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What happens if the cockpit oxygen pressure digital readout is below 842 psi?
This indicates a NO DISPATCH condition
Do the cockpit crew and the passengers share the same emergency oxygen?
No, the cockpit crew uses a single high pressure O2 cylinder and the cabin passengers use O2 chemical generators
Once the chemical O2 generators are started, can they be shut off?
What is the minimum O2 for a cockpit crew and color displayed?
- 2 crew: 842 psi, cyan
- 3 crew: 1150 psi, green
- No Dispatch: amber
What activates when the flight deck O2 masks are removed from their storage unit?
- Flow of O2
- Mask microphone
- Flight deck speakers
What happens if the TEST/RESET button is pressed while the flight deck O2 masks are not stowed?
- Stops flow of O2
- Deactivates mask microphone
- Deactivates flight deck speakers
What type of oxygen will the quick-donning cockpit crew masks provide?
- Emergency: Pure oxygen with positive pressure
- 100%: Pure oxygen at all altitudes
- Normal: Oxygen/air mixture on demand
During preflight, how would you know if the cockpit crew O2 has been overpressurized?
The green blow-out disc would be missing on the forward right side of the fuselage
What is the duration for passenger O2?
What is the duration of the Flight Attendant cylinder?
What is the duration of the PBE?
When will the passenger O2 masks deploy automatically?
AUTO on the Passenger Oxygen knob and cabin altitude between 14,000' and 14,750'
What does the OFF position of the PASSENGER OXYGEN knob do?
Disables the automatic deployment feature
The caustion message PAX OXY NOT DEPLOYED will appear when?
Cabin altitude is above 14,200' with passenger oxygen masks not deployed
Can the O2 door dispensing units be opened manually if it fails to automatically deploy?
Yes, via a Manual Release Tool (MRT) located at each FA station
Selecting the OVRD (Override) position on the PASSENGER OXYGEN knob will do what?
Deploys the passenger oxygen masks regardless of cabin altitude
What is indicated when the MASK DEPLOYED light is on?
The passenger and flight attendant oxygen masks have been deployed
How is passenger oxygen supplied?
Individual chemical oxygen generators located in the passenger service units, lavatories, flight attendant stations, and galley areas
What does the PBE provide?
Pressurized O2 and protection from smoke, fumes, and fire up to 40,000' for at least 15 minutes
How many portable O2 cylinders are installed in the cabin?
- 2, one in the FWD section and one in the aft
- 2 masks per cylinder
What signs automatically illuminate when the oxygen masks drop?
Above what altitude must a pilot wear their oxygen mask if the other pilot leaves the cockpit?
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