Gsu 75B Adahrs - Garmin G1000 Nxi System Maintenance Manual

GSU 75B ADAHRS

Original GSU unit is Reinstalled
No software or configuration loading is required if the removed GSU 75B is re-installed in the
same location. 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.
Original GSU unit Installed in Opposite Locations for Troubleshooting
No software loading is required if the original GSU #1 and GSU #2 are installed in opposite
locations. Perform a pitot - static system leak check and continue to Section 9.
New, Repaired or Exchange GSU unit is Installed
If a new, repaired or exchange GSU unit is installed, the correct software and configuration files
must be loaded to the unit.
New GSU 75B Configuration Module is Installed
The correct configuration files must be loaded if the GSU75B configuration module has been
replaced.
LRU Replacement Procedure GSU1 or GSU2
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 GRS1 or GRS2 in the LRU dropdown box, whichever was
replaced.
7. Press the CHK All softkey.
8. Press the Load softkey.
9. Press ENT to acknowledge the process was complete.
10. Select GDC 1 or GDC 2 in the LRU dropdown box, whichever was replaced.
11. Press the CHK All softkey.
12. Press the Load softkey.
13. Press ENT to acknowledge the process was complete.
14. Deactivate the curser.
15. Scroll to the Configuration Manager page.
16. Press the CNFM CFG softkey.
17. Select ok when prompted to "Confirm configuration as expected configuration"
18. Power cycle the system. Verify there are no red-Xs or system alerts.
19. 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 7.6.2.
G1000 NXi System Maintenance Manual
King Air 300 Series
190-00716-N1
Page 297
Revision 1