79
190-01007-04 Rev. K
GTN 725/750 Cockpit Reference Guide
Me
ssage
s
Message
Description
Action
KNOB STUCK -
Volume knob
is stuck in the
pressed position.
The Volume knob has
been in pressed position
for at least 30 seconds.
This knob press will
now be ignored.
Verify the volume knob is not
pressed. Contact dealer for service
if this message persists.
LOCKED FLIGHT
PLAN
Cannot activate
a flight plan
containing a locked
waypoint.
The user is trying to
activate a flight plan
that contains a locked
waypoint.
Unlock the flight plan by modifying
stored flight plans as necessary
to include waypoints, procedures,
and airways that are in the current
navigation database.
LOSS OF
INTEGRITY (LOI)-
Verify GPS
position with
other navigation
equipment.
Antenna may be shaded
from satellites. The GPS
module has reported a
loss of integrity.
Make sure the aircraft is clear of
hangars, buildings, trees, etc. Use a
different GPS receiver or a
non-GPS based source of
navigation. Contact dealer for
service if this message persists.
MAGNETIC
NORTH
APPROACH -
Verify NAV angles
are referenced
to magnetic
north (magnetic
variation).
The NAV angle is not
set to Magnetic and a
magnetic approach is
loaded.
Change NAV angle setting to
Magnetic.
MAGNETIC
VARIATION -
Aircraft in area
with large mag var.
Verify all course
angles.
MagVar is flagged
as unreliable in the
MagVar database.
This normally occurs
when operating at high
latitudes that do not
support a NAV Angle of
Magnetic.
Verify that the geographical region
supports navigation based on
magnetic variation.
