Garmin G1000 NXi Supplemental Maintenance Manual page 120

7. Repeat steps 5 and 6 and re-transmit while monitoring GPS 2 signal levels on the MFD.
8. Repeat steps 4 through 7 for each of the following frequencies:
•
121.175 MHz
•
121.200 MHz
•
131.250 MHz
•
131.275 MHz
•
131.300 MHz
9. Repeat steps 4 through 8 for the No. 2 COM transceiver (GIA2).
10. On the MFD, select the Aux – System Setup page.
11. Under the COM CONFIG field, change the COM channel spacing from 25 kHz to 8.33
kHz.
12. Go back to the Aux – GPS Status page.
13. Select 121.185 MHz on the No. 1 COM transceiver.
14. Transmit for a period of 35 seconds while monitoring GPS 1 signal strength levels.
15. During the transmit period, verify that the GPS "INTEG" flag does not come into view on
the PFD and verify that GPS 1 does not lose a 3-D navigation solution on the MFD.
16. Repeat steps 14 and 15 and re-transmit while monitoring GPS 2 signal levels on the
MFD.
17. Repeat steps 14 through 16 for each of the following frequencies:
•
121.190 MHz
•
130.285 MHz
•
131.290 MHz
18. Repeat steps 14 through 17 for the No. 2 COM transceiver (GIA2).
19. On the MFD, select the Aux – System Setup page and change the COM channel
spacing back to 25 kHz.
VOR/LOC/GS Test
Check the VOR, ILS, and Glideslope functions with ramp test equipment. Operate the
equipment according to the test equipment manufacturer's instructions. Adjust the RF signal to
a level adequate to perform the test. Select the appropriate HSI source by using the CDI
softkey.
The PFD HSI does not show a course deviation bar unless a valid VHF NAV
frequency is tuned.
GFC 700 VOR/LOC/GS Test (if GFC 700 is installed)
1. Simulate a VOR signal on a radial equivalent to the aircraft heading. Tune the NAV 1
and NAV 2 receivers to the simulation frequency.
G1000 Supplemental Maintenance Manual
Textron Nav III Series
190-02128-04
NOTE
Page 7-15
Revision 3