Raytheon Beech Baron E55 - Page 517

BARON
55
AND
58
SHOP
MANUAL
TROUBLESHOOTING
PNEUMATIC
PRESSURE SYSTEM
LIGHTWEIGHT
AUTOMATIC SURFACE
DEICER
(PUMP-DRIVEN)
eC-2003
AND
AFTER,
TE-452 AND
AFTER,
TH-I
AND
AFTER)
The
following troubleshooting
procedures
are
based
on
the
assumption
that the
airplane
engine-driven
dry
air
pumps
are
operational.
Indication
Probable
Cause
Remarks
1.
Deicer
boots
do
not
inflate
(either
a.
Open
circuit
breaker,
a.
Push deicer
circuit
breaker
to
or
both
engines
operating
at
reset.
minimum cruise
rpm
for
a
period
of
eight
seconds).
b.
Loose electrical
connections
or
b.
Tighten
or
repair
as
required.
broken
wire.
c.
Time
delay
relay
not
functioning,
c.
Replace
the
relay.
d.
Deicer
boot
puncture,
d.
Repair
as
prescribed
in this
section
or
replace.
e.
Distributor
valves
not
e.
See
items 4
and
5.
functioning.
f.
Piping
lines
kinked,
blocked
or
f.
Inspect
lines
and
connections;
not
connected.
-blow
out lines.
g.
Leak in
system
g.
See
System
Checkout,
locate
and
repair.
2.
Deicer boots inflate
too
slowly
a.
Piping
lines
kinked,
partially
a.
Inspect
lines
and
connections;
(either
or
both
engines operating
at
blocked,
or
not
connected
securly.
blow
out
lines.
minimum
cruise
rpm
for
a
period
of
eight
seconds.
b. Leak in
system.
b.
See
system
checkout,
locate
and
repair.
c.
Deicer boot
puncture.
c.
Repair
as
prescribed
in
this
section
or
replace.
d.
Distributor
valve
not
functioning.
d.
See
items
4
and
5.
3.
Deicer boots
deflate
too
slowly.
a.
Clogged
instrument
air filter.
a.
Replace
air
filter.
b.
Piping
lines
kinked
or
partially
b.
Inspect
and
blow
out
lines.
blocked.
c.
Overboard line
from distributor
c.
Inspect
and blow
out
lines.
valve
partially
blocked.
d.
Distributor valve
not
operating
d.
Overhaul
or
replace.
properly.
e.
Electrical circuit
malfunctioning.
e.
See
system
wiring
diagram.
515
11-37