Garmin GTN Xi Series, Руководство по обслуживанию

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190-01007-C1 GTN Xi Part 23 AML STC Maintenance Manual
Rev. 1 Page 5-13
5.3.1.2 GPS/SBAS Related Alerts
Table 5-4 GPS/SBAS Alert Troubleshooting Guide
Alert Text Possible Cause Corrective Action
GPS RECEIVER -
GPS receiver has
failed. Check GPS
coaxial for electrical
short.
A failure has been detected
in the GPS/SBAS receiver.
Verify that the center conductor is not shorted
to the braid in the coaxial cable.
Contact Garmin technical support for
assistance.
GPS antenna cable may be
shorted to ground.
GPS RECEIVER -
GPS receiver needs
service.
The GTN Xi has detected an
internal failure in the GPS/
SBAS receiver.
Contact Garmin technical support.
LOSS OF
INTEGRITY (LOI) -
Verify GPS position
with other navigation
equipment.
Improper antenna installation
or coaxial routing.
Check GPS antenna installation, connections,
and cable routing. The GPS antenna must be
mounted on top of the aircraft.
Antenna shaded from
satellites.
Make sure the aircraft is clear of hangars,
buildings, trees, etc.
RF interference at
1575.42 MHz from VHF
COM.
Move GPS antenna further from the COM
antenna.
Add a 1575.42 MHz notch filter in COM
coaxial.
Fix or replace the COM.
Disconnect the ELT antenna coaxial to check
for possible re-radiation.
GPS NAVIGATION
LOST - Insufficient
satellites. Use other
navigation source.
There is no GPS fix available
or the system is in Dead
Reckoning mode.
Wait for GPS satellite geometry to improve.
Ensure the aircraft has a clear view of the sky.
GPS NAVIGATION
LOST - Erroneous
position. Use other
navigation source.
An internal position warning
has occurred.
RAIM has determined that the info from one or
more GPS satellites may be in error.
Ensure the aircraft has a clear view of the sky.
GPS RECEIVER -
Low internal clock
battery.
The GTN Xi has detected a
low battery. Almanac data
may have been lost.
Replace the battery.
MARK ON TARGET -
Waypoint creation
has failed. MOT
requires GPS
position.
Mark on target waypoint
creation has failed because
of missing GPS position.
Wait for GPS satellite geometry to improve.
Ensure the aircraft has a clear view of the sky.
Re-attempt waypoint creation.
SEARCHING SKY -
Search-the-sky in
progress.
The GTN Xi is searching the
sky for GPS satellites.
Wait 20 minutes for the unit to complete the
cycle or until the current position is located.