Figure 6-2 Autopilot Test Page - Deviation - Garmin GI 275 Installation Manual

6.3.9.4 VOR/Localizer and Glideslope Deviation Checks
This test verifies that the lateral deviation, vertical deviation, lateral flag/superflag, and vertical flag/
superflag interfaces between the GI 275 and autopilot are correct.
NOTE
Setting lateral and vertical flags will set both the low-level and superflag outputs simultaneously.
1. Power on the GI 275 system in Configuration mode.
2. Navigate to the Deviations page (Calibration/Test → Autopilot → Test → Deviations).
3. Engage HDG/CRS Valid.
4. On the autopilot, engage in HDG mode.
5. On the GI 275, activate the Lateral Flag.
6. On the autopilot, engage in APR mode.
7. On the GI 275, set the Lateral Deviation (Lat) to 30% RT.
8. Verify that the autopilot moves the control yoke or stick to the right.
9. Set the Lateral Deviation (Lat) to -30% LT.
10. Verify that the autopilot moves the control yoke or stick to the left.
11. Set the Lateral Deviation (Lat) to 0%.
12. De-select the Lateral Flag on the Deviations page.
13. On the autopilot, verify that it exits APR mode.
14. On the GI 275, active the Lateral Flag.
15. On the autopilot, re-engage APR mode, if necessary.
16. Go to the Autopilot Test page and activate ILS/GPS Approach (Back → ILS/GPS Approach).
17. On the Deviations page, activate the Vertical Flag and set Vertical Deviation (Vert) to -30% DN.
18. Verify that the autopilot indicates that it is capturing or tracking the glideslope.
19. Verify that the autopilot moves the control yoke or stick forward.
20. Set the Vertical Deviation to 30% UP.
21. Verify that the autopilot moves the control yoke or stick aft.
22. De-select the Vertical Flag on the Deviations page.
23. Verify that the autopilot indicates that it is no longer capturing or tracking the glideslope.
24. Set the Vertical Deviation to 0% and verify the Vertical Flag and the Lateral Flag are de-selected.
25. Disengage the autopilot.
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Rev. 11

Figure 6-2 Autopilot Test Page - Deviation

GI 275 Part 23 AML STC Installation Manual
Page 6-18