Garmin G3X Pilots Guide - Page 36

Overview System Instruments Flight EIS System Overview AHRS OPERATION The Attitude and Heading Reference System (AHRS) performs attitude, heading, and vertical acceleration calculations for the G3X System, utilizing GPS, magnetometer, and air data in addition to information from its internal sensors. Attitude and heading information are updated on the PFD while the AHRS receives appropriate combinations of information from the external sensor inputs. GPS Data unavailable available Magnetometer Data Magnetometer Data unavailable available unavailable available Air Data Air Data available unavailable available unavailable AHRS Normal Operation AHRS no- AHRS no-Mag/ Mag Mode no-Air Mode Heading Invalid AHRS no-GPS Mode Attitude/Heading Invalid CNS Interface GPS Navigation Flight Planning Hazard Avoidance Additional Features Integrated Autopilot Annun/Alerts Appendix Loss of GPS, magnetometer, or air data inputs is communicated to the pilot by message advisory alerts. Any failure of the internal AHRS inertial sensors results in loss of attitude and heading information (indicated by red 'X' flags over the corresponding flight instruments). If GPS input fails, the AHRS can continue to provide attitude and heading information to the PFD as long as magnetometer and airspeed data are available and valid. 18 Garmin G3X Pilot's Guide 190-01115-00 Rev. F Index