Gcu 477 Fms Controller - Garmin G1000 Nxi System Maintenance Manual

GCU 477 FMS Controller

Original GCU 477 Reinstalled
No software or configuration loading is required if the removed GCU 477 is re-installed. This
does not include units that were returned for repair as their software and configuration files are
deleted during the repair testing process. Continue to the GCU 477 Test Section 7.13.3.
New, Repaired or Exchange GCU 477 Installed
If a new, repaired or exchange GCU 477 is installed, the correct software and configuration files
must be loaded to the unit. See Section 3.6 and then continue to the GCU 477 Test Section
7.13.3.
LRU Replacement Procedure GCU 477
1. Open the MFD, PFD 1 (PRI), PFD 1 (SEC), and PFD 2 circuit breakers.
2. Apply power to the G1000 system by connecting external power to the aircraft to
energize the aircraft and avionics electrical busses.
3. Turn on Avionics electrical busses.
4. Power on PFD2, MFD, and PFD1 in configuration mode.
5. Using the PFD1, scroll to the LRU replacement page.
6. Activate the curser and select the installed servo CTL in the LRU dropdown box.
7. Press the Load softkey.
8. Press ENT to acknowledge the process was complete.
9. Select the installed servo MON in the LRU dropdown box.
10. Press the Load softkey.
11. Press ENT to acknowledge the process was complete.
12. Deactivate the curser.
13. Scroll to the Configuration Manager page.
14. Press the CNFM CFG softkey.
15. Select ok when prompted to "Confirm configuration as expected configuration"
16. Power cycle the system. Verify there are no red-Xs or system alerts.
17. If red-Xs or system alerts are present, troubleshoot as necessary using Section 5 or re-
load the system using the legacy method in Section 7.13.2.
18. If there are no red-Xs or system alerts, continue to Section 7.13.3.
Legacy Replacement Procedure GCU 477 (Alternate Method)
1. Insert the software loader card in the top slot of PFD1.
2. Power on PFD2, MFD, and PFD1 in configuration mode.
3. Select NO when "Do you want to update system files" is displayed on the screen of
PFD1.
4. Select the "SYSTEM UPLOAD" page using the small FMS knob on PFD1.
G1000 NXi System Maintenance Manual
King Air 300 Series
190-00716-N1
Page 321
Revision 1