System Maintenance Manual

Page 5-6 G1000/GFC700 System Maintenance Manual – C90A/C90GT/C90GTi King Air
Revision G 190-00682-01
PFD 1 ARINC 429
Channel LRU Indicator Status
IN 1 GRS 77 #1
PFD1/GRS 77 #1 data path is functioning correctly.
PFD1/GRS 77 #1 data path is not functioning correctly.
• Verify GRS77 #1 status is “OK” using the System Status
page on the MFD. If it is not, correct condition before
proceeding, reference GRS troubleshooting sections.
• Load PFD1 configuration file.
• Swap PFD1 and PFD2 to confirm if the problem is in the
original PFD1.
o Replace original PFD1 if box turns to a green
checkmark (√) after swapping displays.
• Swap GRS1 and GRS2 (no reconfiguration required) to
confirm if the problem is in the original GRS1.
o Replace original GRS1 if box turns to a green
checkmark (√) after swapping units.
Check the PFD1/GRS 77 #1 interconnect wiring for faults.
PFD1/GRS 77 #1 data path functionally is unknown. Reload
PFD1 configuration file.
IN 2 GDC 74 #1
PFD1/GDC 74 #1 data path is functioning correctly
PFD1/GDC 74 #1 data path is not functioning correctly.
• Verify GDC 74 #1 status is “OK” using the System Status
page on the MFD. If it is not, correct condition before
proceeding, reference GDC troubleshooting sections.
• Load PFD1 and GDC 74 #1 configuration files.
• Swap PFD1 and PFD2 to confirm if the problem is in the
original PFD1.
o Replace original PFD1 if box turns to a green
checkmark (√) after swapping displays.
• Check the PFD1/GDC 74 #1 interconnect wiring for faults.
Replace GDC 74 #1 if problem remains.
PFD1/GDC 74 #1 data path functionality is unknown. Reload
PFD1 configuration file.