OXYGEN SYSTEM

Question 1

How is oxygen flow indicated?

Answer 1

By the yellow flow indicator

Question 2

What is the significance of the OXY ON white flag and the TEST slide?

Answer 2

When the left door opens, the mask is supplied with oxygen. Mask is still supplied when the door closes. The OXY ON flag will be visible. Press the slide to TEST and RESET oxygen flow

Question 3

How is emergency oxygen tested (flow under pressure)?

Answer 3

Pressing the EMERGENCY knob

Question 4

What happens when you squeeze the red clips on the oxygen mask?

Answer 4

It unlocks the two doors and infalates the harness

Question 5

How does the overpressure selector on the mask work?

Answer 5

Overpressure is supplied automatically above 30’000 ft
Overpressure is only available when the NORM/100% selector is set to the 100% position

Question 6

What does an amber “OXY” indication mean on the DOOR/OXY page?

Answer 6

Pressure is below 400 psi

Question 7

What does a half boxed amber indication around the oxygen psi number on the DOOR/OXY page mean?

Answer 7

Pressure is below 1200 psi

Question 8

What is the oxygen pressure distributed to the masks?

Answer 8

80 psi

Question 9

What two things will cause the blow out disc to blow out for high oxygen pressure?

Answer 9

2500-2775 psi high pressure from the cylinder
175 psi of regulator pressure

Question 10

How do you test the oxygen mask and the mic?

Answer 10

Crew supply switch ON
INT pb on
Loud speaker on
INT switch to INT
Selector to 100%
Press the “PRESS TO TEST AND RESET” slider to see the blinker turns yellow and then goes black
Press “PRESS TO TEST AND RESET” + “PRESS TO TEST” and check that the blinker stays yellow for as long as the button is pressed. You should also hear oxygen flow

Question 11

What is the function of the EMERGENCY pressure selector on the oxygen mask?

Answer 11

To create overpressure and clear smoke and condensation in the mask

Question 12

What does a REGUL LO PR message mean?

Answer 12

Distrubution pressure to the mask in below 50 psi

Question 13

What is your action if oxygen pressure indication is below 1200 psi?

Answer 13

Consult FCOM to check pressure required for flight is sufficient

Question 14

At what cabin altitude does the oxygen masks drop in the cabin?

Answer 14

Approximately 14’000 ft

Question 15

If automatic deployment of the oxygen masks fails, what other methods can be used to deploy them?

Answer 15

Push the MASK MAN ON pb
Use the manual tool in the cabin to manually release them

Question 16

How many crew oxygen bottles are there?

Answer 16

One

Question 17

What is the minimum oxygen pressure for the crew?

Answer 17

1300 psi

Question 18

How long will chemical oxygen masks supply oxygen?

Answer 18

For 15 min

Question 19

What happens when you during pre-flight extinguish the CREW SUPPLY OFF light?

Answer 19

It electrically opens a valve in the avionics bay to supply low pressure crew oxygen

Question 20

What would you notice on the DOOR/OXY page when you push to extinguish the CREW SUPPLY OFF light?

Answer 20

The OXY would turn amber from the original green indication

Question 21

Above what altitude will the crew oxygen masks provide 100% oxygen regardless of the position of the NORM/100% selector?

Answer 21

Above 35’000 ft

Question 22

Will the crew oxygen mask microphone automatically deactivate when the mask is stowed back after use?

Answer 22

No, you must press the RESET slide switch?

Question 23

If the PASSENGER SYS ON light is on, does that mean that all the passenger masks have dropped?

Answer 23

Not necessarily, the cabin crew might have to use the manual release tool to get some masks to deploy

Question 24

How does the passengers activate the flow of oxygen to their masks?

Answer 24

By pulling the mask towards themselves

Question 25

What is the purpose of the portable oxygen system?

Answer 25

To provide first aid oxygen but also to allow the cabin crew to move around the cabin if needed

Question 26

What should you notice on the DOOR ECAM when you extinguish the CREW SUPPLY OFF light?

Answer 26

The OXY indication should change from amber to green