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GTN 625/635/650 Cockpit Reference Guide (CRG)
190-01004-04 Rev. C
Messages
Message
Description
Action
APPROACH NOT ACTIVE-
Do not continue GPS
approach.
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).
Abort the approach, and
execute a non-GPS based
approach.
APPROACH
DOWNGRADE-
Approach downgraded.
Use LNAV minima.
Approach has been
downgraded from
LPV or LNAV/VNAV,
to an LNAV approach.
Vertical guidance will
be removed from the
external CDI/HSI display.
Continue to fl y the approach
using published LNAV
minimums.
APR GUIDANCE
AVAILABLE-
Touch “Enable APR
Output” before selecting
APR on autopilot.
The GTN is confi gured
for KAP140/KFC225
autopilot, and approach
guidance is now
available.
Touch the “Enable APR
Output” button on the GTN,
this will cause the autopilot
to go into ROL mode.
Engage the autopilot into
approach mode.
CDI SOURCE-
Select appropriate CDI
source for approach.
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.
Select the appropriate CDI
source for approach.
CDI/HSI FLAG-
Main lateral/vertical fl ag
on CDI/HSI is inoperative.
The Main Lateral
Superfl ag or Main
Vertical Superfl ag
output has been turned
off due to an over-
current condition.
Verify course guidance
is valid and correct by
crosschecking with the GTN
on-screen CDI and other
navigational equipment.
Contact dealer for service.
Summary of Contents for GTN 625
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