Oxygen

Question 1

Where can O2 pressure be read?

Answer 1

• MFD Status page (corrected for temp)

- At the O2 cylinder (not temp corrected)

Question 2

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

Answer 2

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

Question 3

Once the chemical generators are started can the be shut off?

Answer 3

No

Question 4

What is the min O2 for cockpit crew?

Answer 4

• Blue for 2

- Green for 3

Question 5

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

Answer 5

• Flow of O2
• Mask microphone
• Flight deck speakers

Question 6

What type of oxygen will the quick donning masks provide?

Answer 6

• EMER: pure O2 positive pressure
• 100%: Pure O2
• Normal: Oxygen/air mixture, ratio depends on cabin altitude

Question 7

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

Answer 7

Green blowout disk would be missing on forward right side of the fuselage

Question 8

What is the O2 duration for passenger O2?

Answer 8

12 min

Question 9

What is the O2 duration for the flight attendant cylinder?

Answer 9

30 min

Question 10

What is the O2 duration for the PBE?

Answer 10

15 mins

Question 11

When will the passenger O2 masks automatically deploy?

Answer 11

Cabin altitude of 14,000 ft

Question 12

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

Answer 12

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

Question 13

What does the PBE provide?

Answer 13

Pressurized O2 and protection from smoke, fumes and fire up to 40,000 ft for at least 15 mins

• blue indication: good
• pink indication: bad
• vacuum loss: bad (even with a blue indication)

Question 14

How many portable O2 cylinders are installed in the cabin?

Answer 14

2, one FWD and one AFT

2 masks per cylinder