M16 (C) TANDEM TRAINER
MAINTENANCE MANUAL
.
ISSUE
PAGE
A_November 2012
79
3.15
REPLACEMENT
OF
ENGINE
MOUNT
VIBRATION
DAMPERS
(See
fig.
3.15/1)
Engine
mount
vibration
dampers
pn
243
are
made
of
silicon
‐
rubber,
with
a
specific
mixture
which
allows
to
reduce
the
vibrations
of
the
fixing
between
the
engine
and
the
structure.
Aging
and
wear
of
the
vibration
dampers
modifies
the
silicon
mixture,
resulting
in
a
variation
of
the
angle
between
thrust
axis
and
longitudinal
axis
of
the
gyroplane.
This
deformation
and
its
effect
reduce
the
damping
capabilities
and
the
distance
between
the
edges
of
the
propeller
blades
and
the
keel
tube.
Vibration
dampers
need
periodical
replacement
to
avoid
the
risk
of
interference
between
the
propeller
blade
and
the
keel
tube
in
case
of
heavy
landing.
3.15.1
REPLACEMENT
PROCEDURE
(See
fig.
3.15/1)
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;
WARNING:
Replace
the
vibration
dampers
on
the
right
side
first
and
only
then
the
dampers
on
the
left
side.
2.
Unscrew
the
2
bolts
M10x100
on
the
right
side
of
the
engine
mount;
3.
Remove
both
right
side
bolts;
4.
Using
a
slotted
screwdriver
to
lever,
remove
the
front
vibration
damper
units
(spacer
pn
242,
vibration
damper
pn
243);
5.
Apply
a
constant
force
(FC)
on
the
propeller
flange
along
the
transversal
axis,
so
as
to
be
able
to
free
the
rear
vibration
dampers
from
their
housing
on
the
engine
mount
(see
picture);
6.
Fit
new
vibration
dampers
pn
243
in
the
engine
mount
housings;
spray
some
releasing
agent
(WD40)
to
make
this
operation
easier;
7.
Insert
the
original
spacer
pn
242
in
the
vibration
dampers
pn
243;
spray
some
releasing
agent
(WD40)
to
make
this
operation
easier;
8.
Remove
the
lateral
load
applied
previously
to
the
propeller
flange,
so
as
to
place
the
engine
back
to
its
correct
position
and
be
able
to
insert
the
engine
fixation
bolts
M10x100;
9.
Replace
the
fibrelock
nuts
M10
and
tighten
them;
10.
Repeat
steps
2
to
9
for
the
vibration
dampers
on
the
left
side.
Содержание M16C
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