Cessna 172R, Operating Handbook

Page: 436 / 500

SECTION
9
-
SUPPLEMENTS
SUPPLEMENT
15 - FAA APPROVED
CESSNA
MODEL
172R
9. VERTICAL SPEED (UP/DN) MODE BUTTONS
--
The action
of these buttons depends
on the vertical mode
present
when
pressed. If
VS mode is active
(AP
plus any lateral
mode) and
the UP button is pressed, the
autopilot will modify the
displayed VS command (FPM) in the up direction.
Single
momentary
cycles on
either the UP or DN button
will
increment the VS command
by 100 FPM per cycle.
When
either button is continuously held
in, it will modify the vertical
speed
command
by 300 fpm per second.
If ALT mode is active, pressing
the UP/DN buttons will modify
the captured altitude by 20 feet
per cycle, or if held
continuously will command the airplane up or down
at
the
rate
of 500 FPM, synchronizing the ALT reference
to
the actual
airplane altitude upon button release.
10.
AUTO PILOT CIRCUIT BREAKER
- A 5-amp pull-off circuit
breaker
supplying 28 VDC
to
the KAP 140
system.
11
.
WARN C/B
-
Power
to
the autopilot disconnect horn and the
airplane's annunciator panel (PITCH TRIM).
12.
AUTOPILOT DISCONNECT (A/P DISC/TRIM INT) SWITCH
-
When depressed
will
disengage the autopilot and interrupt
manual electric trim
(MET)
power.
An
autopilot disconnect
will be annunciated by a continuous 2 second
tone
accompanied by flashing "AP" annunciations on the autopilot
computer display.
13. MANUAL ELECTRIC TRIM (MET) SWITCHES
-
When both
switches are pressed in the
same direction the trim
system
will provide pitch trim in the selected direction. Use of manual
electric
trim
during autopilot operation will disengage
the
autopilot.
Figure 2. Bendix/King 2-Axis KAP
140
Autopilot, Operating
Controls
and Indicators
(Sheet 3)
S15-10 Revision 2