Textron Cessna 172R - Page 442

SECTION
9
-
SUPPLEMENTS
SUPPLEMENT
15
-
FAA
APPROVED
CESSNA
MODEL
172R
AMPLIFIED
EMERGENCY
PROCEDURES
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’s
annunciator
panel)
may
illuminate and
an
alert
tone
may
sound.
The
primary
concern
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
A/P
DISC/TRIM
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
A/P
DISC/TRIM
INT
switch. Locate
and
pull
the
AUTO PILOT
circuit breaker
on
the
right
hand breaker
panel.
S15-16
Original
Issue
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