Garmin GTN 750 Pilot's Manual page 369

Message
APPROACH
DOWNGRADE -
Approach
downgraded. Use
LNAV minima.
APR GUIDANCE
AVAILABLE -
Press "Enable APR
Output" before
selecting APR on
autopilot.
CDI SOURCE -
Select appropriate
CDI source for
approach.
CDI/HSI FLAG -
Main lateral/
vertical flag
on CDI/HSI is
inoperative.
COM RADIO -
Com radio needs
service.
190-01007-03 Rev. B
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.
The GTN is configured
for KAP140/KFC225
autopilot, and approach
guidance is now
available.
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.
The Main Lateral
Superflag or Main
Vertical Superflag
output has been turned
off due to an over-
current condition.
The com radio is
reporting that it needs
service. The com radio
may continue to
function.
Garmin GTN 725/750 Pilot's Guide
Action
Continue to fly the approach using
published LNAV minimums.
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 6.14
for additional information.
Select the appropriate CDI source
for approach.
Verify course guidance is valid
and correct by crosschecking with
the GTN on-screen CDI and other
navigational equipment. Contact
dealer for service.
Contact dealer for service.
Foreword
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
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Proc
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Map
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Weather
Nearest
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Messages
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Appendix
17-3
Index