Approach (Apr) Mode Selector Button; Back Course Approach (Rev) Mode Selector Button; Heading Select Knob (Hdg); Autopilot Disconnect (A/P Disc) Switch - Cessna 172R Operating Handbook

CESSNA
MODEL 172R
4. NAVIGATION (NAV) MODE SELECTOR BUTTON
pushed, will select the Navigation mode. This mode provides
automatic beam
signals as selected for presentation on the NAV#1 CDI or HSI
(if installed).

5. APPROACH (APR) MODE SELECTOR BUTTON

pushed, will
automatic beam
signals as selected for presentation on the NAV #1 CDI or HSI
(if installed). The
is recommended for instrument approaches.
6. BACK COURSE APPROACH (REV) MODE SELECTOR
BUTTON
navigation receiver is tuned
pushed, it will select the Back Course (BC) approach mode.
This mode functions indentically
that the autopilot response

7. HEADING SELECT KNOB (HDG)

pointer ("bug") on the compass card. Note that the position of
the heading bug also provides course datum
when tracking in
addition
to
8. OMNI BEARING SELECT KNOB (OBS)
course radial
HDG bug
and track the selected
capture

9. AUTOPILOT DISCONNECT (A/P DISC) SWITCH

depressed will disengage the autopilot.
disconnect will be annunciated
accompanied by a flashing "AP" displayed on the
tone
autopilot
computer.
10. AUTOPILOT CIRCUIT BREAKER
supplying 28 VDC to the KAP 140 system.
Figure
1. Bendix/King
Revision
4
and tracking of VOR, LOC, or GPS
capture
select the Approach mode.
and tracking of VOR, LOC, or GPS
capture
tracking sensitivity of the APR mode
greater
This
-- button is active only when the coupled
NAV, APR,
its more intuitive use in the HDG mode.
be tracked by the autopilot. (Note that the
to
also be positioned to the proper course
must
KAP 140 Autopilot, Operating Controls and
Indicators (Sheet
SECTION 9
SUPPLEMENT 7
This mode provides
LOC/ILS frequency. When
a
to
the approach mode
to
LOC signals is reversed.
to
Positions the
-
or REV (BC) modes. This is in
-
radial).
a continuous two-second
by
A 5-amp circuit breaker
-
of 3)
3
SUPPLEMENTS
-
FAA
APPROVED
-
When
-
When
-
except
heading
the autopilot
to
Selects the desired
When
-
The autopilot
S7-9
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to