Raytheon Beech Baron E55 - Page 506

aeechcraft
BARON 55 AND
58
SHOP MANUAL
PNEUMATIC
PRESSURE
SYSTEM
be
accomplished
by
inserting
a
screwdriver
through
SURFACE DEICE
(TE-452
THROUGH
the hole in the
top
of
the
relay
and
turning
the
adjust-
TE-1201,
TC-2003
AND
AFTER,
TH-I
ing
screw
until
a
5 to
8
second inflation
time is
estab-
THROUGH TH-1471 EXCEPT AIRPLANES
lished.
Inflation
time
is reduced
by turning
the
adjust-
ing
screw
in
a
clockwise direction
and
increased
by
EQU/PPED
WITH
KITS
FULF/LLING
turning
the
adjusting
screw
in
a
counterclockwise
FLIGHT
IN
ICING
REQUIREMENTS)
direction.
The
pressure-operated
surface
deicer
system
consists
RESURFACING DEICER
BOOTS
of
lightweight pneumatic
deicer
boots
cement
bonded
Static
electric
charges,
ii allowed
to
accumulate,
to
the
wing
and
empennage
leading edge
surfaces,
would
eventually discharge
through
the boot
to
the
two
engine-driven
dry
air
pumps
which
provide
pres-
metal skin
underneath,
causing
static
interference with
sure
for boot
inflation and
evacuation,
a
pair
of air
fil-
radio
equipment
and
possibly
puncturing
the rubber.
ters to
remove
contaminates
from the
air,
and
a
dis-
Such
static
charges
are
also
a
temporary
fire hazard
tributer
valve located
in
the aft section
which
shuttles
after
each
flight.
To
dissipate
static electric
charges,
a
the air flow
to
and from
the
deicer boots.
In
operation
thin
coating
of
conductive
cement
is
applied
over
the
the
engine-driven
pumps
supply
filtered
air
through
neoprene
of the boot.
the
pressure
relief valves
and
the
air filters
to
the
manifold located
in
the
center
section beneath
the
From time
to
time it
may
become
necessary
to restore
pilot’s
and
copilot’s
floorboards.
Air
from the
manifoid
the
conductivity
to
efficiently
dissipate
such
charges.
is
directed forward
to
the instruments
or
aft
to
the dis-
The
principle
factors involved
when
resurfacing
seems
tnbutor
valve.
The
air
then
passes
through
the dis-
advisable
are:
If the
surfacing
material
has
abraded
tributer valve
to
the
deice boots
for
inflation. When
the
Off;
if
the
surfacing
has
developed
cracks;
if
conductiv-
distributor valve is actuated
to
inflate
the
boots,
a
time
ity
is
low.
delay relay
is
actuated
at
the
same
time. After
5
to
8
The
following procedure
should be
followed
when
seconds,
the
relay
returns
the distributor valve
to
the
resurfacing
deicer boots:
original
or
evacuate
position.
In the
evacuate
position,
a.
Clean
the deicer boot
thoroughly
with
a
mild
soap
I
the air flow
is
routed
through
an
integrated
venturi
to
,,d
water
solution.
create
a
vacuum
in
the deicer
supply
lines
to
hold the
b.
Roughen
the
entire surface
of
the boot
with fine
boots
in
the down
position.
sandpaper.
The deicer
control
switch
on
the
panel
has
two
posi-
c.
Clean
the entire surface
again
with
a
clean,
lint-
tions
placarded
AUTOMATIC
and MANUAL.
Either
free
cloth
moistened
with
a
mild
soap
and
water
solu-
position
may
be
selected.
In
the
automatic
mode,
the
tion.
Rinse
with clean
water to
remove
all
traces
of
the
I
boots
will
have
only
one
inflation
cycle
of
5
to
8
sec-
scap.
ends.
The
manual
cycle
will
inflate
the
boots
as
long
d.
Apply
masking tape
beyond
the
upper
and lower
as
the
switch
is
held
in
this
position.
When
the
switch
trailing
edges,
leaving
a
1/4-inch
gap
of
bare metal.
is
released
the boots
will
return to
the deflated
posi-
tion.
The
system
pressure
may
be monitored
by
a
e.
Brush
one
coat
of
A56B
cement
on
the
boot and
deice
pressure
gage
mounted
on
the
instrument
allow it
to
dry
at
least
one
hour,
then
apply
a
second
panel.
Regulator
adjustments
for the
two-stage
regu-
coat
and
allow
it
to
dry
at
least
four
hours
before
oper-
lator
and the
distributor
and
the
sequence
in
which
ating
the
deicers.
The
airplane
may
be
flown
as soon
they
should
be
regulated
may
be
found
under
the
aS
the
cement
is
dry.
appropriate pneumatic
pressure
system
heading
NOTE
found
in this section.
If
A56B
cement
has
aged
3
months
or
TIMER RELAY
ADJUSTMENT
more,
it
may
be
necessary
to
dilute
it
with
toluol
to
obtain the
proper
brushing
The timer
relay
that controls the
inflation time of
the
consistency.
Mix
thoroughly
approxi-
deicer
boots
is located under the
floorboards
of
the
mately
5
parts
cement
to
one
part
toluol.
passenger
compartment
just
forward of the main
spar
on
the left-hand
side.
If
the
deicer boots
do
not
inflate
SURFACE
DEICER
BOOT REPAIRS
5
to
8
seconds when
the
switch
is
in
the
AUTOMATIC Minor scuffed
areas on
the boots
normally require only
position,
the
timer
relay
may
need
adjusting.
This
can
restoring
the conductive surface
in
the immediate
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515