190-01007-C1
GTN Xi Part 23 AML STC Maintenance Manual
Rev. 1
Page 5-21
5.3.1.10 Third-Party Sensors Related Alerts
Table 5-12 Third-Party Sensor Alert Troubleshooting Guide
Alert Text
Possible Cause
Corrective Action
REMOTE KEY STUCK -
Pilot/Co-Pilot voice command
push-to-command key is
stuck.
The remote
push-to-
command
switch has been in
pressed position for at least
30 seconds. This input will
now be ignored.
Press the
PTC
switch to cycle its
operation. Verify wiring to the
PTC
switch. Check for a faulty
PTC
switch.
If the problem persists, contact
Garmin technical support.
STORMSCOPE -
Stormscope is inoperative or
connection to GTN is lost.
Stormscope is not powered
up.
Ensure Stormscope is receiving
power and is connected to ground.
Wiring corrections are
incorrect.
Check wiring.
Stormscope is reporting a
system failure.
Refer to Stormscope installation
manual for troubleshooting.
STORMSCOPE - Invalid
heading received from
Stormscope.
The Stormscope is receiving
invalid heading.
Refer to Stormscope installation
manual for troubleshooting.
DATA SOURCE - Pressure
altitude source inoperative or
connection to GTN lost.
The GTN Xi is configured to
receive pressure altitude, but
is not receiving it from any
source.
If the GTN Xi is not expected to
receive pressure altitude, ensure that
ALTITUDE SOURCE INPUT is
configured for “Not Connected.”
Check RS-232 port setting for the port
that the device is connected to.
Verify the configuration of the other
device.
Verify the GTN Xi RX channel is
connected to the remote device TX
channel.
Verify there is only one TX source per
RX port.
Check wiring.
DATA SOURCE - Heading
source inoperative or
connection to GTN lost.
The GTN Xi is configured to
receive heading, but is not
receiving it from any source.
If the GTN Xi is not expected to
receive heading, ensure that Heading
Source Input and Synchro Heading
Input (GTN 7XX Xi only) are
configured for “Not Connected”.
Check ARINC 429 or RS-232 port
setting for the port connected to the
heading source.
Verify the configuration of the heading
source.
Check the RS-232, ARINC 429, or
Synchro (GTN 7XX Xi only) wiring
between GTN Xi and heading source.