75G500/G600 Cockpit Reference Guide190-00601-03 Rev HALERTS ALERTSAlertsRefer to the Airplane Flight Manual and ADAS+ ETM documentation in theevent that Engine Trend Monitor (ETM) alerts are displayed.On Screen AlertsAlert DescriptionADC(1/2) ALT EC• ADC 1 or ADC 2 Altitude Error Correction is unavailable.• Alert is enabled and the ADC is reporting that altitude correctionis unavailable.ADC(1/2) SERVICE • ADC 1 or ADC 2 requires service.ADC CONFIG • ADC configuration error.AHRS(1/2) CAL • AHRS 1 or AHRS 2 calibration version error. Contact repairfacility.AHRS(1/2) GPS• AHRS 1 or AHRS 2 is not receiving any GPS information.• AHRS 1 or AHRS 2 is operating exclusively in no-GPSreversionary mode.• AHRS 1 or AHRS 2 is using the backup GPS information.• AHRS 1 or AHRS 2 is not receiving backup GPS information.• Two GPS devices are configured as present and AHRS 1 is notreceiving GPS data from the backup (2nd) device.AHRS(1/2) SRVC • AHRS1 or AHRS 2 magnetic field model needs update. Thisappears on the ground only.AHRS(1/2) TAS• AHRS1 or AHRS 2 is not receiving true airspeed from ADC.• Displayed heading and attitude data are still valid.• Additional loss of GPS data will cause loss of heading andattitude data.AHRS CONFIG • AHRS configuration error.AHRS MAG DB • AHRS/GDU magnetic field model database version mismatch.ALT KEY INOP • The ALT key is disabled. ALT key not available.ALT NO COMP • No data from one or more altitude sensors.ARINC 429 CONFIG • ARINC 429 configuration error.ARINC 708 CONFIG • ARINC 708 configuration error.AUD NOT AVAIL • Audio system is not available.