Supplemental oxygen requirements for pressurized aircraft
FL250-FL350
At least a 10 minute supply of supplemental oxygen must be available for each occupant for flights above FL250
Supplemental oxygen requirements for pressurized aircraft FL350-FL410
At least one pilot at the controls needs to be using supplemental oxygen unless quick donning masks are available - in that case, as long as there are two pilots at the controls, neither needs to be using supplemental oxygen
Supplemental Oxygen requirements above FL410
at least one pilot at the controls must be using supplemental oxygen
What qualifies as a quick donning mask?
A mask that can be secured on the face with one hand and start supplying oxygen within 5 seconds
what are the three components of oxygen systems?
Storage systems, delivery systems, and mask/nasal cannula
Continuous flow effective up to what altitude?
FL250
What oxygen system is necessary at FL350?
Diluter demand or pressure demand
What altitude is diluter demand effective to?
FL400
What oxygen system is necessary above FL400?
Pressure demand
PRICE check
Pressure
Regulator
Indicator
Connections
Emergency
Basic pressurization system
Compressor section to
Heat exchanger
Valves onboard release pressure
Generic valve system for pressurized aircraft
Outflow valve
Safety valve (combination of pressure relief, vacuum relief, and dump valve)
Pressure relief valve
Prevents cabin pressure from being too high
Vacuum relief valve
Prevents ambient air pressure from exceeding cabin air pressure
Dump valve
Dumps all air into atmosphere
Are baggage compartments pressurized as well?
Yes
What TUC would you expect at 40,000ft
approximately 15-20 seconds
What TUC would you expect at 20,000ft
5-12 minutes
What TUC would you expect at 30,000ft
1-2 minutes
If a rapid decompression occurs, by how much would you reduce the expected TUC?
50%
