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stalled
and wipe with Methyl
Ethyl Ketone.
alcohol.
b.
Bostic
1008,
a
two
part
cement,
is used
to join
the
stall
strip
to the
deicer
boot.
Mix
the
Bostic
INSTALLING
THE
PROPELLER
ANTI-ICER
BOOT
1008 in
the
following
manner:
30 parts
(by weight)
of
the
base
material
(in
the "A"
package)
with 1 part
Locate
the
anti-icer
boot in
the
following
manner:
(by
weight)
of
the
accelerator
(in
the
"B" package).
a.
Sight along
the
center
line of
the
blade
leading
c.
Apply a
coat to
both
the
stall
strip
and
the
area
edge and make
a
temporary
mark
on the
hub directly
to
which it will be bonded.
Allow
to
dry 10
to
15
above
this
center
line.
The mark
should
be used as a
minutes,
then
install
the
strip
as described
in
the
guide in locating
the
boot
.
illustration.
The cement
will set in about 6 hours.
b.
Place
the
boot along
the
leading
edge of
the
blade
as follows:
at
the
inboard
end of
the
boot
,
locate
the
centerline
of
the
boot
1 8
to
1/4 inch forward
of
the
propeller
blade
leading
edge centerline,
and at
the
outboard
end of
the
boot locate
the
centerline
of
the
boot
on
the
propeller
blade
leading
edge centerline.
.
The boot should
be 1/2" from
the
propeller
hub at its
inboard
end.
Preparing
the
blade
for bonding
a.
Mask around
the
area
covered
by
the
boot,
leav-
ing a 1/4 inch border
on all sides
except
for
the
outer
end where
the
border
is increased
by
the
amount
of
stretch,
b.
Remove
the
paint
or other
organic
coating
within
A
the
masked
area
with a suitable
paint
stripper.
In
many instances,
stripping
may
be accomplished
with
Left Wing Only
lacquer
thinner
and Methyl-Ethyl-Ketone
and im-
mediately
follow with a clean
dry cloth before
solvent
Prior
to
TD-706
TD-706
and after
evaporates.
Dimension
"A" is 14. 75
Dimension
"A
·
is 14. 38
at Wing Station
lll. 38 and
at Wing Station
123. 25
Preparing
the
boot for bonding
14
25
at Wing Station
and 14 03 at Wing
a.
Mask
the
perimeter
on
the
ribbed
side with 1 2"
inch
tape
to
prevent
excessive
curling
of
the
feather-
120.38
Station
132.25
ed edges
after
the cement
is applied,
b.
Sand
the
smooth
sides
thoroughly
with No, 280
Figure
3-36.
Stall Strip
Installation
paper
abrasive
and
clean
with naphtha.
The boot is
now ready
to
install
on
the
blade,
d. When dry,
coat
the
area
with A-56-B
cement
to
replace
the
conductivity
of
the
boot
Installing
the
boot on
the
propeller
blade
a.
Warm
the
cleaned
blade
to
70°F
(minimum)
with
PROPELLER
ANTI-ICING
SYSTEM
MAINTENANCE
heat lamps
or equivalent
heaters
and maintain
this
minimum
temperature
throughout
the
installation.
The
flow
of anti-icing
fluid
(isopropyl
alcohol)
to
the
This heating
operation
is unnecessary
during
warm
propellers
is controlled
by
two
orifices
contained
in
seasons.
A maximum
temperature
of
150°F
shall
not
a tee
fitting
located
aft
of
the
anti-icing
pump in
the
be exceeded.
fluid pressure
supply
line.
The size
of
the
holes
in
these
orifices
are quite
small
(.0130/.0225
inch
b.
Brush
a
thin
uniform
coat of EC776
cement
(3-M
diameter)
and
are easily
plugged.
The system
should
company)
over
the entire cleaned
blade
area.
Allow
be checked
periodically
to
insure
the
proper
fluid
one hour
to
air
dry.
flow is maintained
(2.25
to
2.75
quarts
per hour per
propeller).
c.
Brush
a
thin
coat of Bostik
1007P cement
primer
(B.B.
Chemical
Company) over the
entire
cleaned
Clogged
or restricted
orifices
may be held
to
a
blade
area
and let dry for up
to three
hours.
This
minimum
by·
time
may be shortened
to
30
minutes
by accelerated
aging under
heat lamps
or chromalox
heaters
at
a.
Regularly
cleaning
the
screen
located
in
the
150°F.
Check
the
primer
for hardness
by scratching
bottom
of
the anti-icing
pump,
with
the thumb
nail.
If
any
degree
of
tackiness
is in-
dicated,
additional
cure
is needed
before
applying
b.
Servicing the
tank
only
with clean
isopropyl
the
bonding
cement.
3-56
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