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G1000 System Maintenance Manual
Page 5-11
190-00903-00
Rev.
A
SELECT UNIT
―
PFD1
ARINC 429 WINDOW
Channel LRU Indicator
Status/Recommended
Actions
PFD1/GRS 77 data path is functioning correctly
PFD1/GRS 77 #1 data path is not functioning correctly.
•
Check PFD1 Alert Window for PFD1 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 GRS connecter is secure and proper wire
harness strain relief is provided.
•
Swap GRS1 and GRS2 (if a GRS2 is installed) to
confirm if the problem is in the original GRS1.
−
Replace original GRS1 if box turns green after
swapping units.
•
Swap PFD1 and PFD2 to confirm if the problem is in
the original PFD1.
−
Replace original PFD1 if box turns green after
swapping displays.
•
Check the PFD1/GRS 77 #1 interconnect wiring and
unit connector pins for faults.
•
Replace GRS 77 #1.
IN 1
GRS 77 #1
PFD1/GRS 77 data path functionality is unknown.
Reload PFD1 configuration file.