Textron Cessna 172R - Page 454

SECTION
9
-
SUPPLEMENTS
SUPPLEMENT
15
-
FAA
APPROVED
CESSNA
MODEL
172R
5.
HEADING
HOLD:
a.
Heading
Selector
Knob
--
SET
BUG
to
desired
heading.
b.
HDG
Mode
Selector
Button
--
PRESS.
Note
HDG
mode
annunciator
ON.
Autopilot
will
automatically
turn
the
aircraft
to
the
selected
heading.
NOTE
Aircraft
heading
may
change
in
ROL
mode
due
to
turbulence.
c.
Heading
Selector
Knob
--
MOVE
BUG
to
the desired
heading.
Autopilot
will
automatically
turn
the
aircraft
to
the
new
selected
heading.
6.
NAV
COUPLING:
a.
When
equipped
with
DG:
1)
OBS
Knob
--
SELECT
desired
course.
2)
NAV
Mode
Selector
Button
-
PRESS.
Note
NAVARM
annunciated.
3)
Heading
Selector
Knob
--
ROTATE
BUG
to
agree
with
OBS
course.
NOTE
When
NAV
is
selected,
the
autopilot
will
flash HDG for
5
seconds
to
remind
the
pilot
to
reset
the
HDG
bug
to
the
OBS
course.
IF
HDG
mode
was
in
use
at
the
time
of
NAV
button
selection,
a
45°
intercept
angle
will
then be
automatically
established based
on
the
position
of
the
bug.
S
15-26
Original
Issue
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