Garmin G1000 Manual page 670

APPENDIX A
System Annunciation
656
Attitude and Heading Reference System is aligning.
Display system is not receiving attitude information from the AHRS.
Indicates a configuration module failure.
Display system is not receiving airspeed input from air data computer.
Display system is not receiving valid heading input from AHRS.
Display system is not receiving altitude input from the air data computer.
Display system is not receiving vertical speed input from the air data computer.
Display system is not receiving valid transponder information.
Garmin G1000 Pilot's Guide for the Socata TBM 850/900
Comment
190-00709-05 Rev. D