1-11190-01102-02 Rev. E Garmin G500 Pilot’s GuideForewordSec 1SystemSec 2PFDSec 3MFDSec 4HazardAvoidanceSec 5AdditionalFeaturesSec 6Annun.& AlertsSec 7SymbolsSec 8Glossary Appendix AAppendix BIndex1.2 System Power UpNOTE: See the Aircraft Flight Manual (AFM) for specific proceduresconcerning avionics power application and emergency power supplyoperation.NOTE: Refer to Section 6 for system-specific annunciations and alerts.The G500 System is integrated with the aircraft electrical system and receivespower directly from electrical busses. The GDU 620 and supporting sub-systemsinclude both power-on and continuous built-in test features that exercise theprocessor, memory, external inputs, and outputs to ensure safe operation.During system initialization, test annunciations are displayed. All systemannunciations should disappear typically within the first 30 seconds after power-up. Upon power-up, bezel key backlights also become momentarily illuminatedon the GDU 620 display bezel.On the PFD, the AHRS begins to initialize and “AHRS ALIGN: Keep WingsLevel” is displayed. The AHRS should display valid attitude and heading fieldstypically within the first minute after power-up. The AHRS can align itself bothwhile taxiing and during level flight.NOTE: Fastest AHRS alignment is achieved with the aircraft stationaryand with all AHRS inputs valid (3-D GPS position, magnetometer, andair data). During initial power up on the ground, no GPS position and/ormagnetic anomalies are common. If the aircraft is taxied prior to AHRSalignment, alignment may be delayed until after a valid 3-D GPS positionis available.NOTE: During in-flight alignment of the AHRS, minimize aircraftmaneuvering. The AHRS will align with shallow banking and pitch angles(less than 20 degrees of roll or 5 degrees of pitch). AHRS alignment maynot be possible during more aggressive maneuvers.
