Piper Aircraft Corporation Malibu Mirage PA-46-350P, Airplane Maintenance Manual

Page: 984 / 1956

PAGE 38
Feb 28/07
5E18
34-20-00
PIPER AIRCRAFT, INC.
PA-46-350P, MALIBU MIRAGE
MAINTENANCE MANUAL
8 . 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.
A. Troubleshooting
S ee Chart 1 3 .
B. 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.
(1) S et 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.
(2) Head aircraft on a magnetic North heading. Adjust N- S adjustment screw until compass reads
exactly North.
( 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 S outh heading and note resulting S outh 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 3 0° degree headings and record compass readings on
appropriate deviation card. Deviations must not 10° on any heading.