G900X/G950 Installation and Maintenance Manual – Troubleshooting
Page D-15
190-00719-00
Revision D
PFD2 ARINC 429 (if equipped)
Channel LRU Indicator
Status
PFD1/GRS 77 #2 data path is functioning correctly.
PFD1/GRS 77 #2 data path is not functioning correctly.
•
Check PFD Alert Window for PFD or GRS77
configuration or software error messages. Correct
any errors before proceeding.
•
Verify GRS77 #2 status is OK using the AUX –
SYSTEM STATUS PAGE on the MFD. If it is has a
Red-X, troubleshoot why the GRS is offline before
proceeding.
•
Ensure GRS77 #2 connecter is secure and proper wire
harness strain relief is provided.
•
Swap GRS77#1 and GRS77 #2 to confirm if the
problem is in the original GRS77 #2.
−
Replace original GRS77 #2 if box turns green after
swapping units.
•
Swap PFD and MFD to confirm if the problem is in the
PFD.
−
Replace original PFD if box turns green after
swapping displays.
•
Check the PFD1/GRS 77 #2 interconnect wiring and
unit connector pins for faults.
•
Replace GRS 77 #2.
IN 1
GRS 77 #2
PFD1/GRS 77 #1 data path functionality is unknown.
Reload PFD2 configuration file.
PFD1/GDC 74A #2 data path is functioning correctly
PFD1/GDC 74A #1 data path is not functioning correctly.
•
Check PFD Alert Window for PFD or GDC74
configuration or software error messages. Correct
any errors before proceeding.
•
Verify GDC 74 #2 status is OK using the System Status
Page on the MFD. If it has a Red-X, troubleshoot why
the GDC is offline before proceeding.
•
Swap PFD and MFD to confirm if the problem is in the
original PFD.
−
Replace original PFD if box turns green after
swapping displays.
•
Check the PFD/GDC 74 #2 interconnect wiring and unit
connector pins for faults.
•
Replace GDC 74 #2 if problem remains.
IN 2
GDC 74 #2
PFD1/GDC 74A #2 data path functionality is unknown.
Reload PFD2 configuration file.
