Cessna T188C - Trouble Shooting (Calibration); 15-39. Magnetic Compass; Description; Turn and Slip Indicator

MODEL
188
& T188
SERIES
SERVICE
MANUAL
X
_
^^^^2
A
,,-
Detail A < I
1.
Mounting
Bracket
2.
Shock Mount
3.
Compass
4. Compass Light
Figure
15-4.
Magnetic
Compass.
15-39. MAGNETIC
COMPASS.
(Refer to
figure
plished by removing
the screws
securing compass
to
15-4.)
canopy
structure
as shown
in figure
15-4. The
light
wires
have
quick-disconnects
located
near
the
com-
15-40. DESCRIPTION.
The magnetic compass is
pass to facilitate compass
removal and installation.
liquid-filled,
with
expansion
provisions
to compen-
sate for
temperature
changes. It is
equipped with
15-41.
TURN-AND-SLIP
INDICATOR.
compensating
magnets
adjustable
from
the front
of
the
case. The compass
is internally
lighted, con-
15-42.
DESCRIPTION.
The turn-and-slip
indicator
trolled by the
instrument lights
rheostat switch.
No
is operated by
the aircraft electrical
system
and
maintenance
is required on
the compass except
an
operates ONLY
when the master
switch is
on. Its
occasional check on a compass
rose and replacement
circuit is protected by an automatically-resetting
of lamp. Removal
of the compass
may be accom-
circuit breaker.
15-43.
TROUBLE
SHOOTING.
TROUBLE
PROBABLE
CAUSE
REMEDY
INDICATOR
POINTER Automatic
resetting circuit
Replace circuit breaker.
FAILS TO
RESPOND.
breaker
defective.
Master
switch
"OFF"
or
Replace
defective
switch.
switch
defective.
Broken
or grounded
lead
to
Repair
or
replace defective
indicator.
wiring.
Indicator not
grounded.
Repair or replace
defective wire.
Defective
mechanism.
Replace instrument.
15-12