G300 System Annunciations; Ahrs Operation - Garmin G300 Pilot's Manual

g300 SyStem annunCiatiOnS

When an LRU or an LRU function fails, a large red 'X' is typically displayed
over the instrument(s) or data experiencing the failure (Refer to Appendix E,
Abnormal Operation). Upon G300 power-up, certain instruments remain invalid
as equipment begins to initialize. All instruments should be operational within
one minute of power-up. If any instrument remains flagged, the G300 should be
serviced by an authorized repair facility.

ahrS OPeratiOn

The Attitude and Heading Reference System (AHRS) performs attitude,
heading, and vertical acceleration calculations for the G300 System, utilizing GPS,
magnetometer, and air data in addition to information from its internal sensors.
Attitude and heading information are updated on the PFD while the AHRS receives
appropriate combinations of information from the external sensor inputs.
190-00921-00 Rev. D
PFD Initialization
Garmin G300 Pilot's Guide
System Overview
13