Oxygen System Flashcards
(B) Where can O2 pressure be read?
- MFD status page (corrected for temp)
- At the O2 cylinder panel (un-corrected for temperature)
(B) Do the cockpit crew and passengers share the same emergency oxygen?
No, the cockpit crew uses an O2 cylinder and the cain passengers use O2 chemical generators
(B) Once the chemical O2 generators are started can they be shut off?
No
(B) What is the minimum O2 for a cockpit crew?
2 crew - blue for 2
3 crew - Green for 3
(B) What activates when the flight deck O2 masks are removed from their storage unit?
- Flow of O2
- Mask microphone
- Flight deck speakers
(B) 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
(B) 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 (ratio depends on cabin altitude)
(B) During preflight, how would you know if the cockpit crew O2 has been over pressurized?
The green blow-out disc would be missing on the forward right side of the fuselage
(B) What is the O2 duration for the following?
PAX O2: 12 minutes
FA cylinder: 30 minutes
PBE: 15 minutes
(B) When will the passenger O2 masks automatically deploy?
Cabin altitude of 14,000 MSL
(B) 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
(B) What does the PBE provide?
- Pressurized O2 and protection from smoke, fumes, and fire up to 40,000 feet for at least 15 minutes
- Blue indication: Good
- Pink indication: Bad
- Vacuum loss: Bad (Even with blue indication)
(B) How many portable O2 cylinders are installed in the cabin?
2 - one in the forward section and one in the aft section
2 masks per cylinder
