BendixKing KAP 140 - Manual (Page 53)

Two Axis Operation
56 KAP 140 AUTOPILOT SYSTEM
Rev. 1
Apr/02
5. NAVIGATION (NAV) MODE
SELECTOR BUTTON - When
pushed, will arm the navigation
mode. The mode provides auto-
matic beam capture and tracking of
VOR, LOC or GPS as selected for
presentation on the HSI or CDI.
NAV mode is recommended for
enroute navigation tracking. NAV
mode may also be used for front
course LOC tracking when GS track-
ing is not desired.
6. APPROACH (APR) MODE
SELECTOR BUTTON - When
pushed, will arm the Approach
mode. This mode provides auto-
matic beam capture and tracking of
VOR, GPS, LOC, and Glideslope
(GS) on an ILS, as selected for pre-
sentation on the HSI or CDI. APR
mode is recommended for instru-
ment approaches.
7. BACK COURSE APPROACH
(REV) MODE SELECTOR BUTTON
- When pushed, will arm the Back
Course approach mode. This mode
functions similarly to the approach
mode except that the autopilot
response to LOC signals is
reversed, and GS is disabled.
8. ALTITUDE HOLD (ALT) MODE
SELECT BUTTON - When pushed,
will select the Altitude Hold mode.
This mode provides tracking of the
reference altitude. The reference
altitude is the altitude at the moment
the ALT button is pressed. If the
ALT button is pressed with an estab-
lished VS rate present, there will be
altitude overshoot (approximately
10% of the VS rate), with the air-
plane returned positively to the refer-
ence altitude. This button will
engage the autopilot in units with
software prior to software version
03/01.
9. VERTICAL TRIM (UP/DN) BUT-
TONS - The action of these buttons
is dependent upon the vertical mode
present when pressed. If VS mode
is active, button strokes will incre-
ment the vertical speed commanded
either up or down at the rate of 100
ft/min per button press, or at the rate
of approximately 300 ft/min per sec-
ond if held continuously. If ALT
mode is active, incremental button
strokes will move the altitude hold
reference altitude either up or down
at 20 feet per press, or if held contin-
uously will command the airplane up
or down at the rate of 500 ft/min,
synchronizing the altitude hold refer-
ence to the actual airplane altitude
upon button release.
10. VERTICAL SPEED DISPLAY -
Displays the commanded vertical
speed in VS mode.
11. PITCH TRIM (PT) ANNUNCIA-
TION - A flashing PT with arrows
indicates the direction of required
pitch trim. A solid PT without an
arrow head is an indication of a pitch
trim fault. During manual electric trim
operation (autopilot disengaged),
detection of a stuck MET switch will
be indicated by a solid PT. When the
fault is corrected, the annunciation
will extinguish.