Textron Cessna 172S Skyhawk SP, Information Manual

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SECTION 9 - SUPPLEMENTS
SUPPLEMENT
15 - FAA APPROVED
CESSNA
MODEL 172S
AMPLIFIED EMERGENCY PROCEDURES
D
The following paragraphs are presented to supply additional
information for the purpose of providing the. pilot with a more
complete understanding of the' recommended course of action for
an emergency situation,
, 1. An autopilot ,or autotrim malfunction occurs when there is an
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 to
no airplane
motion, yet the red PITCH TRIM' annunciator
(airplane annunciator panel) may illuminate and an alert, tone
may sound.
The primary co'ncern in reacting to an autopilot or autopilot
trim
malfunction, or to an automatic disconnect of the
autopilot, is in maintaining control of the airplane. Immediately
grasp the control wheel and press and hold down the NP
DISCITRIM 'INT switch throughout the recovery. Manipulate
the controls as required to safely maintain operation of the
airplane within all of its operating limitations. Elevator -trim
should be used manually as needed to relieve control forces.
Locate and pull the AUTO PILOT circuit breaker on the
right hand circuit breaker panel to completely disable the
autopilot system. .
2. A manual electric' trim malfunction may be recognized by
illumination of the red PITCH TRIM annunciator, accompanied
by an alert tone, or by unusual trim wheel motions with the
autopilot
OFF, without pilot actuation of the manual electric
trim switches. As with an autopilot malfunction, the first
concern following a manual electric trim malfunction is
maintaining control of the airplane. Grasp the' control wheel
firmly and press and hold down the NP DISCITRIM INT
switch. locate and pull the AUTO PilOT circuit breaker on
the right hand breaker panel.
S15-16
Revision 5