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(l)
Verify the calibration by aligning the aircraft with consecutive 90° headings, starting with
360°. Use the same alignment procedure as before and view the digital heading display
on the pilot and copilot PFDs at each of these headings (360°, 90°, 180°, and 270°).
(m) The magnetometer calibration is now complete.
C.
Magnetic Compass
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 (checked for changes in
deviation) whenever instruments or radios are changed, and at least once a year.
(1) Troubleshooting
See Chart 9.
(2) Adjustment
Before attempting to compensate compass, every effort should be made to place the aircraft in
simulated flight conditions; check to see that the doors are closed, flaps in retracted position,
engine running, throttle set at cruise position and aircraft in level flight attitude. Aircraft master
switch, alternator switch, and all radio switches should be in the ON position. All other cockpit
controlled electrical switches should be in the OFF position.
(a) Set adjustment screws of compensator on zero. Zero position of adjusting screws is when
the dot of the screw is lined up with the dot of the frame.
(b) Head aircraft on a magnetic North heading. Adjust N-S adjustment screw until compass
reads exactly North.
(c) Head aircraft on a magnetic East heading and do the same as (b), above, adjusting E-W
adjusting screw.
(d) 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.
(e) Head aircraft on magnetic West and do same as (d), above, adjusting E-W adjustment
screw.
(f)
Head aircraft in successive magnetic 30° degree headings and record compass readings
on appropriate deviation card. Deviations must not exceed +10° on any heading.
34-20-00
PAGE 32
Apr 15/07
PIPER AIRCRAFT, INC.
PA-46-500TP, MALIBU MERIDIAN
MAINTENANCE MANUAL
5E2
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Table of Contents
Troubleshooting
