Return To Service Information; Gdu 37X; Gsu 73 - Garmin G3X Installation Manual

11 Return to Service Information

These return to service procedures are intended to verify the serviceability of the appliance only. These
tests alone do not verify or otherwise validate the airworthiness of the installation.

11.1 GDU 37X

11.1.1 Original GDU 37X is Reinstalled
No software or configuration loading is required if the original GDU 37X is reinstalled. Continue to
Section 11.2.
11.1.2 Original GDU 37X(s) Installed in a Different Position
No software or configuration loading is required if the GDU 37X is installed in a different location.
Continue to Section 11.2.
11.1.3 New GDU 37X(s) Installed
If a new GDU 37X is installed (new serial number), verify the correct software version on the MAIN
page in configuration mode. Additionally verify that all installed displays have the same software
version, as well as NavData, terrain, and obstacle databases. If the correct software version is not
installed, update the displays to the current G3X system software available on the web. No configuration
is required if the configuration module is still operational. Continue to Section 11.2.
11.1.4 New GDU 37X (PFD) Configuration Module Installed
Ensure that a new configuration module is obtained for the replacement installation. If a new
configuration module is installed and no change is made to the PFD, the PFD will write the required
configuration information to the configuration module. If the PFD and the configuration module are both
replaced, the system will need to be configured (Section 7).
Do not use a used GDU configuration module as a replacement. Data that may reside on
the used configuration module may cause system configuration errors.

11.2 GSU 73

A pitot/static check as outlined in 91.411 and Part 43 Appendix E must be completed if
the pitot/static lines are broken.
11.2.1 Original GSU 73 is Reinstalled
No software or configuration loading is required if the original GSU 73 is reinstalled. Continue to
Section 11.3.
G3X Installation Manual – Return to Service
190-01115-01
NOTE
NOTE
Page 11-1
Revision E