Caution annunciations – Yellow Annunciation Pilot Action Cause CHECK Fly the aircraft manually The GDU 620 attitude ATTITUDE and crosscheck GDU 620 monitors have detected attitude indication with an AHRS malfunction, or Autopilot will standby attitude indicator the inability to actively automatically and other sources of monitor the AHRS output. disconnect. attitude information Note: Only (airspeed, heading, appears with the altitude, etc.) installation of an optional GAD 43 adapter AHRS ALIGN Limit aircraft attitude to Attitude and Heading Keep Wings ±10º bank and ±5º pitch Reference System is – Level as AHRS Aligns - OK to aligning. AHRS may not taxi. align with excessive pitch/bank angles. NO GPS If the system is GPS data on the selected POSITION configured with dual GPS, system is no longer valid. press the 1-2 button. The Moving Map and associated data are not updating. TRAFFIC Visually acquire the traffic The configured traffic to see and avoid. system has determined that nearby traffic may be a threat to the aircraft. No Traffic Use vigilance, as the The configured traffic Data traffic sensor is not able system is not able to to detect traffic. detect traffic and / or provide the pilot with any traffic awareness. Advisories – White Annunciation Pilot Action
Caution annunciations – Yellow Annunciation Pilot Action Cause CHECK ATTITUDE Autopilot will automatically disconnect. Note: Only appears with the installation of an optional GAD 43 adapter Fly the aircraft manually and crosscheck GDU 620 attitude indication with standby attitude indicator and other sources of attitude information (airspeed, heading, altitude, etc.) The GDU 620 attitude monitors have detected an AHRS malfunction, or the inability to actively monitor the AHRS output. AHRS ALIGN – Keep Wings Level Limit aircraft attitude to ±10º bank and ±5º pitch as AHRS Aligns - OK to taxi. Attitude and Heading Reference System is aligning. AHRS may not align with excessive pitch/bank angles. NO GPS POSITION If the system is configured with dual GPS, press the 1-2 button. GPS data on the selected system is no longer valid. The Moving Map and associated data are not updating. TRAFFIC Visually acquire the traffic to see and avoid. The configured traffic system has determined that nearby traffic may be a threat to the aircraft. No Traffic Data Use vigilance, as the traffic sensor is not able to detect traffic. The configured traffic system is not able to detect traffic and / or provide the pilot with any traffic awareness. Advisories – White Annunciation Pilot Action
190-00601-09_01.docx