Raytheon Beech Baron E55 - Page 510

BARON
55
AND
58
SHOP
MANUAL
n.
After
the
cement
and
sealing
compound
have
the
solenoid in
the
low
pressure
tin
the
nacelle)
must
dried and
cured,
remove
the
masking
tape
and
clean
actuate
(removing
that
regulator
from the
system),
the surface
adjacent
to
the boot
with
methyl ethyl
allowing
high
pressure
air
from
the second
regulator
ketone. The
airplane
should
not
be
flown for another
into
the
system.
12
hours.
NOTE
SURFACE DEICE
Airplanes
manufactured without
surface
CTH-1472
AND
AFTER,
AND
AIRPLANES
deicers
will
not
have the
instrument
EQUIPPED
WITH
KITS FULFILLING
pressure
regulator
located forward
of
the
FLIGHT-IN-ICING
REQUIREMENTS)
pilot.
I(Figure
11-16)
PRESSURE
PUMP
REMOVAL
The
pressure-operated
surface deice
system
consists
primarily
of
lightweight pneumatic
deice
boots
bonded
a.
Gain
access
to
the
accessory
section
of
the
eng-
to
the
wing
and
empennage
leading
edge
surfaces,
ine
compartment.
and
two
engine-driven dry-air
pumps
which
supply
air
b.
Remove
pump
inlet and
outlet hoses from
the
pressure
for
boot inflation
and
evacuation.
The
sur-
pressure
pump.
face deice
system
receives its
air
from
the
instrument
air
pumps
on
each
engine.
The
air is
drawn
in
through
c´•
Remove
the four
attaching
nuts
and
washers
and
the
air
filter
mounted
on
the
engine
rear
baffle.
From
pull
the
pump
straight
aft.
this
point
on
the
air
passes
through
the
pump,
two-
PRESSURE
PUMP INSTALLATION
stage
regulator,
in-line
filter,
and
the check
valve into
the manifold
(located
on
the
left side
of
the
airplane
NOTE
under the
pilot’s
floor).
From the manifold the
instru-
ment
air
is routed
forward
to
the instrument
pressure
When
installing
a
new
pump,
replace
the
regulator
while
the
deice
air
is
routed
aft
to
the
ejec-
in-line
filter,
and
blow
out
the
line
tor,
thus
dividing
into
two
separate
systems
at
this
between the filter
and the
pump.
Make
point.
On
airplanes
equipped
with
surface
deicers the
certain
the
inlet
line
to the
pump
is
clean.
If the
inlet
line
to
the
pump
contains
for-
nacelle
regulator
is
actually
an
assembly
with
two
eign
material,
the
new
pump
will
ingest
regulators.
The first
regulator
sets
the
pressure
at
this
material,
which
may
destroy
the
new
approximately
5.5
psi.
The second
regulator,
which
pump.
Never
use
an
air
pump
which
has
does
not
function
except
during
the
boot inflation
been
dropped
or
mishandled.
cycle,
sets
the
pressure
at
approximately
18.5
psi.
(Another
regulator,
located forward
of
the
pilot,
further
a.
Install
a new
gasket
on
the
mounting pad
flange.
reduces
the
air
pressure
to
approximately
5.0
to
6.0
in.
Hg.
for
the
instruments.)
This
5.5
psi
of
air
pressure
NOTE
(from
the first
regulator)
operates
the
ejector
(part
of
Never
jam
or
force
the
pump
onto
the
the
duplex
valve
located
in
the
aft
fuselage
of
the air-
engine
mounting
pad.
plane
at
approximately
F.S.
207)
and
is
converted to
b.
Position the
pump
on
the
mounting
pad
and
install
5.0
in.
Hg,
of
vacuum
by
the
ejector.
This
vacuum
is
the
attaching
nuts
and
washers.
Torque
nuts
to
180-
used
to
positively
hold
the
boots
down when the
deice
system
is
turned
off
or
during
the deflate
portion
of
the
220
inch-pounds.
cycle.
c.
Reinstallthe
plumbing.
When
the
system
is
turned
on,
it
may
be
placed
in
d.
Start the
engine
and
check
for
leakage
at
the
either
the
AUTO
(automatic)
or
MAN
(manual)
posi-
mounting
flange,
and check for
proper
operation
and
tion.
If
placed
in the
AUTO
position,
a
timer
located
in
pressure
readings.
the
aft
fuselage (F;.S. 207)
near
the
duplex
valve
will
control
the
deicer
cycling
(1
cycle).
In
the
MAN
posi-
DUAL PRESSURE
REGULATOR
(REUEF)
VALVE
tion
the
boots
will
inflate
or
partially
inflate
as
long
as
REMOVAL
the switch
is
held
in
that
position.
The
dual
pressure
relief valves
are
accessible
through
For
the boots
to
inflate,
the
duplex
valve
must
change
the
access
doors,
located
on
the
aft
top
of both
positions,
allowing
air into the boots.
At
the
same
time
nacelles.
11-30
515