Cessna 172R, Operating Handbook

Page: 451 / 500

CESSNA
MODEL
172R
SECTION 9
-
SUPPLEMENTS
SUPPLEMENT 15
-
FAA APPROVED
NOTE
Avoid autopilot
engagement
into a climb condition that
either
cannot
be maintained, or is on the performance limits
of the airplane for its power and weight configuration.
c. AP Button
--
PRESS*, or PRESS and HOLD**. Note ROL
and
VS
annunciator
on.
If
no other modes are selected the
autopilot will
operate
in the ROL and VS modes.
A
WARNING
WHEN OPERATING AT OR NEAR THE BEST
RATE OF CLIMB AIRSPEED, AT CLIMB POWER
SETTINGS, AND USING VERTICAL SPEED (VS)
MODE, CONTINUED OPERATION IN VERTICAL
SPEED MODE CAN RESULT IN AN
AIRPLANE
STALL. IF NECESSARY, DISCONNECT THE
AUTO PILOT AND RETURN THE AIRPLANE TO A
STABILIZED CLIMB PRIOR TO RE-ENGAGMENT.
A
WARNING
WHEN OPERATING AT OR NEAR THE MAXIMUM
AUTOPILOT SPEED, IT WILL BE NECESSARY TO
REDUCE POWER IN ORDER
TO
MAINTAIN THE
DESIRED RATE OF DESCENT AND NOT
EXCEED THE MAXIMUM AUTOPILOT SPEED.
A
WARNING
DO NOT HELP THE AUTOPILOT OR HAND-FLY
THE AIRPLANE
WITH THE
AUTOPILOT
ENGAGED AS THE AUTOPILOT WILL RUN THE
PITCH TRIM TO OPPOSE CONTROL WHEEL
MOVEMENT. A MISTRIM OF
THE
AIRPLANE,
WITH ACCOMPANYING LARGE ELEVATOR
CONTROL FORCES, MAY RESULT IF THE PILOT
MANIPULATES THE CONTROL WHEEL
MANUALLY WHILE THE AUTOPILOT IS
ENGAGED.
* Airplane serials 17280831 thru 17281118
not
incorporating!
Honeywell Service Bulletin KC140-M1.
** Airplane serials 17280831 thru 17281118
incorporating!
Honeywell Service
Bulletin
KC140-M1, and airplane serials
17281119
and on.
Revision 2 S15-23