Garmin G950 Pilot’s Guide for the Tecnam P2006T 190-01146-00 Rev. A8SYSTEM OVERVIEWSYSTEMOVERVIEWFLIGHTINSTRUMENTSEISAUDIO PANEL& CNSFLIGHTMANAGEMENTHAZARDAVOIDANCEAFCSADDITIONALFEATURESAPPENDICESINDEX1.4 SYSTEM OPERATIONNOTE: The G950 system alerts the pilot when backup paths are utilized by the LRUs. Refer to the Appendicesfor further information regarding system-specific alerts.The displays are connected together via a single Ethernet bus for high-speed communication. As shown inFigure 1-1, each IAU is connected to the on-side display. This section discusses normal and reversionary G950display operation, AHRS modes, GPS receiver operation, and G950 System Annunciations.DISPLAY OPERATIONNOTE:In normal operating mode, backlighting can only be adjusted from the PFD (see Section 1.7). Inreversionary mode, it can be adjusted from the remaining display(s).In normal operating mode, the PFD presents graphical flight instrumentation (attitude, heading, airspeed,altitude, vertical speed), replacing the traditional flight instrument cluster (see the Flight Instruments Sectionfor more information). The MFD normally displays a full-color moving map with navigation information (seethe Flight Management Section), while the left portion of the MFD is dedicated to the Engine Indication System(see the EIS Section). Both displays offer control for COM and NAV frequency selection.Figure 1-6 G950 System Normal OperationIn the event of a display failure, the G950 System automatically switches to reversionary (backup) mode. Inreversionary mode, all important flight information is presented on the remaining display(s) in the same formatas in normal operating mode.• PFD failure – MFD enters reversionary mode.• MFD failure – PFD enters reversionary mode.If a display fails, the appropriate IAU-display Ethernet interface is cut off. Thus, the IAU can no longercommunicate with the remaining display (refer to Figure 1-1), and the NAV and COM functions provided tothe failed display by the IAU are flagged as invalid on the remaining display. The system reverts to backuppaths for the AHRS, ADC, Engine/Airframe Unit, and Transponder, as required. The change to backup paths iscompletely automated for all LRUs and no pilot action is required.