
G1000 System Maintenance Manual – Diamond DA40/40F Page 7-25
190-00545-01 Revision G
7.7 GRS 77 AHRS / GMU 44 Magnetometer
Original GRS 77 is Reinstalled
If the original GRS 77 was reinstalled, then no software loading is required. 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 Section 7.7.2 if the original unit with no repairs was reinstalled. Continue to
Section 7.7.1 for repaired or exchanged units.
New, Repaired, or Exchanged GRS 77 is Installed
If a new, repaired, or exchanged GRS 77 is installed, install software files. Continue to the software
loading procedure.
Original GMU 44 is Reinstalled
If the original GMU 44 was reinstalled, then no software loading is required. 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 Section 7.7.2 if the original unit with no repairs was reinstalled. Continue to section
7.7.1 for repaired or exchanged units.
New, Repaired, or Exchanged GMU 44 is Installed
If a new, repaired, or exchanged GMU 44 is installed, install software files. Continue to the software
loading procedure.
7.7.1 GRS and GMU Software File Loading
If a new, repaired or exchanged GRS or GMU is installed the correct software files must be loaded.
These units do not have a configuration file to load. Follow the procedure below to load the files.
1. Remove the bottom SD cards from the displays. Note which one was removed from the MFD so
it may be identified later for reinsertion in the MFD when software and configuration loading are
complete. It might contain a FliteChart® or ChartView database which is only used in the MFD.
2. Insert the correct G1000 software loader card that matches the existing G1000 system software
version in the PFD top card slot.
3. Start the displays in configuration mode.
4. On the PFD, go to the System Upload Page using the small FMS knob.
5. Push the FMS knob to activate the cursor, then rotate the small FMS knob to display a drop-down
menu in the AIRFRAME field. Turn the small FMS knob to highlight the correct airframe model
(DA40 or DA40 F) in the menu and press the ENT key.
6. Once an airframe type is selected the cursor moves to the FILE field. Rotate the small FMS knob
to active the drop-down menu. Move the cursor to highlight the appropriate GIA63 model
(WAAS or non-WAAS) and press ENT.
7. Press the CLR ALL softkey.
8. Using the FMS knob and ENT key, select the following file for the unit replaced:
• GRS – software file
• GMU – software file
9. Once the files are selected press the LOAD softkey.
10. When the upload is complete, press the ENT key to select OK in the upload complete window.
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