190-02207-A2
GPS 175/GNX 375/GNC 355 Part 23 AML STC Maintenance Manual
Rev. 3
Page 5-22
Figure 5-11 Miscellaneous Alert Troubleshooting
Heading source
inoperative or
connection lost.
Pressure altitude
source inoperative or
connection lost.
WAAS log
encountered an error
when exporting.
ADS-B log
encountered an error
when exporting.
Stored flight plan
waypoint is not in
current navigation
database.
Miscellaneous Alerts
Cause
Stored flight plan
waypoint has changed
location.
Corrective
Action
Cause
Cause
Cause
Cause
The GPS 175/GNX
375/GNC 355 is
configured to receive
heading information
but is not receiving it
from any source.
The GPS 175/GNX
375/GNC 355 is
configured to receive
pressure altitude but is
not receiving it from
any source.
The WAAS diagnostic
log failed to export to
the SD card.
The ADS-B log failed
to export to the SD
card.
A stored flight plan
waypoint is no longer
in the current
navigation database.
Follow actionable
button and correct
affected flight plan(s)
as necessary.
Corrective
Action
Verify the
configuration settings
for the interface to the
heading source.
Verify the
configuration settings
for the interface to the
pressure altitude
source.
Corrective
Action
If faults still exist,
contact Garmin.
Corrective
Action
Corrective
Action
Corrective
Action
Follow actionable
button and correct
affected flight plan(s)
as necessary.
Check wiring to the
pressure altitude
source.
Format SD card.
Replace SD card.
Cause
A stored flight plan
waypoint has moved
by more than 0.33 arc
minutes from where
previously positioned.
Check wiring to the
heading source.
Remove and inspect
SD card.
Format SD card.
Remove and inspect
SD card.
Replace SD card.
