Cessna 182 1978 - Surface Patch; Windshield and Window Installation Techniques; Cleaning and Waxing; Fixed

MODEL
182
& T182
SERIES
SERVICE
MANUAL
c. Reverse
preceding
steps for
installation.
the
drill shall
have an
included
tip angle
of
d. When
installing
new
window,
check
fit and
exer-
60 degrees
to 140
degrees
and a
lip clearance
cise
care
not to
crack
panel.
angle
of 15
degrees
to
20 degrees.
e. File
or grind
away
excess
plastic.
f. Apply
felt
strips
and
apply
an adequate
coating
Deep
holes
-
when hole
depth
to hole
diameter
of sealing
compound,
to prevent
leaks.
ratio
is
greater
than
3.0 to
1, the
drill
shall
have
an
included
tip
angle of
140
degrees
and
3-17.
FIXED.
(See
figure
3-2.)
a lip clearance
of 12
degrees
to 15 degrees.
3-18.
DESCRIPTION.
Fixed
windows
are mounted
Parts
which
must have
holes drilled
shall
be backed
in sealing
strips and
sealing compound,
and
are held
up with
a drill fixture.
Holes
may be drilled
through
in
place by various
retainer
strips.
the part from
one side.
However,
less chipping
around
holes will
occur
if holes
are
drilled
by drill-
3-19.
REMOVAL
AND INSTALLATION.
ing the
holes
from
both
sides.
This
is accomplished
a. Remove
upholstery
and
trim
panels
as necessary.
by
using
a drill
with
an acrylic
backup
piece
on
the
b.
Drill
out
rivets
securing
retainers;
remove
opposite
side.
Remove
the drill
from
the
hole
and
window.
switch
the
backup
plate
and
finish
drilling
from
the
c.
Reverse
preceding
steps
for
installation.
opposite
side.
d.
When
installing
new
window,
check
fit
and exer-
cise
care
not to
crack
panel.
3-22.
REPAIR.
Replace
extensively
damaged
trans-
e.
File
or grind
away
excess
plastic.
parent
plastic,
rather
than
repair
whenever
possible,
f.
Apply
felt
strips
and
apply
an
adequate
coating
since
even
a carefully
patched
part
is
not
the equal
of sealing
compound,
to
prevent
leaks.
of
a new
section,
either
optically
or
structurally.
At
the
first sign
of crack development,
drill a small
hole
3-20.
CLEANING
AND
WAXING.
(Refer
to Section
2.)
at
the extreme
end
of the
crack,
as shown
in figure
3-1. This
serves
to localize
the cracks
and also to
3-21.
WINDSHIELD
AND
WINDOW
INSTALLATION
preventfurther
splitting
by distributing
the strain
TECHNIQUES:
over a
large
area.
If the
cracks
are
small,
stopping
them with
drilled
holes
will
usually
suffice
until re-
Special
drills
must
be
used
when
drilling
holes
in
placement
or
more
permanent
repairs
can
be made.
acrylic.
Standard
drills
will
cause
the
hole
to be
The
following
repairs
are
permissible;
however,
they
oversized,
distorted,
or excessively
chipped.
are not
to
be located
in the
pilot's
line
of
vision
dur-
ing
landing
or
normal
flight.
Whenever
possible,
a coolant
such
as
a plastic
drill-
a.
SURFACE
PATCH.
If a surface
patch is
to be
ing
wax
should
be
used
to
lubricate
the
drill
bit.
Installed,
trim
away
the damaged
area
and
round
all
Cessna
recommends
"Reliance"
drill
wax
or Johnson
corners.
Cut
a
piece
of plastic
of
sufficient
size
to
No.
140
Stick
Wax.
cover
the
damaged
area,
and
extend
at least
3/4-inch
on
each side
of the
crack
or hole.
Bevel
the
edges,
Drilled
holes
should
be
smooth
with
a
finish
of
as shown
in figure
3-1.
If
the
section
to
be repaired
125
rhr.
is
curved,
shape
the patch
to
the same
contour
by
heating
it in an
oil bath at
a temperature
of 248°F
to
The feed
and
speed
of the
drill
is critical.
The
fol-
302°F.,
or
it may
be
heated
on a
hot plate
until
soft.
lowing
chart
indicates
drill
speed
for
various
thick-
Boiling
water
should
not
be
used for
heating.
Coat
nesses
of acrylic.
the
patch
evenly
with
plastic
solvent
adhesive
and
place
immediately
over
the hole.
Maintain
a
uniform
Material
Thickness
Drill Speed
pressure
of from
5 to
10 psi
on the patch
for
a mini-
1/16"
to 3/16"
1500
to 4500
rpm
mum
of
three hours.
Allow
the
patch
to dry 24
to 36
1/4"
to
3/8"
1500
to 2000
rpm
hours
before
sanding
or
polishing
is attempted.
7/16"
1000
to
1500
rpm
b.
PLUG
PATCH.
In using
inserted
patches
to
1/2"
500
to
1000
rpm
repair
holes
in
plastic
structures,
trim
the
holes
to
3/4"
500 to
800
rpm
a perfect
circle
or oval,
and
bevel
the
edges
slightly.
1"
500
rpm
Make
the
patch
slightly
thicker
than
the material
being
repaired,
and similarly,
bevel
the edges.
Install
Specifications
for
the twist
drill
used
to drill
acrylic
patches
in
accordance
with
procedures
illustrated
in
is
as
follows:
figure
3-1.
Heat
the plug
until
soft
and
press
into
the
hole
without
cement,
and
allow
to cool
in order
to
NOTES
make
a
perfect
fit.
Remove
the
plug,
coat
the
edges
with adhesive,
and then
reinsert
into
the hole.
Main-
Shallow
holes
- when
hole
depth
to hole
diam-
tain
a firm,
light
pressure
until
the
cement
has
set,
eter ratio
is
less than
1.
5 to 1,
the drill
shall
then sand
or
file the
edges
level
with
the surface;
have
an included
tip
angle
of 55
degrees
to
60
buff
and
polish
to
a clear
finish.
degrees
and
a lip
clearance
angle
of
15
degrees
to 20
degrees.
3-23.
SCRATCHES.
Scratches
on
clear
plastic
surfaces
can
be removed
by
hand-sanding
operations,
Medium
deep
holes
-
when
hole
depth
to
hole
followed
by
buffing
and
polishing,
if
the
following
diameter
ratio
is
from
1. 5
to 1
up
to
3 to
1,
steps
are
followed
carefully.
3-4
Revision
1