Cessna 172R Operating Handbook page 442

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SECTION 9 SUPPLEMENTS
SUPPLEMENT 15
AMPLIFIED EMERGENCY PROCEDURES
The
following paragraphs
information for the purpose of providing the pilot
complete understanding of the recommended course of action for~
an emergency
1. An autopilot
uncommanded deviation in the airplane flight path or when
there is abnormal control wheel or trim wheel motion. In some
cases, and especially for autopilot trim, there may be little
no airplane motion,
(airplane's annunciator panel) may illuminate and
may sound.
The primary
trim malfunction, or
autopilot, is in maintaining control of the airplane. Immediately
grasp the control wheel and press and hold down the A/P
DISC/TRIM INT switch throughout the recovery. Manipulate
the controls as required
airplane within all of
should be used manually as needed
Locate and pull the
right hand circuit breaker panel to completely disable the
autopilot
A manual electric trim malfunction may be recognized by
2.
illumination of the red PITCH TRIM annunciator, accompanied
by an alert
autopilot OFF, without pilot actuation of the manual electric
trim switches.
concern following a manual electric trim malfunction is
maintaining control of the airplane. Grasp the control wheel
firmly and
switch. Locate and pull the AUTO PILOT circuit breaker on
the right hand breaker panel.
S15-16
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FAA APPROVED
are
situation.
or autotrim
yet
concern in
to
its operating limitations. Elevator trim
AUTO PILOT circuit breaker on the
system.
or by unusual trim wheel motions with the
tone,
with an autopilot
As
press and hold down the A/P DISC/TRIM INT
presented to supply additional
malfunction occurs when there is an
the red PITCH TRIM annunciator
reacting to an
an automatic disconnect
maintain operation of the
to safely
relieve control forces.
to
malfunction, the
CESSNA
MODEL 172R
with a more
an alert
autopilot or autopilot
of the
Original Issue
to
tone
first