.
Overpressure supply is automatically started, when cabin altitude exceeds 30 000 ft. Overpressure supply is available only when the N 100% selector is set on the 100%. the 100 % position.
In the cabin, the rearming of the oxygen system can only be made on ground after the masks are restowed.
A reset is available for the rearming of the system after the masks are restowed. A manual release tool allows crew members to open the doors manually in case of electrical failure.
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The white "PASSENGER SYS ON" light on the overhead panel indicates that:
The oxygen flow on the cabin oxygen masks begins when:
What is the purpose of the "CREW SUPPLY" pushbutton on the overhead panel?
The cabin oxygen masks will provide pure oxygen under positive pressure for approximately:
After using the cockpit oxygen mask, the user needs to press the RESET button in order to:
A portable oxygen system, which is provided in both the cockpit and cabin, is to be used for FIRST AID purposes only.
It is to be used as PROTECTION for the crew during on board emergencies and for FIRST AID purposes.
When the "MASK MAN ON" pushbutton of the overhead panel is pressed:
If an amber half frame appears next to the oxygen pressure, the flight crew must:
Gaseous generators replace chemical generators in the lavatories.
Use of this EMERGENCY PRESSURE SELECTOR creates on overpressure which eliminates condensation or fogging of the mask, and prevents smoke, smell or ashes from entering the mask.
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If the crew mask-mounted regulator is set to Normal "N", the pilot breathes:
On ECAM DOOR/OXY page, the "REGUL LO PR" indication appears in amber if the oxygen pressure in the low pressure circuit is below:
When the oxygen pressure is normal, what are the ECAM indications when the "CREW SUPPLY" pushbutton on the overhead panel is selected OFF?
A thermal discharge of the flight crew oxygen bottle is indicated by:
This must be checked during the aircraft walkaround.
The chemical reaction used for oxygen generation creates heat. Therefore, the smell of burning, smokes and cabin temperature increase may be associated with the normal operation of the oxygen generators in the cabin.
What happens when the crew mask-mounted regulator is set to the "100%" position?