G1000 Supplemental Maintenance Manual Page 5-7Textron Nav III Series Revision 3190-02128-04GIA2 RS-232Channel LRU Indicator StatusCHNL 2 GRS 79 #1 (if GSU 75is installed)Green GIA2/GSU 75 (AHRS) data path is functioningcorrectly.RedGIA2/GSU 75 (AHRS) data path is not functioningcorrectly.• Load GIA2 and GSU configuration files.• Swap GIA2 and GIA1, reconfigure both GIA’sto their new locations to confirm if the problemis in the original GIA1.o Replace original GIA2 if box turnsgreen after swapping units.• Check the GIA1/GSU 75 interconnect wiringfor faults.o Replace GSU 75 if problem remains.Amber GIA2/GSU 75 data path functionality is unknown.Reload GIA2 configuration files.CHNL 5 GTX 3x5 #1Green GIA2/GTX 3X5 data path is functioning correctly.RedGIA2/GTX 3X5 data path is not functioningcorrectly.• Load GIA2 and GTX 335 or GTX 345 (asapplicable) configuration files.• Swap GIA2 and GIA1, reconfigure both GIA’sto their new locations to confirm if the problemis in the original GIA1.o Replace original GIA2 if box turnsgreen after swapping units.• Check the GIA2/GTX 3X5 interconnect wiringfor faults.• Replace GTX 335 or GTX 345 (as applicable)if problem remains.Amber GIA2/GTX 3X5 data path functionality is unknown.Reload GIA2 configuration files.
