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CESSNA
MODEL 172R
SECTION
9
-
SUPPLEMENTS
SUPPLEMENT
15
-
FAA
APPROVED
4.
HEADING
(HDG)
MODE SELECTOR BUTTON
-
When
pushed, will
select the
Heading
mode,
which commands the
airplane
to turn
to
and
maintain
the heading selected
by
the
heading bug
on the Directional
Gyro
or
HSI
(if installed). A
new
heading may
be selected
at
any
time
and
will
result
in
the airplane
turning
to
the
new heading.
The button
can also
be used
to
toggle between
HDG
and
ROL
modes.
For
airplane serials
17280831
thru
17281118
not
incorporating!
Honeywell Service
Bulletin
KC140-M1,
this button
can also be
used
to
engage the autopilot in HDG mode.
5.
NAVIGATION
(NAV)
MODE SELECTOR BUTTON
-
When
pushed, will
select
the
Navigation
mode. This mode provides
automatic
beam
capture
and
tracking
of
VOR,
LOC,
or GPS
signals
as
selected
for
presentation
on the
#1
CDI.
NAV
mode is recommended
for
enroute
navigation tracking.
6.
APPROACH
(APR) MODE
SELECTOR
BUTTON
-
When
pushed, will select the
Approach mode.
This mode
provides
automatic beam
capture
and
tracking of VOR, GPS,
LOC and
Glideslope (GS) on an ILS,
as selected for presentation
on #1
CDI.
APR mode
tracking
sensitivity is recommended
for
instrument
approaches.
7.
BACK COURSE
APPROACH (REV) MODE
BUTTON
-
This
button is active only
when the coupled
navigation
receiver is
tuned
to
a
LOC/ILS
frequency.
When pushed will select the
Back
Course
approach mode. This mode
functions identically
to
the
approach mode
except
that
the autopilot
response
to
LOC
signals
is reversed.
Glideslope
is locked
out
with REV
mode.
8.
ALTITUDE
HOLD (ALT)
MODE SELECT
BUTTON
-
When
pushed, will select the altitude hold mode.
This mode
provides
capture
and
tracking of
the selected altitude.
The
selected
altitude is the airplane altitude
at
the
moment
the
ALT button is pressed.
If
the
ALT
button is
pressed
with
an
established
VS
rate
present,
there
will
be
about
a
10%
(of
VS
rate)
overshoot.
The
airplane will
return
positively
to
the
selected
altitude.
For
airplane serials 17280831
thru
|
17281118
not
incorporating
Honeywell
Service
Bulletin
KC140-M1,
this button
may be used
to
engage the autopilot in
ALT
mode.
Figure
2.
Bendix/King
2-Axis KAP
1
40
Autopilot,
Operating
Controls
and Indicators
(Sheet
2)
Revision
2
S15-9
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