Oxygen

Question 1

How is oxygen flow indicated?

Answer 1

Yellow blinker flow meter.

Question 2

What is the significance of the OXY ON white flags? And the TEST slides?

Answer 2

• As soon as the left flap door opens, the mask is supplied with oxygen and, once it closes (mask still supplied with oxygen).
• Presses 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.

Question 3

How is EMERGENCY OXYGEN flow tested?

Answer 3

• Pressing the EMERGENCY knob generates an overpressure for a few seconds.
• Turning the knob, in the direction of the arrow generates a permanent overpressure.

Question 4

Squeezing the red clips does what?

Answer 4

Unlocks the two flap door, and permits the harness to inflate.

Question 5

How does the over pressure selector work?

Answer 5

• Overpressure supply is automatically started when cabin altitude exceeds 30,000’
• Overpressure supply is available only when the N/100% selector is set on the 100% position.

Question 6

On the SD (doors) OXY (amber) means what?

Answer 6

When the pressure is less than 400PSI.

Question 7

What should you do if the oxygen pressure indication has a half-box (half frame) in amber? And REGUL LO PR is indicated?

Answer 7

Turn the crew supply on by pressing the p/b on the OHP.