Textron Cessna 172R - Page 458

SECTION
9
-
SUPPLEMENTS
SUPPLEMENT
15
-
FAA
APPROVED
CESSNA
MODEL
172R
NOTE
When
REV
is
selected,
the
autopilot
will
flash HDG for
5
seconds
to
remind the
pilot
to reset
the
HDG
bug
to
the
localizer
FRONT COURSE INBOUND
heading.
If
heading
mode
was
in
use
at
the time
of
REV
button
selection,
a
45°
intercept
angle
will
then be
automatically
established
based
on
the
position
of
the
bug.
NOTE
I
I
All
angle
intercepts compatible
with
radar
vectors
may
be
accomplished
by selecting
ROL
mode
PRIOR
to
pressing
the
REV
button. The
HDG
bug
must
still be
positioned
to
the localizer
FRONT
COURSE
INBOUND
heading
to
provide
course
datum
to
the
autopilot
when
using
a
DG.
a)
If
the
CDI
needle 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
CDI
needle 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.
b.
When
equipped
with
HSI:
1)
BARO
Setting (if installed)
-
CHECK.
2)
Course
Bearing
pointer
--
SET
to
the
ILS
front
course
inbound
heading.
3)
Heading
Selector
Knob
--
SET
BUG
to
provide
desired
intercept
angle
and
engage
HDG
mode.
4)
REV
Mode
Selector
Button
--
PRESS.
S15-30
Revision
1
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