Raytheon Beech Baron E55 - Page 532

BARON
55
AND
58
SHOP MANUAL
TROUBLESHOOTING
WINDSHIELD
HEATER
SYSTEM
Trouble
Probable Cause
Remarks
1.Windshield
heater
inoperative,
a.
Loose connections
or
broken
a.
Check
for loose connections.
wires.
Check for
continuity
between
components,
isolate
damage
and
repair.
b. Defective
WSHLD
switch. b.
Replace
switch.
c.
Windshield heater
relay
stuck
in
c.
Replace relay.
the
open
position.
d.
Defective
temperature
controller
d.
Replace
controller.
e.
Damaged
windshield heater.
e.
Replace
heater.
2.
Windshield heater
will
not
cycle
off.
a.
Defective
temperature
controller.
a.
Replace
controller.
b.
Windshield heater
relay
stuck
in b.
Replace relay
the
closed
position.
I
To
prevent
damage
to
the
brushes,
the brush
block
assembly
should
be
angled
in such
a manner
that
Timing
Timer Areas
of
Prop
the
brushes
contact
the
slip
ring
at
an
angle
of Sequence
On Deicer
Heated
approximately
2" from
perpendicular,
as
measured
Pin
30
Left
Engine
prop,
toward the direction
of the
slip
ring
rotation. Refer
to
B
sec.
outboard
halves
Figure
11-14. A dial
indicator
gage
may
be
used to
Pin
30
Left
Engine
prop,
check
the
amount
of
slip ring
runout
(wobble)
in
A
sec.
inboard halves
relation
to
the
brush
block.
If the total
runout
over
360
degrees
of rotation exceeds
.005
inch,
or
over
Pin
30
Right Engine
prop,
any
Cinch
are
exceeds
.002
inch,
the
slip
ring
should
D
sec.
outboard
halves
be
aligned
by
adding
shims between
the
slip
ring
and
Pin
30
Right Engine
prop,
its
mounting
surface.
To
avoid
error
in
the
gage
C
sec,
inboard
halves
readings during
such
a
check,
slowly
rotate
the
slip
ring
while
pushing
in
on
the
propeller
to
take
the
play
The second method of
checking
the
timer
is
to
turn
on
out
of
the thrust
bearings.
the
system
and,
following
the above
sequence,
feel
the
sections
on
the
propeller
iceguard
to
see
if
they
After the brushes
have been
installed,
the
airplane
are
heating
in
the
proper
order.
should
be
flown for
at
least
one
hour
before
the
sys-
NOTE
tem
is
energized
for
a
period
longer
than
that
required
for
the
normal installation checkout.
This
will
allow the
The timer does
not
reposition
itself when
brushes
to set
and
a
film
to
form
on
the
slip ring.
the
system
is shut
off;
therefore,
when
the timer is
turned
on,
the
cycling
will
start
where
it left off
on
the
previous
ELECTRIC
PROPELLER
DEICER TIMER
operation.
CHECK
(GOODYEAR)
ELECTRIC PROPELLER
DEICING
The
deicer
timer,
located
in
the
pilot’s
compartment
on
(GOODRICH)
(TE1938,
TE943
THRU
the left hand
side
of
the
firewall,
can
be checked
by
THRU
TC12418,
TC12420
THRU
TC-2449)
I
TE11181,
TH-1 THRU
TH-1230,
TC-1608
one
of
two
methods.
Apply
power
to
the
plug
attached
to
the timer.
Check
the
DC
voltage
to
the
ground
from
the
pins
on
the
timer.
Each
pin
should read
24
volts
in
The
electric
propeller
deicer
system
includes
an
elec-
the
following
sequence:
trically
heated
boot
for each
propeller
blade,
brush
11-52
E15