3. Head aircraft on a magnetic East heading and do the same as Step 2, adjusting E-W adjusting screw.
4. Head aircraft on a magnetic South heading and note resulting South error. Adjust N-S adjusting screw
until one-half of this error has been removed.
5. Head aircraft on magnetic West and do same as Step 4, adjusting E-W adjustment screw.
6. Head aircraft in successive magnetic 30° degree headings and record compass readings on appropriate
deviation card. Deviations must not exceed ± 10° on any heading.
CHART 3406. TROUBLESHOOTING (MAGNETIC COMPASS)
Trouble Cause Remedy
Excessive card error. Compass not properly Compensate instrument.
compensated.
External magnetic inter- Locate magnetic inter-
ference. ference 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 compen- Replace instrument.
compensating screws are sating magnets are stripped.
turned.
Compass swings erratically Normal.
when radio transmitter is
keyed.
34-10-07
Page 34-11
December 1, 1978
2G19
PIPER AIRCRAFT
PA-28RT-201 / 201T
MAINTENANCE MANUAL
To Next Page
Loading...
Need help?
General