1-16 Garmin G500 Pilot’s Guide 190-01102-02 Rev. BForewordSec 1SystemSec 2PFDSec 3MFDSec 4HazardAvoidanceSec 5AdditionalFeaturesSec 6Annun.& AlertsSec 7SymbolsSec 8GlossaryAppendix AAppendix BIndexFigure 1-17 System Startup Pages1.2.1 Autopilot TestThe optional GAD 43 Adapter provides attitude and heading information fromthe Garmin GRS 77 Attitude and Heading Reference System to the autopilot.The GAD 43 has the ability to disconnect the autopilot if an error in the GAD 43output or GRS 77 is detected. This disconnect mechanism must be tested priorto each flight in the following manner:1. Upon GDU 620 startup, the AP TEST soft key is available on the GDU 620PFD.2. Engage the AP while on the ground.3. Press the AP TEST soft key and verify that the autopilot disconnects and anautopilot disconnect tone is annunciated by the autopilot.Autopilot DisconnectWhen the GDU 620 attitude monitors have detected an AHRS malfunction,or the inability to actively monitor the AHRS, a "Check Attitude" annunciationwill be displayed on the PFD and the autopilot will automatically disconnect.NOTE: Only appears with the installation of an optional GAD 43Adapter.
