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16-3190-01004-03 Rev. B
Garmin GTN 625/635/650 Pilot’s Guide
Foreword
Getting
Started
Xpdr Ctrl
Com/Nav
FPL
Direct-To
Proc
Wpt Info
Map
Traffic
Terrain
Weather
Nearest
Music
Utilities
System
Messages
Symbols
Appendix
Index
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.
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”
button on the GTN, this will cause
the autopilot to go into ROL
mode. Engage the autopilot into
approach mode. See section 6.15
for additional information.
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 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.
COM RADIO -
Com radio needs
service.
The com radio is
reporting that it needs
service. The com radio
may continue to
function.
Contact dealer for service.