OXYGEN LINES AND OUTLETS
Low pressure oxygen lines are routed, above the headliner, from the low
pressure port off of the regulator to the cabin area where the dispensing
systems are attached to deliver the supplemental oxygen. Oxygen outlet
ports are installed in the aircraft’s headliner. Depending on what option is
installed either 2 or 10 ports may be provided. To engage the mask into the
outlet, simply align the bayonet plug with the slots in the outlet, press the plug
completely into the outlet and rotate the plug clockwise 1/4 turn and ensure
the plug locks into place. To remove the plug from the outlet, press the plug in
and rotate it counterclockwise 1/4 turn and remove it from the outlet.
FILLER PORT
The oxygen ller port is attached directly to the bottle regulator and can be
accessed by removing the aft bulkhead panel. A pressure gauge is provided
on the bottle/regulator assembly for reference while servicing the oxygen
system.
OVERPRESSURE BURST ASSEMBLY
To prevent the high pressure side of the oxygen system from reaching a
dangerously high value, an emergency burst assembly is provided which
dumps the oxygen overboard if the pressure reaches 3000 PSI. This
assembly utilizes a single burst disk mounted in the regulator assembly. The
burst disk will bleed all oxygen into the aft fuselage and overboard if high
pressure fails the disk due to over-lling or pressure increases due to extreme
temperature changes. If the burst assembly releases the oxygen no oxygen
will be available for ight.
OXYGEN MASKS
Two masks are provided for the pilot and front passenger/copilot. These
masks are equipped with a built-in microphone and have an adjustable
owmeter built into the oxygen line to provide the appropriate ow of oxygen
for the selected altitude on the owmeter up to 25,000 feet. Several options
are available for passenger oxygen masks. All masks have attached
placarding for the proper method of donning, use, and safety precautions.
When using nasal cannula devices, breathing exclusively through the mouth,
extremely light breathing, or nasal blockage will inhibit proper ow of oxygen.
WARNING: Do not handle or use oxygen when wearing lipstick, lip
balm, petroleum jelly, or any other product containing oil or grease. These
substances become highly ammable in oxygen rich environments.
NOTE: Breathing through the nose, and limiting conversation is required
in order to achieve proper oxygenation when using nasal cannula
breathing devices.
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