Garmin G3X Pilots Guide - Page 273

System Overview Flight Instruments EIS Integrated Autopilot If the altimeter's barometric setting is adjusted while VNAV mode is active, the Integrated Autopilot increases/decreases the descent rate by up to 500 fpm to reestablish the aircraft on the descent path (without commanding a climb). For large changes, it may take several minutes for the aircraft to reestablish on the descent path. If the change is made while nearing the VNAV waypoint, the aircraft may not reestablish on the descent path in time to level off at the VNAV Target Altitude. In this case, the Integrated Autopilot will revert to Pitch Hold mode upon passing the VNAV waypoint, and Selected Altitude Capture (ALTV) mode will be automatically armed. AUTOMATIC REVERSION TO PITCH HOLD MODE Several situations can occur while VNAV Mode is active which cause the Integrated Autopilot to revert to Pitch Hold Mode: • Vertical deviation exceeds 200 feet during an overspeed condition. • Vertical deviation becomes invalid (the Deviation Indicator is removed from the PFD). Following a reversion to Pitch Hold Mode, VNAV Mode and the appropriate altitude capture mode become armed to allow for possible profile recapture. CNS Interface GPS Navigation Flight Planning Hazard Avoidance Additional Features Integrated Autopilot Annun/Alerts Appendix Index 190-01115-00 Rev. F Garmin G3X Pilot's Guide 255