Weight And Balance; Compass Safe Distance - Avidyne IFD540 Installation Manual

5.8 Weight and Balance

After installing the IFD5XX, the aircraft's weight and balance must be updated after
installation is complete.
For those installations where an IFD5XX is replacing a GNS530 (any variant), since the
IFD5XX is within 5% of the weight of the removed GNS530 (less than 1 pound difference), no
new weight and balance must actually be performed according to AC 43.13-1B Change 1
Acceptable Methods, Techniques, and Practices Aircraft Inspection and Repair (Chapter 10)
and AC 120-27E Aircraft Weight and Balance Control.

5.9 Compass Safe Distance

The IFD5XX should be installed 12" or more away from the aircraft's magnetic compass.
Perform an aircraft compass swing/calibration after completing the IFD5XX installation.
Note: The 12" minimum distance is a TSO-driven value that is designed to ensure the unit
will have no impact on the aircraft compass. If an installation is made where this distance is
less than 12", then a compass swing/calibration must be accomplished after completing the
IFD5XX installation.
600-00299-000 Page 55 of 198
IFD5XX Installation Manual
Revision: 02