Garmin G1000 Maintenance Manual page 95

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Advisory Message
MANIFEST – GIA1 software
mismatch. Communication
Halted.
MANIFEST – GIA2 software
mismatch. Communication
Halted.
GIA1 SERVICE – GIA1 needs
service. Return unit for repair.
GIA2 SERVICE – GIA1 needs
service. Return unit for repair.
5.1.6.10 GDC 74B Related Advisory Messages
Advisory Message
MANIFEST – GDC 74B#1
software mismatch
Communication halted.
MANIFEST – GDC 74B #2
software mismatch
Communication halted.
BACKUP PATH – Airdata
using backup data path.
5.1.6.11 GRS 77 Advisory Messages
Advisory Message
AHRS1 TAS – AHRS1 not
receiving airspeed.
AHRS2 TAS – AHRS2 not
receiving airspeed.
G1000 System Maintenance Manual
190-00903-00
Possible Cause
The system has detected an
incorrect software version
loaded in GIA 1.
The system has detected an
incorrect software version
loaded in GIA 2.
The G1000 has detected a
failure in GIA1.
The G1000 has detected a
failure in GIA2.
Possible Cause
The system has detected an
incorrect software version
loaded in the GDC 74B #1.
The system has detected an
incorrect software version
loaded in the GDC 74B #2.
The GDC 74B is using a
backup ARINC 429 data path.
Possible Cause
The GRS 77 #1 is not
receiving airspeed
information from the GDC
74B #1.
The GRS 77 #2 is not
receiving airspeed
information from the GDC
74B #2.
Recommended Actions
Load correct software version.
Replace GIA1.
Replace GIA2.
Recommended Actions
Load correct software version.
Troubleshoot for a failed datapath
using Section 5.1.5.
Recommended Actions
a. Check GRS #1/GDC 74B #1
interconnect.
b. Replace the GDC 74B #1
c. If problem persists, replace the
GRS 77 #1
a. Check GRS #2/GDC 74B #2
interconnect
b. Replace the GDC 74B #2
c. If problem persists, replace the
GRS 77 #2
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