Garmin GTN 725 Cockpit Reference Manual page 71

Message
DATALINK-
GSR 56 is inoperative
or connection to GTN
is lost.
DATALINK-
GSR 56 data services
inoperative; registration
required.
DATA LOST-
Pilot stored data was
lost. Recheck settings.
DATA SOURCE-
Pressure altitude
source inoperative or
connection to GTN lost.
DATA SOURCE-
Heading source
inoperative or
connection to GTN lost.
DATA SOURCE-
Radar Altimeter
source inoperative or
connection to GTN lost.
190-01007-04 Rev. D
Description
The GTN is configured
for a Garmin GSR 56
and the GTN cannot
communicate with the
GSR 56. GSR Weather,
Position Reporting, and
Phone Services will be
unavailable.
The GSR 56 is not
registered. GSR Weather,
Position Reporting, and
Phone Services will be
unavailable.
User settings such as map
detail level, NAV range
ring on/off, traffic overlay
on/off, and alert settings
have been lost.
The GTN is configured to
receive pressure altitude
but is not receiving it from
any source.
The GTN is configured
to receive heading
information but is not
receiving it from any
source.
The GTN is configured
to receive radio altitude
information but is not
receiving it from any
source.
GTN 725/750 Cockpit Reference Guide (CRG)
Action
Close the GSR 56 circuit
breaker and ensure the
GSR 56 is receiving power.
Contact dealer for service.
Contact dealer for service.
Recheck settings.
Leg types requiring an
altitude source will no
longer automatically
sequence. Contact dealer
for service.
Heading up map displays
will not be available.
Contact dealer for service.
Radio altitude information
will not be available.
Contact dealer for service.
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