Garmin CIRRUS PERSPECTIVE SR20 Line Maintenance Manual page 67

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MFD ARINC 429
Channel LRU
GRS 77 #2
IN 1 (if
equipped)
Cirrus Perspective™ Line Maintenance Manual
190-00920-00
Indicator
MFD/GRS 77 #2 data path is functioning correctly.
MFD/GRS 77 #2 data path is not functioning correctly.
•
Check PFD Alert Window for MFD or GRS77
configuration or software error messages. Correct any
errors before proceeding.
•
Make sure the GRS77 #2 status is OK using the AUX –
SYSTEM STATUS PAGE on the MFD. If there is a red‐x,
troubleshoot why the GRS is offline before proceeding.
•
Make sure the GRS77 #2 connecter is secure and
proper wire harness strain relief is provided.
•
Swap GRS77 #1 and GRS77 #2 to see 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 see if the problem is in the
MFD.
−
Replace original MFD if box turns green after
swapping displays.
•
Check the MFD/GRS 77 #2 interconnect wiring and unit
connector pins for faults.
•
Replace GRS 77 #2.
MFD/GRS 77 #2 data path functionality is unknown.
Reload MFD configuration file.
Status
Page 5-21
Rev. E