Textron Cessna 172R - Page 447

CESSNA
MODEL
172R
SECTION
9
-
SUPPLEMENTS
SUPPLEMENT
15
-
FAA
APPROVED
NOTE
Upon
applying
power
to
the
autopilot,
the
red
P
warning
on
the
face of
the
autopilot
may
illuminate
indicating
that
the
pitch
axis
cannot
be
engaged.
This condition
should
be
temporary,
lasting
approximately
30
seconds. The
P
will
extinguish
and
normal
operation
will
be available.
A
WARNING
IF
PITCH
TRIM
LIGHT
STAYS
ON,
THEN
THE
AUTOTRIM
DID
NOT
PASS
PREFLIGHT
TEST.
THE
AUTOPILOT CIRCUIT
BREAKER
MUST
BE
PULLED.
MANUAL
ELECTRIC
TRIM AND
AUTO¬
PILOT
ARE
INOPERATIVE.
3.
MANUAL
ELECTRIC
TRIM
~
TEST
as
follows:
a.
LH
SWITCH
-
PUSH
FORWARD
to
DN
position
and
hold.
OBSERVE NO MOVEMENT
of
Elevator
Trim
Wheel.
Release switch
to
Center
OFF
Position.
NOTE
If
movement
of
the
elevator
trim
wheel is observed
during
a
check
of
either
LH
or
RH
Switch,
the
manual electric
trim
system
has
malfunctioned.
The
flight
may
be continued
if
the
AUTOPILOT
Circuit
Breaker
is
pulled
to
the
OFF
position
and
secured
until
repairs
can
be made.
b.
LH
SWITCH
--
PULL
AFT
to
UP
position
and
hold.
OBSERVE NO
MOVEMENT
of
the Elevator
Trim
Wheel.
Release
switch
to center
OFF
position.
c.
RH
SWITCH
-
PUSH
FORWARD
to
DN
position
and
hold
for
5
seconds.
OBSERVE NO
MOVEMENT
of
Elevator
Trim
Wheel.
Verify
red
"P R"
light
above
AP
button. Release
switch
to
center
OFF
position.
(Continued
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Page)
Revision
1
S15-20A
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