Module 11.15 Oxygen Flashcards
What are the two types of oxygen systems on an aircraft?
- Fixed
- Portable
What are the two fixed oxygen systems?
- Flight deck
- Cabin
Where are the oxygen bottles located for the flight crew system?
In the avionics
When do the cabin masks deploy?
When the cabin altitude goes above 14,000ft
Why is aviators oxygen used?
Almost completely dry
What are the oxygen bottles made of?
Used to be made of steel but now they are made of aluminium wrapped in kevlar
What pressure are the oxygen bottles?
1850 psi
Where is the shut off valve located?
Upstream of the regulators
What type of regulator is located near the bottle?
Pressure regulator
What type of regulator is located near the cockpit masks?
Flow regulator, called a demand regulator
What are the two types of demand regulator?
- Pressure demand
- Diluter demand
When may the user change the diluter to the give out 100% oxygen?
When there is smoke in the cockpit
When may pressure demand systems be used?
Aircraft that fly regularly at altitude above 40,000 ft
How is pressure demand oxygen supplied?
Through individual pressure regulators under high pressure
How will you know if the oxygen system has been discharged thermally or via the pressure relief?
As the green safety disk will have burst
What can be found on an oxygen bottle?
- Shut off valve, slow manual open
- Direct reading gauge
- Thermal compensator connected to the fill line
- Discharge discs
What are high and low pressure oxygen lines made from?
High - CRES
Low - Aluminium
What distributes the heat when recharging oxygen bottles?
Thermal compensator. This is ONLY during charging
How are oxygen bottles tested for continued serviceability?
Hydrostatic testing
What is the breathing oxygen tape coding?
Green tape with “BREATHING OXYGEN” written on it, the border has a white background with black rectangles
Where are the passenger oxygen bottles located?
They are located in the cargo bay
What are the two types of passenger oxygen supply?
- Gaseous
- Chemical oxygen generators
Where are the chemical oxygen generators stored?
In the overhead Passenger Service Unit (PSU)
What is used to control the oxygen pressure to reduce it to a usable level?
Flow Control Units (FCU)
