Oxygen

Question 1

Externally, how is cockpit O2 overpressure

shown?

Answer 1

Two overboard discharge indicators located on each front side of the aircraft. They are normally green. An
indicator turns yellow, if there is any overpressure in the oxygen system

Question 2

Oxygen Sub systems.

Answer 2

The fixed oxygen system is separated into two sub-systems:
One sub-system supplies oxygen to the left side of the cockpit (captain and 4th occupant)
One sub-system supplies oxygen to the right side of the cockpit (first officer and 3rd occupant).

Question 3

Half Amber Box around CAPT OXY?

Answer 3

On ground only: when the value is green with the amber half-frame, the pressure is below 1 150 PSI.

Question 4

REGUL PR LO when?

Answer 4

Appears on ground, when:

• The oxygen CREW SUPPLY pb-sw is OFF, or
• The oxygen pressure in the oxygen distribution manifold is low (if it goes below 47 PSI.)

Question 5

Oxygen masks automatically deploy at?

Answer 5

The cabin altitude is above 13 800 ft

Question 6

How long does PAX OXY last?

Answer 6

The fixed oxygen system for the cabin provides oxygen to the cabin (passengers and cabin crew), and to the crew rest compartments for a minimum of 45 min.