Garmin GFC 500 Maintenance Manual page 40

9.3.2.4 VOR Mode Check
1. Set the Course pointer on the CDI 15 degrees to the left of aircraft heading and ensure
that the CDI is displaying VOR navigation information.
2. Simulate a VOR signal with a "TO" course equal to the aircraft heading.
3. Engage the autopilot by pressing the AP button on the GMC 507.
4. Verify ROL and PIT are displayed on the G5.
5. Press the NAV button on the GMC 507.
6. Verify that VOR is displayed in white with ROL, AP, and PIT in green on the G5.
7. Verify that the flight director command bars are displayed in level pitch and roll attitude.
8. Slowly adjust the course pointer on the CDI toward the aircraft heading.
9. When the course pointer is within approximately five degrees of the aircraft heading,
verify that that VOR displays green on the G5 and that ROL is not displayed on the G5.
10. Center course pointer on the aircraft heading.
11. Adjust the simulated course and the aircraft course pointer 20 degrees to the left of
current aircraft heading.
12. Verify that the flight director command bars indicate a left turn and that the flight controls
move toward a left turn.
13. Adjust simulated course to aircraft heading.
14. Adjust the simulated course on the nav test set and the aircraft course pointer 20
degrees to the right of current aircraft heading.
15. Verify that the flight director command bars indicate a right turn and that the flight
controls move toward a right turn.
16. Adjust the simulated course to aircraft heading.
17. Press the NAV button on the GMC 507.
18. Verify ROL and PIT are displayed on the G5.
19. Press the AP DISC/TRIM INT switch to disengage the autopilot.
20. Press the FD button to remove the flight director bars from the G5
GFC 500 Autopilot with ESP Part 23 AML STC Maintenance Manual
190-02291-01
Page 33
Revision 1