Lynx NGT-9000s
Installation Manual
Table 4-1: Troubleshooting
SYMPTOM
SCREEN CAUSE/CORRECTIVE ACTIONS
Display indicator TRAFFIC
UNAVAILABLE (Amber text)
showing on traffic screen.
Traffic
ADS-B is operational but heading and track are invalid or
GPS is failed. TAS is in Standby. Transponder Mode Control
is “ON” which inhibits the display of relative altitude so traffic
is unavailable.
1. View the GPS page under the information button and
verify GPS is operational. If not, check the GPS
antenna location and ensure that the aircraft is not
inside the hangar or repeater is on if inside the hangar,
GPS antenna is exposed to clear sky.
1. Cycle power to the unit.
2. Check the GPS antenna for problems.
3. Check System Status Messages.
4. Check the Lynx MAT fault log.
5. Contact L-3 Field Service before removal of unit.
•
Other aircraft are not shown
on the traffic screen.
•
Ownship data is displayed.
•
Message: No TIS-B/ADS-R
Coverage.
•
Alternate display shows
normal operation.
•
ADS-B Out Fail lamp is OFF.
•
TIS-B Not in Coverage lamp
is ON.
Traffic
The aircraft is not in an ADS-B (UAT / 1090ES) coverage
area, or the targets are not transmitting ADS-B data, or the
ground station is not transmitting TIS-B data.
1. The symptoms are normal if the target or ground station
is not transmitting TIS-B data.
2. The target or ground station needs to be within line-of-
site range.
3. Contact L-3 Field Service before removal of unit.
•
Other aircraft are not shown
on the traffic screen.
•
Ownship data may or may
not be displayed on the
weather screen.
•
MSG button on screen.
Traffic
Possible hardware problem with the unit.
1. Cycle power to the unit.
2. Check System Status Messages.
3. Check the Lynx MAT fault log.
4. Contact L-3 Field Service before removal of unit.
•
Ownship is shown, but no
traffic is being displayed.
•
ADS-B Out Fail lamp is OFF.
Traffic
Possible problem with the UAT/1090 antenna or RF cables.
1. Cycle power to the unit.
2. Check cable connections.
3. Check System Status Messages.
4. Check the Lynx MAT fault log.
5. Contact L-3 Field Service before removal of unit.
The traffic symbols on the traffic
display are non-directional
(diamond shape).
Traffic
Non-directional traffic symbols on the traffic display is due to
one of the following reasons:
1. The traffic information that is being received by the unit
does not have directional data. The unit continues to
transmit non-directional data to the traffic display.
Note - TAS traffic is not displayed as directional. A TAS
/ ADS-B correlated target will use the ADS-B/TIS-B
directional information.
2. An alternate (secondary) traffic display does not
support the STIF data format necessary to show
directional data provided by ADS-B.
Page 4-6
Maintenance
0040-17001-01
January 15, 2015
Revision A
