Oxygen

Question 1

Where can O2 pressure be read?

Answer 1

• MFD Status page (corrected for temp)

- At the O2 cylinder panel (un-corrected for temp)

Question 2

Do the cockpit crew and passengers share the same emergency oxygen?

Answer 2

No, the cockpit crew uses an O2 cylinder and the cabin passengers use O2 chemical generators

Question 3

Once the chemical O2 generators are started, can they be shutoff?

Answer 3

No

Question 4

What is the minimum O2 for a cockpit crew?

Answer 4

• 2 crew - “Cyan for 2”

- 3 crew - “Green for 3”

Question 5

What activates when the flight deck O2 masks are removed from their storage unit?

Answer 5

• Flow of O2
• Mask Mic
• Flight deck speakers

Question 6

What happens if the TEST/RESET button is pressed while the flight deck O2 masks are not stowed?

Answer 6

• Stops flow of O2
• Deactivates Mask Mic
• Deactivates flight deck speakers

Question 7

What type of oxygen will the quick-donning cockpit crew masks provide?

Answer 7

• Emergency - Pure oxygen with positive pressure
• 100% - Pure oxygen at all altitudes
• Normal - Oxygen/Air mixture (ratio depends on cabin ALT)

Question 8

During preflight, how would you know if the cockpit crew O2 has been over-pressurized?

Answer 8

The Green Blow-out Disc would be missing on the forward right side of the fuselage

Question 9

What is the O2 duration for the following?

Answer 9

• Passenger O2 - 12 min
• FA Cylinder - 30 min
• PBE - 15 min

Question 10

When will the passenger O2 masks automatically deploy?

Answer 10

Cabin Alt of 14,000 MSL

Question 11

Can the O2 door dispensing units be opened manually if it fails to automatically deploy?

Answer 11

Yes, via a manual release tool (MRT) located at each FA station

Question 12

What does the PBE provide?

Answer 12

• Pressurized O2 and protection from smoke, fumes, and fire up to 40,000’ for at least 15 mins
• Blue indication - Good
• Pink indication - Bad
• Vacuum loss - Bad (even with a blue indication)

Question 13

How many portable O2 cylinders are installed in the cabin?

Answer 13

2 - 1 in the FWD and 1 AFT section

2 masks per cylinder