Magnetic Compass Compensation - THRUSH S2R – G10 Maintenance Manual

AIRCRAFT MAINTENANCE MANUAL

Magnetic Compass Compensation

Locate the aircraft in area suitable for
the method of magnetic
compensation to be used. Close doors
and place flaps in a retracted position.
Set the throttle at cruise position with
engine operating.
switches, alternator, radio and other
equipment in a mode normally used in
flight and proceed with the following:
A. Set adjustment
compensating magnets
Zero position is when the dot on the
screw is lined up with the dot on the
compass frame.
B. Position aircraft in a magnetically
north direction.
compass rose if at all possible, as
they are aligned to magnetic north
for that location. Adjust north-south
adjustment screw until compass
reads exactly north.
8-6
Page
THRUSH AIRCRAFT, INC – MODEL S2R-G10
Figure 8-2: Center Instrument Panel
compass
Place all electrical
screws of
to zero.
Use an approved
C. Position aircraft in a magnetically east
direction. Adjust east-west adjustment
screw until compass reads exactly east.
D. Position aircraft in a magnetically south
direction. Notice the resulting south
error. Adjust north-south adjustment
screw so that one-half of the error has
been removed.
E. Position aircraft in a magnetically west
direction. Notice the resulting west
error. Adjust east-west adjustment
screw so that one-half of the error has
been removed.
F. Recheck the magnetically north and
east directions to confirm that the error
is the same as for south and west
directions.
G. Position aircraft
magnetically 30-degree directions and
record all errors on the deviation card
furnished with the compass.
in successive
Effective: 03/26/2010