Piper Comanche PA-24 Service Manual page 812

PIPER COMANCHE SERVICE MANUAL
1142. Mqnctic Com.,....
11 ..... 3. CcncnJ. The magnetic compus inst1.l1ed
In
the Comanche
i."
a self-conwned instrUment and is
mounted above :hc InsC"Ummc panel on the WIndshield centerStrip. This inltTUmenr has an individual light
which is connected to the instnlment lighting
C'!rCUlt.
The comp . . correction card is located in the card
holder mounted on the instrUment panel.
1144 Troublnhootinl.
Trouble
Excessive card etTor.
Excessi\'c card
OSCIllatIon
!
Cud ,I ugg"h
I
I
I
Liquid ieakage
i Discolored luminous
I
:nukings
Detective light
TABLE XI-VII. MAGNETIC COMPASS
Cause
Compass not properly
campenltared.
External magnetic inter·
ference.
I
Improper mounnng on
In-
nrument panel.
Insufficient liquid.
We~k cud magnet.
Excessive piyot metlon
or broken Jewel.
lnstrument too hea.vily
compensated
Loose bezel screws.
Broken cover glass
Defective sealing gaskets.
I
."ge.
I
Burned. OUt lamp or broken
cm:ult
3
Gll
Remedy
.
-
Compensate instrUment.
Locate magnetIc inter-
ference and eliminate
if pOSSIble.
Aliln instrument.
Replace insrrumcnt.
Replace msrrumcm.
Replace Instrument.
Remove e:o<cess campen-
sation.
Repla.ce instrument.
Replace instrument.
Replace instrume!'tt.
Replace Instrument.
Check tamp or
contlnult~
of wiring.
INSTRUMENTS
ISSUED: SI1Sn2