Airplane Flight Manual Supplement or Supplemental Flight Manual for the NGT-9000
Revision 4 Issue:
9/19/17
Page 23 of 27
Document Number L3-76AK-AFMS1
FAA Approved
Table 3-1: Troubleshooting for the Panel Mount NGT-9000
Symptom
Screen
Cause/Corrective Actions
No FIS-B Coverage
Indicator
It is located on the Weather
screens at the bottom
center.
Weather
The No Coverage Indicator is shown on the weather
display for the following reasons:
1. No FIS-B 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 15 minutes of
test failure)
•
Try clearing the failure performing a warm
startup by tapping the Restart button or 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 L3 Field Service before removal.
•
Display indicator
INITIALIZING (white text)
showing on FIS-B
application screen.
•
ADS-B Out Fail lamp is
Off for 2 minutes and
then flashes (1 second
On/Off) indefinitely until a
GPS position is acquired.
•
Compatible displays may
indicate “STANDBY” or
"DATA-FAIL" and Wi-Fi
information is not
available
Weather
The indication is shown on the weather map indicating
that GPS is Acquiring (On Ground – no previous position
fix).
1. This is a normal condition. It continues to be shown
until internal operations have completed. The GPS
requires approximately 60 to 90 seconds to provide
a position after power is applied to the unit.
2. The GPS signal may be weak. Move the aircraft into
an area where the unit can acquire the GPS signal.
3. Make sure nothing is covering or blocking the GPS
antenna.
4. Cycle power to the unit.
5. Check System Status Messages.
6. Check the Lynx MAT fault log.
7. Check that GPS Antenna Short pin doesn’t get
grounded.
8. Observe the GPS Receiver Information MPC
(Service – GPS) for correct signal strength (C/No)
of the GPS satellites. This has a range from 30 dB
to 50 dB. If this is not the case, then check if the
antenna cable loss is more than 10 dB.
9. Check if 12V power is available at GPS antenna
port, when the unit is powered on.
Contact L3 Field Service before removal of unit.
