Autopilot; Autopilot Procedures; Before Takeoff And Landing; Inflight Wings Leveling - Cessna 172 P Pilot Operating Handbook

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AUTOPILOT

GENERAL INFORMATION
The installed autopilot is a single-
axis (aileron control) autopilot
with an additional altitude hold
and glide slope hold function.
Roll and yaw motions of the
airplane are sensed by the turn
coordinator gyro. Deviation from
the selected heading are sensed
by the directional gyro. The
computer-amplifier electronically
c o m p u t e s t h e n e c e s s a r y
correction and signals the
actuator to move the ailerons to
maintain the airplane in the
commanded lateral attitude or
heading.
BUTTONS
ON/OFF
The autopilot can be activated
via the on/off switch located to
the left of the large center knob.
The switch will turn to the off-
position when the battery is
switched off.
HDG SEL
By engaging this button the
airplane will turn to and maintain

AUTOPILOT PROCEDURES

BEFORE TAKE-OFF AND LANDING
[ 1 ] A/P on /off s w i t c h

INFLIGHT WINGS LEVELING

[ 1 ] R ud d e r Tri m
[ 2 ] A/P t urn k n ob
[ 3 ] A/P on /off s w i t c h
| SUPP |
t h e h e a d i n g
selected via the
b u g o n t h e
d i r e c t i o n a l
indicator.
NAV TRK
By engaging this
button the airplane will hold a
radial selected on NAV1. It is
possible to engage both HDG SEL
and NAV TRK simultanously. HDG
SEL is given priority until a VOR
radial is intercepted, at which
point the HDG SEL button will
disengage and the aircraft will
turn to and track the radial. This
mode is generally unavailable if
an active frequency is not
selected.
HI SENS
By depressing this button the
aircraft will track a localizer
frontcourse and also the glide
slope.
BCK CRS
This mode permits tracking of
the back course localizer.
generally unavailable if an active
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SUPPLEMENTS
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frequency is not selected.
CENTER BANK KNOB
The center knob provides variable
aileron control to execute a
standard rate turn. In the default
state, the knob is off (pushed in).
Clicking on the center of the knob
will pull it in the on position,
engaging the wing leveler.
With the knob pulled out moving
it into the right position the
aircraft will enter a standard rate
turn to the right. Moving it into
the left position the aircraft will
enter a standard rate turn to the
left. Re-centering the knob from
either the left or right position
will re-engage the wing leveler.