Oxygen System Operation; Before Flight; During Flight - Cessna 310 1975 Owner's Manual

OXYGEN SYSTEM OPER,ATION
The oxygen system is activated by pulling the oxygen
knob to the ON position, allowing oxygen to flow from the
regulator to all cabin outlets. A normally closed valve in
each oxygen outlet is opened by inserting the connector of
the mask and hose assembly. After flights using oxygen, the
pilot should ensure that the oxygen system has been inactiv-
ated by unplugging all masks and pushing the oxygen knob
completely to the
OFF
position.
NOTE
If the oxygen knob is left in an inter-
mediate position between ON and OFF, it may
allow low pressure oxygen to bleed through
the regulator into the nose compartment of
the aircraft.
Before Flight:
(1) Oxygen Knob - PULL ON.
(2) Oxygen Pressure Gauge - Check for sufficient pres-
sure for anticipated flight requirements. (See
figure 7-1.)
(3)
Check that oxygen masks and hose assemblies are
available.
During Flight:
WARNING
Permit no smoking when using oxygen. Oil,
grease, soap, lipstick, lip blam, and other
fatty materials constitute a serious fire
hazard when in contact with oxygen. Be sure
hands and clothing are oil-free before
handling oxygen equipment.
7-5