Maintenance Manual 190-02472-02G3X Touch EFIS Part 23 AML STC Revision 2Page 243.2.2.3 System Status IndicatorsThe “System Information” page in the configuration mode of the GDU 4X0 PFD has a “Devices Online”tab that reports the status of installed LRU’s and their currently installed software part numbers andversions. The icon/checkbox next to each LRU reports a green checkmark, a ‘red x’ or blank checkbox toindicate the status of each LRU as described in Table 3-1.Table 3-1 – LRU Status Indicator SymbolsINDICATION LRU CONDITIONThe LRU is online and reports the item located next to theindicator box is communicating.The LRU is online, and reports the item located next to theindicator box is not communicating, a fault, warning, orerror has been detected.The LRU is not online.3.2.2.4 Configuration Mode NavigationUsing the PFD knob and data entry options as described in Sections 3.2.2.1 and 3.2.2.2 a user cannavigate through different pages and page groups in the Configuration Mode. Reference the Garmin G3XTouch EFIS Part 23 AML STC Installation Manual (190-02472-01) on how to make configurationchanges.NOTESome configuration pages appear only when certain optional LRUs are installed and configured.Figure 3-9 – Configuration Mode Pages
