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 fix oxygen mask provided oxygen for anything other than depressurization?

Answer 7

No, unless there is a written FCOM or QRH procedure for it’s 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

FCOM Limitations Oxygen

Question 9

How can a flight crew determine the flight crew oxygen pressure required for
the flight?

Answer 9

FCOM – Limitations – Oxygen – Minimum Flight Crew Oxygen Pressure

Question 10

What do the minimum oxygen bottle pressure quantities guarantee?

Answer 10

• Preflight checks
• The use of oxygen, when only one flight crewmember is in the cockpit
• Unusable quantity (to ensure regulator operation with minimum pressure) ‐
Normal system leakage
• The most demanding case among the following:
Protection after loss of cabin pressure, with mask regulator on
NORMAL (diluted oxygen):
During emergency descent for all flight crewmembers and
observers for 15 minutes
During cruise at FL100 for two flight crewmembers for 105
minutes.
• Protection against smoke with 100% oxygen for all flight crewmembers and
observers during 15 minutes at 8,000 ft cabin altitude.