PILOT'S
OPERATING
HANDBOOK
SUPPLEMENT
19
CE¡SSNA
SOOA
AUTOPILOT
(TYPE
AF-39õA)
1.
COURSE
DEVIATION INDICATOR
-
Provides VOR/LOC
navlgation
inputs
to
autopilot for
interoept and tracking
modes.
2.
LOCALIZER
REVERSED
INDICATOR'LIGHT
-
Amborlight,
labelodBO'
illum-
lnates when
BACK CRg button
is
pushed
in
(enga,ged)
and
LOC
frequency
setected.
BC light indloates
courae
lndloator needle
is
reverged on
eeleoted
receiver
(wheD
tured
to
olocalizer
frequenoy).
Thts
ligbtis looatodwithin
the CDI
indica,tor.
3. NON-SLAVED
DIRECTIONAL
GYRO
-
Providee
a
stable
visual indic¿tion
of
aircraft
headiug
to the
pilot
and
provides
heading iuformation
to
the
a,utopilot
for
heading
intercept
and hold.
4. HEADING
BUGI
-
Moved
by HDG knob
to sel€ct deslr€d
heading.
5. LUBBER
LINE
-
Indicatss
aircr&ft
heeding on oompaas
ca,rd
(6).
6. COMPASS CARD
-
Rotatee
to display
heading
of airplane
with
reference
to
lubber line
(ã).
7. HEADING SELECTOF,KNOB
(HDG) -
When
push€d
in'
theheadingbug(4)mav
be
positioned to tho dosired
magrretic
headiag by roteting
the HDG
selector
knob.
Also used to
select VOH,
or
LOC course.
8.
GYRO
ADJUSTMENT
KNOB
(PUSH)
-
When
pushed
in, allows
the
pilot
to
ma,nually
rota,te
tho compass
card
(6)
to coffespoDd
with
the
magnetic
heeding
indicated by
the compass.
The compass card
must be
ma,nua,lly reset
perfodically
to compensate
for
precessional
errors
in the
gyro.
9. TURN
COORDINATOF,
-
Senses
roll and
yaw
for wings leveling
a,nd command
turn functions.
10. HDG SEL
PUSHBUTTON
-
Aircraft will
turn to and
hold hoading selected
by
the
heading
"bug"
on the directional
gyro.
11. NAV
INT PUSHBUTTON
-
When heading
"bug"
on
DG is sot to selected
course'
aircraft
will turn
to and intercopt selected VOR
or
LOC coureo'
12.
NAV TRK PUSHBUTTON
-
Whsn heading
"bug" on DG i6 set to selected
course'
aircraft will
track solected
VOR
or
LOC couree.
13.
HI SENS PUSHBUTTON
-
During
NAV INT
or NAV TRK oporation'
this
high
sensitivity
sotting incr€a,ses autopilot
response
to NAV signal
to
provide
more
precise
operation
during localizer approach, In
low-sonsitivity
position
(push-
button out), response to NAV slgnal
is
dampened
for
smoother
tra,cking of
enroute
VOR
radials; it also smooths out effect
of
course
scalloping
during
NAV opera-
tion.
14. BACK CRS PUSHBUTTON - Used with
LOC opers,tion
only. With
A/P switch
OFF or ON, and
when na,viga,tion
roceiver
selected by NAV
switch
is set
to
a
localizer frequoncy, it rever€os normal
localizer needle
indiaation
(CDI)
and
câuses localizer
revorsed
(BC)
light to illuminate. With
A/P switch
ON,
rev€rses
Iocalizer signal
to autopilot.
Figure
1.
Cessna 3004 Autopilot, Operating
Controls
and Indicators
(Sheet
2 of 3)
3
30
May 1980
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