skyblue CBT oxygen system Flashcards
(28 cards)
what is the calculated amount of oxygen for the pax?
25% of pax for 30 mins at 25000ft
how much oxygen are the flight crew supplied with?
10 mins from 25000ft
110 mins between 10,000 feet and 13000 feet
what supplies oxygen to the flight deck and cabin?
a high pressure cylinder through a distribution system
what do the 2 portable oxygen bottles provide?
30 mins at a cabin altittude of 13000ft
what is the oxygen bottle capacity?
2180L
what is the oxygen bottles nominal pressure?
1850psi
what is the oxygen distribution system pressure?
78psi
where is pressure of the oxygen bottle displayed?
overhead panel and on the bottle
what is the minimum normal operating pressure for the oxygen bottle?
1400psi
what will happen if an overpressure occurs on either side of the bottles pressure reducer?
content of bottle is discharged via a port forward of the main cargo door.
Check for green disk on walk around
how is oxygen from the bottle supplied to the crew?
low pressure supply valve
how is oxygen to the pax oxygen system controlled?
pax supply valve downstream of the low pressure supply valve
when is the low pressure supply valve open?
when OXYGEN MAIN SUPPLY button is pressed
why does the additional crew member mask have a lengthened tube?
to allow the jumpseater to reach the cargo compartment
what automatically engages the mask microphone?
push button by left mask compartment door
what does the yellow cross on the mask container signify?
oxygen is flowing
how can boom microphone be recovered?
by closing the mask doors. the yellow blinker will disappear
how is oxygen distributed to pax oxygen system?
passenger supply valve when the PAX SUPPLY button is pressed in
why would a portable flight attendant oxygen bottle be used?
- depressurisation
- medical reason
when does the oxygen low pressure light for the main supply display?
pressure dropped below 50psi
how do we get 100% oxygen?
by pressing the 100% rocker switch
what needs to be pressed in for the oxygen mask test?
MAIN SUPPLY
what does the crew oxygen mask regulator consist of?
an unlock rocker
an emergency selector
what does the emergency selectro on the oxygen mask control?
pressure of oxygen delivered to the mask
