OXYGEN Panel (Rev. 3)

Question 1

What happens when a pilot pushes the CREW SUPPLY pb?

Answer 1

Valve opens to supply low pressure O2 to the masks

Question 2

How does the pax fixed O2 system work and how long does it last?

Answer 2

Chemical O2 generators last for about 15 min

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 O2 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 approx. 14,000 ft

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 O2 cylinder thermal discharge?

Answer 6

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

Question 7

Could the pax O2 mask provide oxygen for anything other than depressurization?

Answer 7

No

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 O2 for the flight?

Answer 8

COM Book 1 Performance - Limitations - Oxygen