Grs Ahrs Testing - Garmin CIRRUS PERSPECTIVE SR20 Line Maintenance Manual

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7.4.4 GRS AHRS Testing
Verify attitude and heading on the PFD in normal mode. The AHRS attitude and heading
information displayed should become valid within 1 minute of power‐up, as shown in Figure 7‐
13 provided both GPS receivers have a valid position. If GPS is unavailable, AHRS initialization
may take as long as 2 minutes (the aircraft must remain stationary).
Test the AHRS reversionary paths by pressing the red reversionary mode button on the audio
panel located between the displays. Make sure both displays have valid AHRS information, as
shown in Figure 7‐14.
Page 7-44
Rev. E
Figure 7‐12. AHRS Information Valid
Figure 7‐13. Reversionary Mode AHRS Information
Cirrus Perspective™ Line Maintenance Manual
190-00920-00