Installation Manual

Lynx NGT-9000
Installation Manual
0040-17001-01 (Revision W) Maintenance Page 4-8
Table 4-1: Troubleshooting The Panel Mount NGT-9000
SYMPTOM
SCREEN
CAUSE/CORRECTIVE ACTIONS
Traffic display is working
correctly, but TAS/TCAS
aircraft
are not showing up on the
display.
Traffic Lack of data as described below:
1. Aircraft is out of the selected TAS/TCAS
altitude range.
(Above/Below/Unrestricted).
2. The installed Lynx NGT-9000 does not have the
TAS/TCAS functionality.
3. The TAS/TCAS Configuration option is not active.
4. The TAS/TCAS requires other aircraft to be equipped
with equipped with an active ATCRABS transponder.
TIS-B No Coverage Indicator
It is located on the traffic screen
next to the Zoom Out button.
Note: The indicator is
suppressed when TAS/TCAS is
operational (i.e. installed, not
failed, not in standby).
It can be disabled via
configuration options.
Traffic
The No Coverage Indicator is shown on the traffic display for
the following reasons:
1. No TIS-B / ADS-R data available in the area
• Aircraft is not within range of an ADS-B ground
station. Move aircraft in location where information
can be received.
2. UAT-In test fails (indicator seen after 60 seconds of
test failure)
3. 1090 Receiver fails
• Try clearing the failure by cycling power to the unit.
• Check the L-Band antenna or cables for possible
errors.
• If the problem continues, replacement of the L-
Band antenna or the unit may be required. Contact
ACSS Field Service before removal.
Display indicator ON-GND
showing on transponder screen.
Transponder Transponder is operating in the on-ground mode.
1. This is a normal condition when the aircraft is on
ground.
2. If the indication is seen during flight. Contact ACSS
Field Service.
•
Display indicator XPDR FAIL
(Amber text) showing on
transponder screen.
• MSG button on screen.
Transponder Transponder data is invalid. This indication is shown on the
transponder screen and alternate traffic screen.
1. Possible problem with internal hardware.
2. Cycle power to the unit.
3. Check System Status Messages.
4. Check the MPC (MAT) fault log.
5. Contact ACSS Field Service before removal of unit.
Pressure Altitude digits
replaced with amber dashes.
Transponder Invalid Pressure Altitude.
Note: Some altitude encoders may not provide pressure
altitude until after 1-3 minutes of operation.
1. Cycle power to the unit.
2. Check System Status Messages.
3. Check the MPC (MAT) fault log.
4. Check the wiring between the unit and the secondary
equipment supplying the pressure altitude.
5. Check the secondary equipment for problems.
6. Contact ACSS Field Service before removal of unit.