190-02207-A2
GPS 175/GNX 375/GNC 355 Part 23 AML STC Maintenance Manual
Rev. 3
Page 5-11
Figure 5-5 GNX 375 Traffic Alert Troubleshooting
ADS-B traffic
alerting function
inoperative.
ADS-B traffic
function
inoperative.
UAT traffic/FISB
receiver fault.
1090ES traffic
receiver fault.
GNX 375 Traffic Alerts
Cause
Corrective
Action
Cause
Cause
Cause
TSAA application is
unavailable.
The 978 MHz and 1090
MHz Receiver internal
tests have failed.
OR
ADS-B In
Electrical Fault
OR
All installed applications
are reporting unavailable.
978 MHz Receiver internal
test has failed.
1090 MHz Receiver
internal test has failed.
Corrective
Action
Ensure the aircraft
has a clear
view of the sky.
If faults still exist,
contact Garmin.
Corrective
Action
Corrective
Action
Inspect
compatibility of
transponder
antenna and
connections.
Traffic/FIS-B
functions
inoperative.
Cause
ADS-B In Calibration Data
Fault
OR
SW Fault
Corrective
Action
Maintenance
Log Message
GNX reports traffic/FIS-B
functions inoperative:
<condition>
Inspect
compatibility of
transponder
antenna and
connections.
Maintenance
Log Message
GNX 375
reports ADS-B
In Traffic has failed.
Maintenance
Log Message
GNX 375
reports ADS-B
traffic alerting
function inoperative.
Inspect all wiring
and coaxial
cables.
Verify ADS-B In
traffic is properly
configured.
Verify antenna is
compatible.
Reload software
and reconfigure
unit.
Reload software
and reconfigure
unit.
Reload software
and reconfigure
unit.
Reload software
and reconfigure
unit.
Reload software
and reconfigure
unit.
