Oxygen Panel (Even)

Question 1

What happens when a pilot pushes the CREW SUPPLY PUSHBUTTON?

Answer 1

Valve opens to supply low pressure oxygen to the masks

Question 2

How does the passenger fixed oxygen system work and how long does it last?

Answer 2

Chemical oxygen generators last for approximately 15 minutes

Question 3

What does the illumination of the SYS ON light mean? Does this mean that all the masks have deployed?

Answer 3

The signal has been sent to release the oxygen mask doors, but some masks may have to be deployed manually.

Question 4

What causes automatic deployment of the masks?

Answer 4

Cabin altitude reaching approximately 14,000 feet

Question 5

How is the crew oxygen mask microphone deactivated when the mask is stowed?

Answer 5

The RESET control slide will accomplish this – it does not happen automatically.

Question 6

What indication would a pilot have of a crew oxygen cylinder thermal discharge?

Answer 6

The green disk on the lower left side of the forward fuselage would be missing.

Question 7

Could the passenger oxygen mask provide oxygen for anything other than depressurization?

Answer 7

No, unless there is a written COM procedure for its use.

Question 8

On the ground, if there is an amber half frame around the CKPT OXY PSI box, where would you look to see if you have enough oxygen for the flight?

Answer 8

COM Book 1 Performance – Limitations – Oxygen