Garmin G1000H Pilot's Manual page 495

APPENDIX A
System Annunciation Comment
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.
GPS information is either not present or is invalid for navigation use.
Note that AHRS utilizes GPS inputs during normal operation. AHRS operation may be degraded if
GPS signals are not present (see AFM).
Other Various Red X A red "X" through any other display field (such as engine instrumentation display) indicates that
Indications the field is not receiving valid data.
Garmin G1000H ™ Pilot's Guide for the Bell 407GX
190-01255-00 Rev. A 483