58
GTN 625/635/650 Cockpit Reference Guide
190-01004-04 Rev. N
Messages
Message
Description
Action
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 fly the approach using
published LNAV minimums.
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.
APR GUIDANCE
AVAILABLE -
Press “Enable APR
Output” before
selecting APR on
autopilot.
The GTN is configured
for KAP140/KFC225
autopilot, and approach
guidance is now
available.
Press the “Enable APR Output”
key on the GTN, this will cause
the autopilot to go into ROL
mode. Engage the autopilot into
approach mode.
CDI/HSI FLAG -
Main lateral/
vertical flag
on CDI/HSI is
inoperative.
The Main Lateral
Superflag or Main
Vertical Superflag
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.
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.
Summary of Contents for GTN 625
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