Textron Cessna 172R - Page 404

SECTION
9
-
SUPPLEMENTS
SUPPLEMENT
7
-
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.
A
WARNING
DO
NOT
ATTEMPT
TO RE-ENGAGE
THE
AUTOPILOT
FOLLOWING
AN
AUTOPILOT
MALFUNCTION
UNTIL
CORRECTIVE
SERVICE
ACTION
HAS
BEEN
PERFORMED ON
THE
SYSTEM.
An
autopilot
malfunction
occurs
when there is
an
uncommanded
deviation
in
the
airplane
flight
path
or
when there
is
abnormal
control wheel
movement.
The main
concern
in
reacting
to
an
autopilot
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
switch
throughout
the
recovery.
Manipulate
the
controls
as
required
to
safely
maintain
operation
of
the
airplane
within
all
of
its
operating
limitations.The
AVIONICS
MASTER
switch
may
be used
as
required
to
remove
all
power
from
the
Autopilot.
With
the
AVIONICS
MASTER
switch
off,
all
flight
instruments
will
remain
operational;
however, communications,
navigation,
and
identification
equipment
will
be
inoperative.
Note that the
emergency
procedure
for
any
malfunction
is
essentially
the
same:
immediately
grasp
the control
wheel
and
regain
airplane
control while
pressing
and
the
holding
the
A/P DISC
switch
down.
It
is
important
that
all
portions
of
the
autopilot
system
are
preflight
tested
prior
to
each
flight
in
accordance
with
the
procedures
published
herein
in
order
to
assure
their
integrity
and continued
safe
operation
during
flight.
A
flashing
mode annunciation
on
the
face of
the
autopilot
is
normally
an
indication
of
mode loss.
S7-12
Revision
4
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