Honeywell KAP 140 Manual page 70

Two Axis/Altitude Preselect Operations
5. NAVIGATION (NAV) MODE
SELECTOR BUTTON - When
pushed, will arm the navigation
mode. The mode provides automatic
beam capture and tracking of VOR,
LOC or GPS as selected for presen-
tation on the HSI or CDI. NAV mode
is recommended for enroute naviga-
tion tracking. NAV mode may also
be used for front course LOC track-
ing when GS tracking 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 alti-
tude is the altitude at the moment
the ALT button is pressed. If the ALT
button is pressed with an established
VS rate present, there will be altitude
overshoot (approximately 10% of the
VS rate), with the airplane returned
positively to the reference altitude.
This button will engage the autopilot
in units with software prior to soft-
ware version 03/01.
84
KAP 140 AUTOPILOT SYSTEM
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, the initial button stroke will
bring up the commanded vertical
speed in the display. Subsequent
immediate 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.
(Note that the altitude hold reference
is not displayed. The display will
continue to show the altitude alerter
reference.)
10. ROTARY KNOBS - Used to set
the altitude alerter reference altitude;
or may be used immediately after
pressing the BARO button, to adjust
the autopilot baro setting to match
that of the airplane's altimeter when
manual adjustment is required. (In
some installations the baro setting is
automatically synced to that of the
altimeter.)
11. BARO SET (BARO) BUTTON -
When pushed and released, will
change the display from the altitude
alerter selected altitude to the baro
setting display (either IN HG or HPA)
for 3 seconds. If pushed and held for
2 seconds, will change the baro set-
ting display from IN HG to HPA or
Rev. 1
Apr/02