5. Magnetic Compass
A. Description
Magnetic compass is a self-contained instrument. This instrument has an individual light which is
connected to instrument lighting circuit. Compass correction card is located in card holder mounted
on instrument. Compass should be swung whenever instruments or radios are changed and at least
once a year.
B. Troubleshooting
See Chart 3.
CHART 3
TROUBLESHOOTING MAGNETIC COMPASS
Trouble Cause Remedy
Excessive card error. Compass not properly Compensate instrument.
compensated.
External magnetic Locate magnetic
interference. interference and eliminate if
possible.
Excessive card oscillation. Insufficient liquid. Replace instrument.
Card sluggish. Weak card magnet. Replace instrument.
Excessive pivot friction or Replace instrument.
broken jewel.
Liquid leakage. Loose bezel screws. Replace instrument.
Broken cover glass. Replace instrument.
Defective sealing gaskets. Replace instrument.
Discolored markings. Age Replace instrument.
Defective light. Burned out lamp or broken Check lamp or continuity of
circuit wiring.
Card sticks. Altitude compensating Replace instrument.
diaphragm collapsed.
Card does not move when The gears that turn Replace instrument.
compensating screws are compensating magnets
turned. are stripped.
Compass swings erratically Normal.
when radio transmitter is
keyed.
THE NEW PIPER AIRCRAFT, INC.
PA-32-301FT / 301XTC
MAINTENANCE MANUAL
PAGE 4
Feb 19/04
3I4
34-20-00
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