Oxygen system Flashcards
1
Q
Where does the air for the OBOGS come from?
A
LHS P3 bleed air
2
Q
What are the pros of OBOGS?
A
- Negates carrying bulky LOX equipment
- Does not require replenishment
- Minimum maintenance
3
Q
What are the 5 functions of OBOGS?
A
- Provide both pilots with a source of breathable air at all altitudes
- Provide both pilots with 95% O2 conc. when selected to MAX
- Indicate that the air is flowing from the OBOGS to the pilot
- Provide both pilots with an increasing positive pressure supply to the mask
- Conduct a BIT procedure
4
Q
What stops moist air entering the zeolite matrix?
A
Water separator
5
Q
What does the zeolite matrix do?
A
The crystalline structure allows O2 through but traps molecules such as Nitrogen
6
Q
What can an OBOGS FAIL on the EICAS indicate?
A
- Low bleed air pressure upstream of the concentrator
- Low concentration of oxygen downstream of the concentrator
- Internal failure within the system
7
Q
What does an OBOGS TEMP on the EICAS indicate?
A
Ducting temperature exceeding 200 deg F
8
Q
What does white powder in the oxygen mask indicate?
A
A breakdown of the zeolite matrix
9
Q
What is atelectasis
A
Partial collapse or incomplete inflation of the lung.
Due to breathing enhanced concentrations of oxygen while receiving G along the z axis and wearing anti-G suits
10
Q
A
