Magnetic Compass - Piper Navajo Chieftain PA-31-350 Service Manual

NAVAJO CHIEFTAIN SERVICE MANUAL
10-45. MAGNETIC COMPASS.
10-46. GENERAL. The magnetic compass is a self-contained instrument. This instrument has an individual
light which is connected to the instrument lighting circuit. The compass correction card is located in the
card holder mounted on the instrument. The compass should be swung whenever instruments or radios are
changed and at least once a year.
10-47. TROUBLESHOOTING.
TABLE X-VII. MAGNETIC COMPASS
Trouble
Cause
Remedy
Excessive card error.
Compass not properly
compensated.
Compensate instrument.
External magnetic
interference.
Locate magnetic inter-
ference and eliminate
if possible.
Excessive card
oscillation.
Improper mounting on
instrument panel.
Align instrument.
Insufficient liquid.
Replace or repair
instrument.
Card sluggish.
Weak card magnet.
Replace or repair
instrument.
Instrument too
heavily compensated.
Excessive pivot fric-
tion or broken jewel.
Remove excess
compensation.
Replace or repair
instrument.
Liquid leakage.
Loose bezel screws.
Replace or repair
instrument.
Broken cover glass.
Defective sealing
gaskets.
Replace or repair
instrument.
Replace or repair
instrument.
Replace or repair
instrument.
Discolored markings.
Age.
Defective light.
Burned out lamp or
broken circuit.
Check lamp or conti-
nuity of wiring.
Reissued: 9/23/80
INSTRUMENTS
3B15