88
GTN 725/750 Cockpit Reference Guide
190-01007-04 Rev. K
Messages
Message
Description
Action
TRANSPONDER
1 OR 2 -
Transponder has
failed.
The transponder has
detected an internal
fault and transponder
functionality may be
unavailable.
Contact dealer for service.
TRANSPONDER
1 OR 2 -
Transponder is in
ground test mode.
The transponder is
operating in a mode
intended for ground
testing.
Cycle the power to the transponder.
TRANSPONDER
1 OR 2 -
Transponder
overtemp.
The transponder is
reporting that its
internal temperature
has exceeded upper
operating limits.
Decrease temperature and increase
airflow near the transponder, if
possible. Monitor aircraft electrical
indications. Contact dealer for
service if this message persists.
TRANSPONDER
1 OR 2 -
Transponder
undertemp.
The transponder is
reporting that its
internal temperature
has exceeded lower
operating limits.
Contact dealer for service if this
message persists.
TRUE NORTH
APPROACH -
Verify NAV Angles
are referenced to
True North (T).
A procedure is loaded
that is referenced
to true north and
the active leg has a
published true north
reference.
Verify the NAV Angle is set to True
North.
USER WAYPOINT
IMPORT -
User
waypoints
were imported
successfully.
All user waypoints
were imported
successfully.
No action is necessary; message is
informational only.
