M16 (C) TANDEM TRAINER
MAINTENANCE MANUAL
.
ISSUE
PAGE
A_November 2012
55
3.9
SECONDARY
CONTROLS
3.9.1
CHOKE
CONTROL
LINE
(See
Fig.
3.9/1)
The
choke's
control
line
starts
from
the
lever
pn
128,
placed
at
the
left
side
of
the
main
structure's
longitudinal
spar
(1),
close
to
the
floor.
A
cable
1,5x2500
mm
is
fastened
to
the
control
lever
by
means
of
a
cable
retainer
pn
107
which
is
inserted
in
its
sheath
pn
131,
which
in
turn
is
fastened
to
the
left
side
of
the
main
structure
(1)
and
reaches
the
splitter
pn
132
located
close
to
the
engine
mount.
After
the
splitter
pn
132,
the
movement
is
transmitted
through
two
cables
1,2x1000
mm
fastened
to
the
throttles
of
the
two
cable
retainers
pn
133
‐
to
the
choke's
throttles
(2)
located
on
the
carburettors.
Oxidation
of
the
cables
in
the
choke
line
could
be
the
cause
of
nasty
consequences,
as
the
throttles
(2)
placed
on
the
carburettors
could
not
return
to
closing
position
when
the
pilot
lowers
the
choke.
This
results
in
excessive
fouling
of
the
spark
plugs
and,
in
the
long
term,
in
a
possible
contamination
of
the
oils.
WARNING:
Due
to
the
above
mentioned
remarks,
a
careful
check
of
the
correct
sliding
of
the
cables
inside
the
sheaths
pn
131
and
the
consequent
correct
closing
of
the
choke
throttle
valves
(2)
are
strongly
recommended.
3.9.1.1
REPLACEMENT
OF
CHOKE
CABLES
(See
Fig.
3.9/1)
1.
Before
starting
verify
that
the
engine's
ignition
key
and
push
‐
button
are
in
OFF
position
and
that
all
the
breakers
are
switched
OFF;
2.
Put
the
choke
lever
pn
128
in
OFF
position;
3.
Cut
the
cable
1,2x1.000
and
remove
the
cable
terminal
protection
pn
103
located
close
to
the
lever
of
the
carburettor
(2);
4.
Loosen
and
free
the
cable
1,5x2500
from
the
cable
retainer
pn
107
that
fastens
it
to
the
choke
lever
pn
128;
5.
Cut
the
cable
1,5x2.500
between
the
sheath
pn
131
and
the
deformation
(3)
caused
by
the
tightening
action
of
the
retainer
pn
107.
This
deformation
could
cause
some
problem
when
doing
step
9;
6.
Loosen
the
cable
retainers
pn
133
and
free
the
cables
1,2x1000
from
the
carburettors’
throttles;
7.
Cut
the
cables
1,2x1000
between
the
sheath
pn
131/A
and
the
deformation
(4)
caused
by
the
tightening
action
of
the
retainer.
This
deformation
could
cause
some
problem
when
doing
step
9;
8.
Open
the
splitter
pn
132
and
withdraw
the
lower
cap
(132/A);
9.
Extract
the
kern
(132/B)
of
the
splitter
and
the
three
cables
(one
low
and
two
upper
cables).
10.
Visually
check
the
cable.
If
there
is
no
oxidation,
the
gyroplane
has
been
used
in
optimal
conditions,
with
low
humidity,
it
has
been
cleaned
accurately,
did
not
fly
in
the
rain
and
was
not
parked
in
a
makeshift
hangar;
WARNING
DANGER:
11.
Before
starting
to
clean
the
internal
part
of
the
sheath,
direct
the
upper
end
of
the
sheath
pn
131
downward,
far
away
from
people
and
heat
sources;
12.
Starting
from
the
sheath
end
(5)
in
the
cockpit,
spray
some
releasing
agent
inside
the
sheath;
13.
Always
from
the
sheath
end
(5)
in
the
cockpit,
now
spray
some
spray
grease
in
the
sheath;
14.
Insert
the
new
cable
1,5x2.500
of
the
choke,
following
the
sequence:
splitter
lower
cap
(132/A),
sheath
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