Cessna 172R, Operating Handbook

Page: 410 / 500

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