Textron Cessna 172R - Page 457

CESSNA
MODEL
172R
SECTION
9
-
SUPPLEMENTS
SUPPLEMENT
15
-
FAA
APPROVED
b.
When
equipped
with
HSI:
1)
BARO
Setting (if installed)
-
CHECK.
2)
Course
Bearing
Pointer
--
SET
to
desired
course.
3)
Heading
Selector
Knob
--
SET
BUG
to
provide
desired
intercept
angle.
4)
APR
Mode
Selector
Button
--
PRESS.
a)
If
the D-Bar is
greater
than
2
to
3
dots
from
center,
I
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.
b)
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.
5)
Airspeed
--
MAINTAIN
90
KIAS
minimum
during
coupled
autopilot approaches
(recommended).
8.
BACK
COURSE
(REV)
APPROACH
COUPLING
(i.e.,
reverse
localizer):
a.
When
equipped
with
DG:
1)
BARO
setting
(if installed)
-
CHECK.
2)
OBS
Knob
-
SELECT
the localizer
course
to
the
front
course
inbound
(as
a
memory
aid).
3)
REV
Mode
Selector
Button
--
PRESS.
4)
Heading
Selector
Knob
--
ROTATE
BUG
to
the
heading
corresponding
to
the
localizer
front
course
inbound.
Revision
1
S
15-29
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