System - Raytheon BEECH BARON 58P Maintenance Manual

BEECHCRAFT
BARON 58P AND
BARON
58TC
MAINTENANCE MANUAL
CHART 101
TROUBLESHOOTING PROP
DEICE SYSTEM
(PRIOR
TO TK-139 AND TJ-349)
(Cont'd)
I
TROUBLE PROBABLE CAUSE
REMARKS
11.Rapid
brush
wear or
a.Brush block
out
of
a.Check
brush
alignment
as
frequent breakage, alignment,
outlined under ELECTRIC
PROPELLER
DEICER
in Chapter
5-20-00 of this manual.
b.Slip
ring wobbles.
b.Check
slip
ring alignment
with dial indicator.
NORMAL RESISTANCE
AT PIN
LOCATIONS
G=O OHM
(CONTINUITY)
F
1.56 2.04 OHMS
kP
D
1.56 2.04 OHMS
HARNESS
TO TIMER
R1
B (NO CONTINUITY)
P1
~-r-7
L1 AND
La 327 LAMP AND PANEL
RUN
I I I
MOUNT LAMP HOLDER
D1
TYPICAL CURRENT
BLOCKING DIODE
SW1 SINGLE POLE
5
F
POSITION ROTARY
SWITCH
OFF
SW1
SW2
4 POLE DOUBLE
THROW TOGGLE SWITCH
D I
I
P1 ANS AMPHENOL
PLUG
D1 I I I I i
R1 ANS AMPHENOL
LEFT
L1 I
RECEPTICAL
"F"
MULTIMErrRd~J1
L2
OFF
J1 AND J2 TO BE
COMPATIBLE
WITH
RIGHT
J
METER LEADS BEING USED
"D"
SW2
JACKS
ALIGATOR CLIP
GROUND TO
STRUCTURE
Electrothermal
Propeller Deice Test Unit
Figure 101
TROUBLESHOOTING ELECTROTHERMAL
deice
ammeter
may
indicate
an
output
PROPELLER DEICE SYSTEM
(TK-139
AND voltage
outside the normal
operating
range
AFTER,
TJ-349 AND AFTER)
(28.25
+.25
vdc)
rather than
a
defect in
the deice
system
itself. Excessively high
Propeller deice
ammeter
reading outside
operating voltage ~could conceivably
dam-
the shaded
area
of the
meter
(14-18
age the deice system and
create
a
multiple
amperes)
is
an
indication that
a
fault
may
fault
condition;
therefore,
operation
exist in
the deice
system.
It should
be should
not
be
instituted until the fault
noted, however, that
current
readings
or
faults
have been corrected. Use of
above
or
below the shaded
areas
of
the battery
power
alone, during operation
of
30-60-00
Page
105
A22
May
22/87