G1000 NXi System Maintenance Manual Page 299
King Air 300 Series Revision 1
190-00716-N1
GDC 7400 Air Data
Original GDC unit is Reinstalled
No software or configuration loading is required if the removed GDC 7400 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. Perform a pitot - static system leak check and
continue to Section 9 if no other service is performed.
Original GDC unit Installed in Opposite Locations for Troubleshooting
No software loading is required if the original GDC #1 and GDC #2 are installed in opposite
locations. Perform Section 7.7.3 if no other service is performed.
New, Repaired or Exchange GDC unit is Installed
If a new, repaired or exchange GDC unit is installed, the correct software and configuration files
must be loaded to the unit.
LRU Replacement Procedure GDC 1 or GDC 2
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 GDC1 or GDC 2, whichever was replaced in the LRU
dropdown box.
7. Press the CHK All softkey.
8. Press the Load softkey.
9. Press ENT to acknowledge the process was complete.
10. Deactivate the curser.
11. Scroll to the Configuration Manager page.
12. Press the CNFM CFG softkey.
13. Select ok when prompted to “Confirm configuration as expected configuration”
14. Power cycle the system. Verify there are no red-Xs or system alerts.
15. 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 7.7.2.
16. If there are no red-Xs or system alerts, continue to Section 7.7.3.
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