Mooney M20M - Page 194

SERVICE
AND
MAINTENANCE
MANUAL
M20M
MOON EY
AIRCRAFT CO
RPORATION
Servicing
Access Door
(1)
(Figure
35-1A
or
-1B).
No
The
following
procedures
are
recommended
to
purge
special
f7ttings
are
required
for
this
servicing,
however
the
system:
several
types
of
standard
oxygen
fittings
are
in
use
and
A.
Connect
recharge
cart
to
filler valve
(2).
Set
cart
a
compatible
fitting
for
the
Scott
Recharging
Valve
(2)
pressure
regulator
to
deliver
50
PSI
to
aircraft
system.
must
be
used.
Mooney
P/N
870025-503
oxygen
recharge
hose
assembly
is
recommended.
B.
Plug
an
oxygen
mask
into
each outlet
(8)
(9)
in
aircraft cabin.
3.
The
cylinder
contains
1850
P.S.I.
at
210
C.
(700
F.)
when
fully
charged.
Temperature
has
an
affect
on
C.
Open
cabin door and
place
control knob
(6)
in
the
correct
charging
pressure;
See
Section
12-10-04
half
open
position.
and
(Figure
12-1)
for
pressure
vs.
temperature
D. Allow
system
to
purge
for
one
hour. If
an
charging
pressure.
offensive
odor still
lingers,
continue
purging
system
for
35-00-02
MAINTENANCE
PRACTICES
an
additional
hour. If
such odors
still
remain,
replace
supply
cylinder.
After
aircraft
system
has
been
(Ref:
AC
43.13-1A,chap.
8,
pam.
363)
adequately
purged,
remove
all
masks from
outlets
(8)
1.
The
control cable
(3)
is
attached
to
an
actuating
(9), place
control knob
(6)
in
closed
position
and
arm
(4)
on
reducing
valve
(5).
This
cable
is
routed
service
the
system
as
described
in
35-00-01.
through
various
bulkheads
along
left side
panel
to
6.
Oxygen
cylinder
removal. The
oxygen
cylinder
is
control
(6)
at
pilots
position.
The
control
is
a
push-pull
located
in the
tailcone
aft of the
baggage
compartment
cable
assembly
that
is
activated
by
a
rotating
knob
bulkhead.
Access
to
the
cylinder
is
obtained thru the
assembly.
The
supply
gauge
(7),
located
adjacent
to
door
on
the
left
side
of
the
aircraft
behind left
this
control,
indicates
pressure
of
oxygen
available
in
wing.
system.
2.
The
pilot’s, cc-pilot’s
and
passenger
outlets
(8)
WARNING
(9)
should be
inspected
for
damage
and
cleanliness
Keep
fire,
cigarettes
and
sparks
away
from the
during servicing.
vicinity
of
oxygen
cylinder.
Oil and
grease
will
IGNITE
upon
contact
with
oxygen
under
3.
Inspect
all individual
oxygen
masks and
fittings
pressure.
(14)
for
damage.
4.
Oxygen
system
test
ptocedures.
Remove
A. Place
pilots
control knob
(6)
to
closed
position.
oxygen
line from
regulator
and
plug
line.
Cap
open
B.
Gain
access
to
oxygen
cylinder
through
tailcone
regulator
port
with
a
clean
plastic
cap
to
prevent
access
door.
contamination of
the
regulator.
Conduct
low
pressure
C.
Slowly
loosen
supply
line
fittings
at
cylinder
system
leak
test
using
a
70
10
PSI
oxygen
supply
valve
(5), (reference Figure
35-1A
or
-1B),
to
relieve
plugged
into
one
cabin outlet
and
a
test
gauge
plugged
any
pressure
that
may
exist in
supply
lines
(12)
8
(13).
into
another outlet.
Apply
70
10
PSI
to
the
system,
After
pressure
is
relieved,
remove
lines
at
fittings.
allow
2
minutes for the
system
to
stabilize,
remove
oxygen
supply.
The
drop
in
pressure
after
15
minutes
D.
Disconnect control
cable
(3)
from
ann
(4)
on
shall not
exceed
five
PSIG.
Remove
temporary
plug
’educing
valve
(5).
and
ensure
that the
cylinder
is
charged
to
capacity.
E.
Cap
all
open
lines
(12)
(13)
and
regulator
Conduct
high
pressure
test
using
cylinder
pressure.
openings
(5)
(10)
with
clean
metal
caps.
Using
supely
gauge,
on
pilot’s
side
wail,
note
cylinder
F.
Note relative
position
of
regulator
valves
(5)
8
pressure.
There
shall
be
no
pressure
loss
after
30
(10)
and control
arm
(4)
prior
to
removal.
minutes.
If
leakage
exists,
apply
MIL-L25567,
leak
test
solution,
to
suspected
areas.
After
test,
wipe
clean
and
G. Loosen
clamps
(11)
retaining
cylinder
while
dry.
Make
necessary
repairs
and
retest.
supporting
cylinder.
5.
Oxygen
system
purging.
Offensive
odors
may
H.
Carefully
remove
cylinder
and
regulator
from
its
be
removed
from
oxygen
system
by
purging.
The
position.
system
should
also
be
purged
any
time lines
are
left
7.
Oxygen
cylinder
installation.
open
and
subject
to
contamination.
Purging
is
accomplished
by
connecting
a
recharging
cart
into
A.
Place
new
cylinder
and
regulators
into
position
system
and
permitting
oxygen
to
flow
through
all
lines
in
clamps
(11)
and
secure.
The
new
cylinder
should
be
and
outlets until
any
offensive
odors
have been
carried
positioned
with
regulator
valves
and control
arm
in
same
position
as
removed
cylinder assembly
away.
components.
WARNING
B.
Remove
caps
from
lines
(12)
(13);
carefully
Avoid
making
sparks
and
keep
all
burning
inspect
all
connections
for
damage
or
any
foreign
cigarettes
or
fire
away
from
the
vicinity
of the
substance
before
connection
to
new
cylinder
and
airplane
when the
outlets
are
in
use.
Inspect
the
valves.
filler
connection for
cleanliness
befbre
attaching
it
to
the filler
valve.
Make
sure
that
C.
Connect
all
lines
(12)
(13)
to
proper
fitting
and
your
hands,
tools,
and
clothing
are
clean,
connect
control
cable
(3)
to
arm
(4)
on
reducer
valve
particularly
from
grease
and oil
stains,
for
these
(5).
contaminants
will
IGNITE
upon
contact
with
D.
Charge
cylinder,
if
required,
to
the
correct
oxygen.
pressure,
see
recharging
table
(Figure
35-2).
35-00-02
4-99
OLDWILLWAYNE