Cessna 172R, Operating Handbook

Page: 434 / 500

SECTION
9
-
SUPPLEMENTS
SUPPLEMENT
15 - FAA
APPROVED
CESSNA
MODEL 172R
KAP 140 WITHOUT ALTITUDE PRESELECT
1. PITCH AXIS (P) ANNUNCIATOR
-
When illuminated,
indicates failure of pitch axis and will either disengage the
autopilot
or
not
allow
engagement
of the pitch axis.
In
turbulent air,
will illuminate during abnormal
vertical/accelerations.
2.
AUTOPILOT ENGAGE/DISENGAGE (AP) BUTTON
-
When
pushed*, or
pressed and held
(approx. 0.25 seconds)**,
engages autopilot if all preflight self-test conditions are
met.
The autopilot will engage in the
basic roll (ROL) mode which
—
functions as a wing leveler and the pitch axis
vertical
speed
(VS) mode.
The
commanded vertical speed will be displayed
in the upper right corner of autopilot display
area.
The
captured VS will be the vertical speed
present at
the
moment
the AP button
is pressed. The button may also be used
to
disengage the autopilot.
3. ROLL AXIS
(R) ANNUNCIATOR
--
When illuminated, indicates
failure of the roll axis and disengages the autopilot.
|*
Airplane serials 17280831 thru 17281118 not incorporating
Honeywell Service Bulletin KC140-M1.
I**
Airplane serials 17280831 thru 17281118 incorporating
Honeywell Service Bulletin
KC140-M1, and
airplane serials
17281119
and on.
Figure
2.
Bendix/King 2-Axis KAP 140 Autopilot, Operating
Controls and Indicators (Sheet 1
of 4)
S15-8
Revision
2