Garmin GTN 725 Cockpit Reference Manual page 64

Message
APPROACH
DOWNGRADE-
Approach downgraded.
Use LNAV minima.
APPROACH NOT
ACTIVE-
Do not continue GPS
approach.
AUDIO PANEL-
Audio panel needs
service.
AUDIO PANEL-
Audio panel is
inoperative or
connection to GTN is
lost.
CDI SOURCE-
Select appropriate CDI
source for approach.
56
Description
Approach has been
downgraded from LPV
or LNAV/VNAV, to an
LNAV approach. Vertical
guidance will be removed
from the external CDI/HSI
display.
GPS approach could
not transition to active
(e.g., the GTN is on an
approach and did not
have the required HPL/
VPL to get into at least
LNAV, so is still in TERM).
The GMA 35 is reporting
to the GTN that it needs
service. The audio panel
may continue to function.
GTN is configured for
Garmin audio panel
control (GMA 35) and the
GTN cannot communicate
with the GMA 35. No
control of the GMA 35
will be possible.
Aircraft is on a GPS
approach but CDI is set
to VLOC, or aircraft is on
VLOC approach and CDI
is set to GPS and aircraft
is less than 2 nm from
the FAF.
GTN 725/750 Cockpit Reference Guide (CRG)
Action
Continue to fly the
approach using published
LNAV minimums.
Abort the approach, and
execute a non-GPS based
approach.
Contact dealer for service.
Remove power from the
GMA 35 audio panel by
pulling the circuit breaker
labeled, "Audio". The pilot
will be able to communicate
with the COM 2 radio.
Contact dealer for service.
Select the appropriate CDI
source for approach.
190-01007-04 Rev. D