
190-02207-A2
GPS 175/GNX 375/GNC 355 Part 23 AML STC Maintenance Manual
Rev. 3
Page 5-18
Figure 5-8 Database Alert Troubleshooting
Terrain/Obstacle database
not available.
Verify user-modified
procedures in stored flight
plans are correct.
A procedure has been
modified in a cataloged
flight plan.
GPS 175/GNX 375/GNC
355 SD card is invalid or
failed.
Database Alerts
Cause
Corrective
Action
Cause
Cause
Cause
The terrain or obstacle
database is missing or
corrupt.
A stored flight plan
contains user-modified
procedures, and a
navigation database
update has occurred
where the procedure
has changed.
A new database
update caused a flight
plan to be truncated
because the flight plan
now has more than
100 waypoints due to
an updated procedure
or the flight plan was
truncated when it
removed a procedure
because it no longer
exists in the database.
External SD card has an
error or has failed.
Corrective
Action
If faults still exist,
contact Garmin.
Corrective
Action
Corrective
Action
Reload the
external SD card.
Verify airways
in stored flight
plans are correct.
Cause
A stored flight plan
contains an airway that is
no longer consistent with
the current navigation
database.
Corrective
Action
Touch the
Show flight plan/catalog
actionable button and
remove or correct the
affected procedure/flight
plan.
Reload the
databases on the
external data card.
Replace the
external SD card.
Terrain display unavailable
for current location.
Cause
Corrective
Action
Terrain database cannot
provide elevation at the
current GPS position.
Aircraft is outside terrain
database coverage area.
Reload the correct
databases on the
external data card.
Touch the
Show flight plan/catalog
actionable button and
remove or correct the
affected procedure/flight
plan.
Touch the
Show flight plan/catalog
actionable button and
remove or correct the
affected procedure/flight
plan.
A procedure has been
modified in a cataloged
flight plan.
Cause
A new database
update caused a flight
plan to be truncated
because the flight plan
now has more than
100 waypoints due to
an updated procedure
or the flight plan was
truncated when it
removed a procedure
because it no longer
exists in the database.
Corrective
Action
Touch the
Show flight plan/catalog
actionable button and
remove or correct the
affected procedure/flight
plan.