GRT Avionics, Inc.
May 2019
Sport SX Install. Manual
23
Rev. A
b. Attitude and heading data appears on the screen at the completion of the
alignment period (typically less than 2 minutes).
c. No "ATTITUDE FAIL" message is shown on the PFD screen.
d. No failure messages are listed in the status page (accessible from the
"Status" softkey on the PFD screen).
3.
Select “Set Menu” from the softkeys, and then select the “AHRS Maintenance”
page.
4. Verify AHRS communications status is valid and that the AHRS status is OK.
Verify that the AHRS is receiving serial communications from the display unit by
confirming that there are no grayed-out data fields.
5. Verify the PFD screen shows HDG next to the heading box at the top-center of
the screen; this indicates that it is receiving valid heading data from the
magnetometer.
5-7: Setting AHRS Orientation
This first adjustment is an approximate setting to account for angled instrument panel
installations. You will fine-tune the instrument orientation again in-flight, after validating
the location of the magnetometer (if installed).
1. Access Set Menu > AHRS Maintenance. Scroll to
“Set Instrument Orientation.”
2. Enter the offset, in degrees, for each axis. Positive corrections correspond to right
roll, pitch up and right yaw.
See following figures (not to scale):
Instrument Panel Tilt
20° Pitch Down =
-20 Pitch Offset
Longitudinal Axis
Figure 5-1: AHRS Pitch Orientation Offset