Cessna 172P - Page 299

PILOT'S OPER,ATING
HANDBOOK
SUPPLEMENT
14
CESSNA'
2OOA AUTOPILOT
(TYPE
AF-2958)
1, COURSE
DEVIATION
INDICATOR
-
Provides VOR/LOC
navigation
inputs
to
a,utopilot
for intercept
and tracking
modes;
2. LOCALIZER
REVER SED
INDICATOR
LIGHT
- Amber light,
tabeled
BC,
illum-
inates
when BACK CnS
button
is
puehed
in
(engaged) and LOC
frequency
selected.
BC
light, indicetos course
indicator
needle is
revorsed
on selected
receiver
(when
iurned
to a
localizer froquency).
This light
is
locatod
within
the
CDI
indicator.
3. TUB,N COORDINATOR
-
Senses
roll and
yaw
for wings
leveling
and command
turn
functions.
4. DIR
HOLD
PUSHBUTTON
-
Selects
direction
hold mode.
Airplane
holdS
direc-
tion it is flying
at time button
is
pushed.
5.
NAV
CAPT
PUSHBUTTON
-
Selecte
NAV
oapture
mode.
when
parallel to
desired
courae,
the airplane
will tun
to a
pre'desoribed
intercept
angle
and
capturo
solected
VOII
or LOC course.
6. NAV
TRK PUSHBUTTON
-
S€lêcte
NAV tra,ck
modo. Airplane
tracks
selected
VOR
or LOC course.
7,
HISENSPUSHBUTTON
-
DuringNAVCAPTorNAVl'RKoperetion,
thishigh
sensitivity
setting
increases autopilot response
to
NAV
signal to
provide
more
plecise
operation during
localizer
e,pproach, In
low sensitivity
position (push-
Ùutton out),
response to NAV signal
is dampened
for smoother
tracking of
enroute
VOR
radials; it also smooths
out offeot of course
scalloping
during NAV
opera-
tion.
8. BACK CRS
PUSHBUTTON
-
Used
with LOC
operation
only.
With A/P
switch
OFF
or ON, and
when navigation
receiver selected
by
NAV switch
is set
to a
Iooalizer
frequency,
it reverses normal localizer
needle
indication
(CDI)
a,nd
causes localizer
reversed
(BC)
light
to illuminate. With
A/P switch
ON,
reverses
loca,lizer
signal
to autopilot.
9.
ACTUATOR -
Thetorquomotorintheactuatorcausestheaileronstomovein
the
comma,nded direction.
10. NAV SIUITCH
-
Selects
NAV
1 or
NAV 2 na,vige,tion
reoeivor.
11. PULL
TURN KNOB
-
lVhen
pulled
out and centered
in detent,
airplane
will fly
wings-lovel;
when
turnod
to
th@
right
(R),
the airplane
will execute
& right'
sta,ndard
rate turnt when turned to
the left
(L),
the
airplane will
execute
a left,
standard rate
turn,
When
contered in detent and
pushed
in, the
operating
mode
selocted by a
pushbutton
is engaged.
12. TF,IM
- Used to trim
a,utopilot to compensato for minor
varietions in aircraft
trim
or
weight distribution.
(For
proper
operation,
the aircraft's
rudder
trim,
if
so
equipped, must
be manually trimmed bofore the
autopilot
is
engaged)
13. A/P SWITCH
- Turns
autopilot ON
or OFF.
Figure
1.
Cessna 2004 Autopilot,
Operating Controls
a,nd Indicators
(Sheet
2 of 2)
3
30 May 1980