Page D-20
G900X/G950 Installation and Maintenance Manual – Troubleshooting
Revision D
190-00719-00
GIA1 ARINC 429 (continued)
Channel
LRU
Indicator
Status
GIA1/GRS 77 #1 data path is functioning correctly.
GIA1/GRS 77 #1 data path is not functioning correctly.
•
Check PFD Alert Window for GIA or GRS
configuration or software error messages. Correct
any errors before proceeding.
•
Verify GRS77 #1 status is OK using the AUX -
SYSTEM STATUS PAGE on the MFD. If it has a Red-
X, troubleshoot why the GRS is offline before
proceeding.
•
Ensure GRS77 #1 connecter is secure and proper wire
harness strain relief is provided.
•
Swap GIA1 and GIA2, reconfigure both GIA’s to their
new locations to confirm if the problem is in the original
GIA1.
−
Replace original GIA1 if box turns green after
swapping units.
•
Swap GRS77 #1 and GRS77 #2 (if a GRS77 #2 is
installed) to confirm if the problem is in the original
GRS1.
−
Replace original GRS77 #1 if box turns green after
swapping units.
•
Check the GIA1/GRS 77 #1 interconnect wiring and
unit connector pins for faults.
Replace GRS 77 #1.
IN 6
GRS 77 #1
GIA1/GRS 77 #1 data path functionality is unknown.
Reload GIA1 configuration files.