Garmin G1000 Nxi System Maintenance Manual page 137

(C) PFD and MFD Ethernet connection check (includes ARINC connection check between
ADC1 and MFD and between GRS1 and MFD, and the DISPLAY BACKUP button check)
1. On the right hand circuit breaker panel, open the MFD circuit breaker:
2. Verify NAV 1, COM 1, NAV 2, and COM 2 remain valid on both PFD 1 and PFD 2.
3. Close the MFD circuit breaker and wait for MFD to initialize.
4. Open the PFD 2 circuit breaker.
5. Press the DISPLAY BACK UP button on the Pilot's GMA 1347D audio panel.
6. Verify NAV 2 and COM 2 are each replaced by a red X and NAV 1 and COM 1 remain
valid on both the MFD and PFD 1.
7. Press the DISPLAY BACK UP button on the Pilot's GMA 1347D audio panel to return to
normal mode.
8. Close the PFD 2 circuit breaker and wait for PFD 2 to initialize.
9. Open the PFD 1 (PRI) and PFD 1 (SEC) circuit breakers.
10. Press the DISPLAY BACK UP button on the Co-pilot's GMA 1347D audio panel.
11. Verify NAV 1 and COM 1 are each replaced by a red X and NAV 2 and COM 2 remain
valid on both the MFD and PFD 2.
12. Verify ADC 1 data and GRS 1 data can be displayed on the MFD.
13. Press the DISPLAY BACK UP button on the Co-pilot's GMA 1347D audio panel to return
to normal mode.
14. Close the PFD 1 (PRI) and PFD 1 (SEC) circuit breakers and wait for PFD 1 to initialize.
(D) Engine data availability to the displays and GPS data availability to the AHRS with
either GIA inoperative check
1. Open GIA1 primary and secondary CBs.
2. Verify the following:
•
NAV 1 and COM 1 tuning fields on PFD 1 and PFD 2 are invalid (red X).
•
L/R engine data remains valid.
•
XPDR1 is Inoperative.
•
GMA1 is Inoperative.
•
AHRS1 is using backup GPS source.
•
AHRS2 not receiving backup GPS Information.
•
An amber BOTH ON GPS2 is displayed on PFD 1 and PFD 2.
•
AHRS and ADC data remain valid on PFD 1 and PFD 2.
3. Close GIA1 primary and secondary CBs. Allow system to re-acquire satellites and
return to normal display modes.
4. Open GIA2 CB.
5. Verify the following:
•
NAV 2 and COM 2 tuning fields on PFD 1 and PFD 2 are invalid (red X).
G1000 NXi System Maintenance Manual
King Air 300 Series
190-00716-N1
Page 124
Revision 1