Garmin G3X Pilot’s Guide190-01115-00 Rev. K313AFCSSystemOverviewFlightInstruments EISCNSInterfaceGPSNavigationFlightPlanningHazardAvoidanceAdditionalFeatures AFCS Annun/Alerts Appendix IndexControl Pressed Modes SelectedLateral VerticalNAV Key Navigation**GPSVORLOCBCPitch Hold (default) PITHDG Key Heading Select HDG Pitch Hold (default) PITLVL Key Level Hold LVL Level Hold LVL*Valid VNV flight plan must be entered before VNV Key press activates flight director.**The selected navigation receiver must have a valid VOR or LOC signal or active GPS course beforeNAV orAPR Key press activates flight director.Flight Director Activation (GMC 305)FLIGHT DIRECTOR MODESFlight director modes are normally selected independently for the pitch and roll axes.Unless otherwise specified, all mode keys are alternate action (i.e., press on, press off).In the absence of specific mode selection, the flight director reverts to the default pitchand/or roll modes.Armed modes are annunciated in white and active in green in the AFCS Status Box.Under normal operation, when the control for the active flight director mode is pressed,the flight director reverts to the default mode(s) for the axis(es). Automatic transitionfrom armed to active mode is indicated by the white armed mode annunciation movingto the green active mode field and flashing for 10 seconds.If the information required to compute a flight director mode becomes invalid orunavailable, the flight director automatically reverts to the default mode for that axis.A flashing yellow mode annunciation and annunciator light indicate loss of sensor(ADC) or navigation data (VOR, LOC, GPS, VNAV) required to compute commands.When such a loss occurs, the system automatically begins to roll the wings level (entersRoll Hold Mode) or maintain the pitch angle (enters Pitch Hold Mode), depending onthe affected axis. The flashing annunciation stops when the affected mode key ispressed or another mode for the axis is selected. If after 10 seconds no action is taken,the flashing annunciation stops.
