Cessna SkyHawk SP 172S NAV III 2005 Pilot Operating Handbook page 357

SECTION 9 - SUPPLEMENTS
SUPPLEMENT 3
NORMAL PROCEDURES
(Continued)
NOTE
CESSNA
MODEL 172S NAV III
Only engage the autopilot during wings-level stable
flight. The autopilot will come on in ROL (wings
leveler) and VS (Vertical Speed) modes. The VS
mode initial rate-of-climb will be the vertical speed at
the time the autopilot is engaged. Do not engage
the autopilot when the airplane cannot hold the
climb rate because of excessive pitch attitude, low
airspeed, low engine power or high airplane weight.
Do not engage the autopilot when the performance
or operation of the autopilot or airplane will not obey
the limitations.
3. AP Button - PUSH and HOLD. Make sure that ROL and
VS are shown on the face of the autopilot. If no selection
of other operating modes is made, the autopilot will operate
in ROL and VS modes.
NOTE
When operating in ROL mode, turbulence may result
in changes to airplane heading. ROL mode only
works to keep the wings level.
4. Make HOG or NAV mode selection as applicable (optional).
WARNING
• WHEN OPERATING THE AUTOPILOT IN VS
MODE WITH POWER SET FOR CLIMB AND
AIRSPEED AT OR NEAR BEST RATE-OF-
CLIMB, CONTINUED OPERATION IN VS
MODE CAN RESULT IN A STALL. IF
NECESSARY, DISENGAGE THE AUTOPILOT
AND RETURN THE AIRPLANE TO STABLE
CLIMB BEFORE ENGAGING THE AUTOPILOT
AGAIN.
(Continued Next Page)
S3-28 U.S.
FAA APPROVED
172SPHAUS-S3-00