61
190-01007-04 Rev. C
GTN 725/750 Cockpit Reference Guide (CRG)
Messages
Message
Description
Action
DATALINK-
GDL 88 control panel
input fault. Check
transponder is in correct
mode.
The GDL 88 has lost
communication with the
transponder.
Contact dealer for service.
DATALINK-
GDL 88 ADS-B fault.
Pressure altitude
source inoperative or
connection lost.
The GDL 88 has lost
communication with the
pressure altitude source.
Contact dealer for service.
DATALINK-
GDL 88 ADS-B traffi c
has failed.
GDL 88 may have lost
GPS position.
The GDL 88 has detected
an internal failure.
Contact dealer for service.
DATALINK-
GDL 88 CSA failure.
The GDL 88 is reporting
to the GTN that the CSA
application has failed.
Traffi c alerting on ADS-B
traffi c is unavailable.
Ensure the aircraft has a
clear view of the sky. If the
problem persists, contact
dealer for service.
DATALINK-
GDL 88 external traffi c
system inoperative or
connection lost.
The GDL 88 has detected
a TAS/TCAS input fault.
Contact dealer for service.
DATALINK-
GDL 88 external traffi c
system has a low
battery.
The GDL 88 is reporting
that the external traffi c
system has a low battery.
Contact dealer for service.
DATALINK-
GDL 88 confi guration
module needs service.
The GDL 88 has detected
a confi guration module
fault.
Contact dealer for service.
DATALINK-
GDL 88 needs service.
GDL 88 has detected an
internal fault.
Contact dealer for service.
Summary of Contents for GTN 725
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