Textron Cessna 172R - Page 410

SECTION
9
-
SUPPLEMENTS
SUPPLEMENT
7
-
FAA
APPROVED
CESSNA
MODEL
172R
|
2)
If
the
CD
I
needle
is less
than
2
to
3
dots
from
center,
the
HDG
mode
will
disengage
upon
selecting
APR
mode;
the
APR
annunciator
will
illuminate and the
capture/track
sequence
will
automatically
begin.
2.
When
equipped
with
HSI:
a.
Course
Bearing
Pointer
--
SET
to
desired
course.
b.
Heading
Selector
Knob
--
SET
BUG
to
provide
desired
intercept
angle.
c.
APR
Mode
Selector
Button
--
PRESS.
|
1)
If
the
D-Bar
is
greater
than
2
to
3
dots
from
center,
the
autopilot
will
annunciate
APRARM!
when
the
computed
capture
point
is reached the
ARM
annunciator
will
go
out
and the
selected
course
will
be
automatically
captured
and
tracked.
|
2)
If
the
D-Bar is less
than
2
to
3
dots
from
center,
the
HDG
mode
will
disengage
upon
selecting
APR
mode;
the
APR
annunciator
will
illuminate and the
capture/track
sequence
will
automatically begin.
d.
Airspeed
-
MAINTAIN
90
KIAS
during
autopilot approaches
(recommended).
BACK
COURSE
(REV)
APPROACH
COUPLING
(i.e.,
reverse
localizer):
1.
When
equipped
with
DG:
a.
NAV
#1
OBS
Knob
--
SELECT
the localizer
course
to
the
front
course
inbound
(as
a
memory
aid).
b.
REV
Mode
Selector
Button
-
PRESS.
c.
Heading
Selector
Knob
--
ROTATE BUG
to
the
heading
corresponding
to
the
localizer
front
course
bound.
I
S7-18
Revision
4
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