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The Learjet 45 oxygen system (Figure 17-1)
consists of system storage, the crew distribu-
tion system and the passenger distribution
system. Oxygen system components include
an oxygen storage cylinder (bottle) with a
shutoff valve/regulator assembly, an over-
board discharge indicator, and an oxygen pres-
sure indicator. Oxygen is available to the crew
at all times (when the oxygen bottle shutoff
valve is open) and can be made available to the
passengers, either automatically (when cabin
pressure altitude exceeds 14,500 feet), or at any
altitude by manual activation. The oxygen
system is designed for use during an emer-
gency descent to an altitude that does not re-
quire oxygen. The system is not intended for
extended periods of use during flight at alti-
tudes requiring oxygen, or as a substitute for
the normal pressurization system. Smoking
is prohibited on the airplane whenever oxygen
is in use by the crew or the passengers.
OXYGEN STORAGE CYLINDER
The oxygen storage cylinder is located in the
forward nose avionics compartment (Figure
17-2) and the standard cylinder contains ap-
proximately 22 cubic feet (669 liters) of pres-
surized oxygen. The oxygen cylinder shutoff
valve is connected to the oxygen cylinder and
CHAPTER 17
MISCELLANEOUS SYSTEMS
17-1
FOR TRAINING PURPOSES ONLY
L E A R J E T 4 5
P I L O T T R A I N I N G M A N U A L
FlightSafety
international
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OXYGEN SYSTEM
GENERAL