Textron Cessna 172R - Page 459

CESSNA
MODEL
172R
SECTION
9
-
SUPPLEMENTS
SUPPLEMENT
15
-
FAA
APPROVED
a)
If
the
D-Bar is
greater
than
2
to
3
dots
from
center,
|
the
autopilot
will
annunciate
REVARM;
when the
computed
capture
point
is reached
the
ARM
annunciator
will
go
out
and the
selected
back
course
will
be
automatically
captured
and tracked.
b)
If
the
D-Bar is less than
2
to
3
dots
from
center,
the|
HDG
mode
will
disengage
upon
selecting
REV
mode;
the
REV
annunciator
will
illuminate and the
capture/track
sequence
will
automatically begin.
5)
Airspeed
--
MAINTAIN
90
KIAS
minimum
during
autopilot coupled
approaches
(recommended).
9.
GLIDESLOPE
COUPLING
a.
APR
Mode
-
ENGAGED,
Note
GSARM
annunciated.
NOTE
Glideslope
coupling
is
inhibited
when
operating
in NAV
or
REV
modes.
With
NAV
1
selected
to
a
valid
ILS,
glideslope
armed
and
coupling
occurs
automatically
in
the
APR
mode
when
tracking
a
localizer.
b.
At
Glideslope
centering
--
note
ARM
annunciator
goes
out.
NOTE
Autopilot
can
capture
glideslope
from
above
or
below
the
beam.
c.
Airspeed
--
MAINTAIN
90
KIAS
minimum
during
autopilot coupled
approaches
(recommended).
Revision
1
S15-31
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