Oxygen System

Question 1

What is the minimum OXYGEN PRESSURE for dispatch?

Answer 1

700 psi

Question 2

In the NORMAL POSITION, at what cabin altitude will the masks deploy?

Answer 2

11,500 feet +/- 500 feet

Question 3

In the NORMAL POSITION, how much pressure is supplied to drop the masks?

Answer 3

70 psi

Question 4

In the NORMAL POSITION, when the masks are deployed, how many PSI of oxygen is supplied to the passenger masks?

Answer 4

19 PSI

Question 5

In the FIRST AID position, what oxygen is supplied?

Answer 5

19 PSI oxygen is supplied for first aid masks at all altitudes.

Question 6

In the FIRST AID mode, Do the masks drop automatically?

Answer 6

Masks do not drop unless cabin altitude is above 11,500 feet.

Question 7

When is the OVERRIDE position of the oxygen system used?

Answer 7

Used if automatic system fails.

Question 8

If the OVERRIDE position is selected on passenger oxygen controller, what happens?

Answer 8

Drops masks and supplies 70 PSI oxygen to the passengers.

Question 9

What happens when CLOSED is selected on the passenger oxygen controller?

Answer 9

Shuts off passenger oxygen supply. Cylinder provides crew oxygen only.

Question 10

What is the MAXIMUM oxygen cylinder pressure?

Answer 10

1,850 psi

Question 11

Describe oxygen mask setup in LAV.

Answer 11

A dual mask box is installed in the LAV.