Cessna 172SPHUSR05 Pilot Operating Handbook page 406

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S ECTION 9 SU PPLEM E NTS
S U P PLEM ENT 1 5 - FAA APPROVED
AMPLI FIED EMERG ENCY PROCEDURES
The following paragraphs are presented to supply additional
i nformation for the purpose of providi ng the pilot with a more
complete understanding of the recommended cou rse of action for
an emergency situation.
1 . An autopilot or autotrim m alfunction occurs when there is an
uncommanded deviation i n 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 ann unciator
(
ship's annunciator panel
may sound.
The primary concern i n reacting to an autopilot or autopi lot
trim malfu nction, or to an automatic disconnect of the
autopilot, is i n m aintaining control of the airplane. I mmediately
grasp the control wheel and press and hold down the AlP
DISCITR I M I NT switch throug hout the recovery.
the controls as required to safely maintain operation of the
airplane within all of its operating l i mitations.
should be used manually as needed to relieve control forces.
Locate and pull the AUTO PI LOT circuit breaker on the
right hand circuit breaker panel to completely disable the
autopilot system .
2 . A manual electric trim malfunction may b e recognized by
illumination of the red PITCH TRIM annu nciator, accompanied
by an alert tone, or by un usual trim wheel motions with the
autopilot OFF, without pilot actuation of the manual electric
trim switches.
concern fol lowing a man ual electric trim m alfunction is
maintain ing control of the airplane.
firmly and press and hold down the A/P D ISC/T R I M I NT
switch . Locate and pull the AUTO P I LOT circuit breaker on
the right hand breaker panel.
S 1 5- 1 6
)
may illuminate and an alert tone
As with an autopilot m alfu nction, the first
C ESSNA
MOD EL 1 72S
Manipulate
Elevator trim
Grasp the control wheel
Ori i nal Issue