Cessna 172R - Page 443

CESSNA
MODEL
172R
SECTION
9
-
SUPPLEMENTS
SUPPLEMENT
15
-
FAA
APPROVED
3.
Note
that
the
emergency
procedure
for
any
malfunction
is
essentially
the
same:
immediately
grasp
the control
wheel
and
regain
airplane
control while
pressing
and
holding
the
A/P
DISC/TRIM
INT
switch
down,
and retrim the
airplane
as
needed.
After
these
steps
have been
accomplished
secure
the
autopilot
electric
trim
system
by pulling
the
autopilot
(AUTO PILOT)
circuit
breaker.
As
with
any
other
airplane
emergency
procedure,
it
is
important
that
the
4
steps
of
the
emergency
procedure
located
on
Page
15
be
committed
to
memory.
4.
The
AVIONICS
MASTER
switch
may
be used
to
remove
all
electric
power
from
the
Autopilot
and
Electric
Trim
systems
while
the
circuit
breaker
is
located
and
pulled.
Return
the
AVIONICS
MASTER
switch
to
the
ON
position
as
soon as
possible.
With
the
AVIONICS
MASTER
switch
off,
all avionics
and
autopilot equipment
will
be
inoperable.
5.
It
is
important
that
all
portions
of
the
autopilot
and electric
trim
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
WARNING
DO NOT
RESET
AUTOPILOT CIRCUIT
BREAKER
FOLLOWING
AN
AUTOPILOT/AUTOTRIM
OR
MANUAL
ELECTRIC
TRIM
MALFUNCTION
UNTIL
THE
CAUSE
FOR
THE
MALFUNCTION
HAS
BEEN
CORRECTED.
P
rA
flashing
j
auto
trim
annunciation
on
the
face
of
the
autopilot
indicates
a
failure
of
the
auto
trim
function
to
relieve
pitch
servo
loading
in
a
timely
manner.
This condition
should be
temporary.
1.
FLASHING
?
ANNUNCIATION
-
OBSERVE
aircraft
pitch
behavior.
If
pitch
behavior is
satisfactory,
wait
5-10
seconds
for
the annunciation
to
stop.
Original
Issue
S15-17