Raytheon Beech Baron E55 - Page 536

Yaeechcraft
BARON
55
AND
58
SHOP
MANUAL
NOTE
I --I´•´•I
WARbllNG
The timer does
not
reposition
itself
to
start
at
pin
C when the
system
is turned
off,
but
will
begin
its
cycling
at
the
same
Before
moving
the
propeller,
make
position
in
which
it
was
when
last
turned
certain
that
the
ignition
switch is off
off.
Cycling
will then
proceed
in the order
andthat the
engine
has
cooled
com-
of
C,
D, E,
and F
as
before.
pletely.
There is
always
some
danger
of
a
cylinder
firing
when
the
propeller
After
a
voltage
reading
of
24
volts
DC
is
obtained,
is moved.
hold
the voltmeter
probe
on
the
pin
until the
voltage
drops
to
zero
before
moving
the
probe
on
to
the
next
CONTINUIP/
TEST
(GOODRICH) (TE-938,
pin
in the
sequence
noted above. After the
correct-
TE-943 THRU
TE-1161,
TH-I
THRU
ness
of the
cycling
sequence
has been
established, TH-1231,
TC-1608
THRU
TC-2416
turn
the
deicing
system
switch OFF
at
the
beginning
of
TC-2420
THRU
TC-2449)
one
of the "on-time"
periods
and
record
the letter
of
the
pin
at
which the
voltage supply
is
present
to
facili-
After
removing
the
plug
from the
timer,
use an
ohm-
tate
performance
of the
following
test.
meter
to
check
continuity
from:
a.
Pin
C
of the
plug
to
the
outboard
terminal
of
one
I
H64T
TEST
(GOODRICH) (TE-936
TE-943
prop
boot
on
the
right
engine.
THRU
TE-1181,
TH-I THRU
TH-1230,
b.
Pin D of
the
plug
to
the inboard terminal
of
one
TC-1608
THRU
TC-2418,
TC-2420
THRU
prop
boot
on
the
right engine.
TC-2449)
c.
Pin E
of the
plug
to
the
outboard terminal of
one
prop
boot
on
the
left
engine.
Before
this
test
can
be
performed,
the
jumper
wire
d. Pin F of
the
plug
to
the inboard terminal of
one
installed
for
the
timer
test
must
be removed
so
that
the
prop
boot
on
the
left
engine.
connector
plug
can
be
replaced
in
the
timer
recep-
tacle.
Two
men are
required
to
perform
this
test,
one
e´•
Pin
G
of the
plug
to
ground.
in the
cockpit
to
monitor the
ammeter
while
the
other
f.
Ground terminal
of
one
prop
boot
on
the
right
eng-
checks
the deicer boots.
The
man
in
the
cockpit
turns
ine
to
ground.
the deicer
system
switch
ON while
the
man
outside
g~
Ground terminal
of
one
prop
boot
on
the left
eng-
feels the
deicer
boots
to
see
if
they
are
heating
prop-
ine
to
ground.
erly.
The
man
in
the
cockpit
observes the
ammeter
for
the
proper
readings (14
to
18
amperes)
throughout
the
ELECTRIC PROPELLER
DNCING
timing
sequence.
The
ammeter
needle should deflect
(GOODRICH)
(HOT
PROP)
(TE-1162
AND
every
30
seconds
in
response
to
the
switching
action
Ar-7~tR,
TH-1231
THRU
TH-1396 EXCEPT
of the timer.
Each time this
occurs,
the
man
in
the
TH-
1369,
TC-24
19
TC-2450
AND A~
I
tn/
cockpit
must
notify
the
man
inspecting
the
propeller
deicer
boot
so
that
the
latter
can
change
the
position
Airplanes
with
the
above serials
are
equipped
with
of his hands
to
check
the
proper
heating
sequence
of
single-element
deicer
boots. The deice boot
incorpo-
the
propeller
deicer
areas.
If
any
irregularities
are
rates
a
ribbon element
which
replaces
a
wire element.
detected,
a
continuity
check
should
be
performed
on
Power
to
the boot
is
cycled
in
90-second
phases
the
wiring
from the timer
to
the brush block holders
instead of
30-second
phases.
The leads
out
of the
and
the
propeller
deicer
terminal connections.
deice
boot
are
reduced from
3
to
2.
The
slip
ring
mounts
in the
same
location
but also reduces from
3
rings
to
2
rings.
The
brush block
mounts
on
the
same
CAUTION
bracket,
but
instead
of
3
brushes,
there
are
2
modular
brushes.
A
smaller
timer
is used and
requires
new
While
following
the instructions of the
mounting
holes.
The
wiring
harness
on
the
modular
"HEAT TEST~
section,
move
the
propel-
brush
assembly
has
2
wires.
Refer
to
the
BEECH-
ler
back and
forth
to
prevent
arcing
CRAFT Parts
Catalog
for
BF
Goodrich
Kit
applicable
between
the
brushes
and
slip
ring.
to
the
specific
installation.
11-56
515