Figure 5-10. Grs 77 Data Paths - Garmin Diamond DA 40 Maintenance Manual

5.11.3 GRS Redundant Paths
Failure Message
BACKUP PATH – AHRS using
backup data path.
Primary Data Path
ARINC 429
GDU 1040
PFD
ETHERNET
Third Data Path
GDU 1040
PFD
ETHERNET
ETHERNET
No. 1
GIA 63
Page 5-22
Revision 6
Cause
The GRS 77 is using a backup
ARINC 429 data path.
GDU 1040
GRS 77
MFD
GDU 1040
GRS 77
MFD

Figure 5-10. GRS 77 Data Paths

Solutions
•
Check ARINC 429 configuration
settings at the GDU and GIA page
groups:
If configuration is not correct,
reconfigure GDU or GIA as
described in Section 7.
Check wiring.
Replace PFD1 with a known good unit,
to verify location of problem:
If problem persists, replace the
GRS 77.
If problem does not persist,
replace PFD1.
Secondary Data Path
GDU 1040
GRS 77
PFD
ETHERNET
Fourth Data Path
GDU 1040
GRS 77
PFD
ETHERNET
G1000/DA40 System Maintenance Manual
ARINC 429
GDU 1040
MFD
GDU 1040
MFD
ETHERNET
No. 2
GIA 63
190-00303-03