Garmin G900X Pilot's Manual page 654

APPENDIX A
System Annunciation
638
Comment
Attitude and Heading
Reference System is aligning.
Display system is not receiving
attitude information from the
AHRS.
AHRS calibration incomplete or
configuration module failure.
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 POH).
Display system is not receiving
airspeed input from air data
computer.
Table A-2 G900X System Annunciations
Garmin G900X Pilot's Guide
System Annunciation
Display system is not receiving
vertical speed input from the
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
valid true airspeed information
from air data computer.
Display system is not receiving
valid OAT information from air
data computer.
Display system is not receiving
valid transponder information.
A red 'X' through any other
display field (such as engine
Other Various Red X
instrumentation fields)
Indications
indicates that the field is not
receiving valid data.
Comment
190-00726-00 Rev. J