Garmin GFC 500 Maintenance Manual page 42

16. Apply right LOC deviation on the test set.
17. Verify that the flight director command bars indicate a right turn and that the flight
controls turn to the right.
18. Center the LOC deviation on the test set.
19. Apply up GS deviation on the test set.
20. Verify that the flight director command bars indicate a pitch up and that the flight controls
drive in the pitch up direction.
21. Apply down GS deviation on the test set.
22. Verify that the flight director command bars indicate a pitch down and that the flight
controls drive in the pitch down direction.
23. Center the GS deviation on the test set.
24. Press the AP DISC/TRIM INT switch to disengage the autopilot.
25. Press the FD button to remove the flight director bars from the G5.
9.3.2.7 IAS Mode Check
An air data test set is required for this section
NOTE: Disable any ADS-B Transmitting equipment for this test to avoid interference with air
traffic control.
1. An air data test set is required for this section.
2. Set the air data test set to 3000 ft. altitude and 120 kts airspeed.
3. Engage the autopilot by pressing the AP button on the GMC 507.
4. Verify ROL and PIT are displayed on the GMC 507.
5. Press the IAS button on the GMC 507.
6. Verify that IAS is displayed in green and PIT extinguishes on the G5.
7. Verify that 120 KT (+/- 2 KT) is displayed to the right of IAS on the G5.
8. Rotate the UP/DN thumbwheel on the GMC 507 UP until 100 KT is displayed to the right
of IAS on the G5.
9. Verify that the flight director command bars indicate a pitch up command and the flight
controls respond in a nose up direction.
10. Rotate the UP/DN thumbwheel on the GMC 507 DN until 140 KT is displayed to the right
of IAS on the G5.
11. Verify that the flight director command bars indicate a pitch down command and the
flight controls respond in a nose down direction.
12. Rotate the UP/DN thumbwheel on the GMC 507 UP until 120 KT is displayed on the G5.
13. Verify that the flight director command bars indicate level pitch attitude.
14. Adjust the air data test set for 100 kts airspeed.
15. Verify that the flight director command bars indicate a pitch down command and the
flight controls respond in a nose down direction.
16. Adjust the air data test set for 140 kts airspeed.
GFC 500 Autopilot with ESP Part 23 AML STC Maintenance Manual
190-02291-01
Page 35
Revision 1