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OXYGEN SYSTEM
A four
-place
oxygen
system
is
available
for
your
airplane.
In
this
system,
an
oxygen
cylinder,
located
behind
the
rear
baggage
compart-
ment wall,
supplies
the
oxygen.
Cylinder
pressure
is reduced
to
an
op-
erating
pressure
of
70
psi by
a
pressure
regulator
attached
to the
cylin-
der.
A
shutoff
valve
is included
as
part
of
the
regulator
assembly.
An
oxygen
cylinder
filler
valve
is located
on
the
left side of
the
rear
baggage
compartment
wall.
Cylinder
pressure
is indicated
by
a pressure
gage
located
in
the
overhead
oxygen
console.
Four
oxygen
outlets
are
provided;
two
in
the
overhead
oxygen
console
and
two
in
the
cabin
ceiling
just
above
the
side windows;
one
at
each
of
the
seating
positions.
One
permanent,
microphone-equipped
mask
is provided
for
the
pilot,
and
three
disposable
type
masks
are
provided
for
the
passen-
gers.
All
masks
are
the
partial-rebreathing
type
equipped
with vinyl
plastic
hoses
and
flow indicators.
A
remote
shutoff
valve
control,
located
adjacent
to the
pilot's
oxygen
outlet,
is used
to
shut
off
the
supply
of oxygen
to the
system
when not in
use.
The control
is mechanically
connected
to the
shutoff
valve
at
the
cylinder.
With
the
exception
of
the
shutoff
function,
the
system
is com-
pletely
automatic
and requires
no manual
regulation
for
change
of
altitude.
OX
YGEN SYST
EMOPER
A
TIO N.
Prior
to
flight,
check
to
be sure
that there
is
an
adequate
oxygen
supply
for
the trip,
by noting
the
oxygen
pressure
gage
reading.
Refer
to
paragraph
OXYGEN
DURATION
CALCULATION,
and
to the
Oxygen
Duration
Chart
(figure
7-2).
Also,
check
that the
face
masks
and
hoses
are
accessible
and in good condition.
Supplemental
oxygen
should
be used
by
all
occupants
when cruising
above
10, 000 feet.
As
described
in
the
Cessna
booklet
"Man
At Altitude,
"
it is often advisable
to
use oxygen
at
altitudes
lower
than
10, 000 feet
under
conditions
of night flying,
fatigue,
or periods
of physiological
or
emotional
disturbances.
Also,
the
habitual
and excessive
use of
tobacco
or
alcohol
will usually
necessitate
the
use of oxygen
at
less
than
10,
000
feet,
7-6
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