Altitude Alerting And Preselect; Altitude Alerter; Altitude Preselect; Voice Messaging - Honeywell Bendix/King KFC 225 Pilot's Manual

System Operation

Altitude Alerting and Preselect

The Altitude Preselect function allows capturing of a selected altitude and
transferring into altitude hold. Manual input of selected altitude is accom-
plished through the rotary knobs on the faceplate of the KFC 225.
The Altitude Alerting function will visually and aurally announce approaching,
acquiring and deviation from a selected altitude.

Altitude Alerter

The function of the Altitude Alerter is
independent of the autopilot.
1. ALTITUDE SELECT knob -
ROTATE until the selected altitude
is displayed.
ARM VS
YD
G
UP
P R
AP FD HDG NAV APR REV ALT DN
KFC 225
Note: The ALERT annunciation is
illuminated 1000 ft. prior to the
selected altitude, extinguishes 200 ft.
prior to the selected altitude and illu-
minates momentarily when the
selected altitude is reached. Once
the selected altitude is reached, a
flashing ALERT illumination signifies
that the 200 ft. "safe band" has been
exceeded and will remain illumi-
nated until 1000 ft. from the selected
altitude. Associated with the visual
alerting is an aural alert (five short
tones) which occurs 1000 ft. from
the selected altitude upon approach-
ing the altitude and 200 ft. from the
selected altitude on leaving the alti-
tude.
VS
YD ARM
G
UP
P R
AP FD HDG NAV APR REV ALT DN
KFC 225
10
KFC 225 AUTOMATIC FLIGHT CONTROL SYSTEM

Altitude Preselect

1. ALTITUDE SELECT knob -
ROTATE until selected altitude is
displayed. ARM annunciation
occurs automatically upon altitude
selection when the flight director is
engaged.
ARM VS
YD
G
UP
P R
AP
FD HDG NAV APR REV ALT DN
KFC 225
2. Airplane - ESTABLISH selected
vertical speed to intercept the
selected altitude.
ARM VS
YD
G
UP
P R
AP FD HDG NAV APR REV ALT DN
KFC 225
3. Upon altitude capture, ALT
ARM will extinguish and ALT will
be annunciated.
Note: Glideslope coupling (but not
glideslope ARM) will preclude an
altitude capture on an ILS.
ARM VS
YD
G
UP
P R
AP
FD HDG NAV APR REV ALT DN
KFC 225
Rev. 0
Apr/99

Voice Messaging

The following standard voice mes-
sages will be annunciated as condi-
tions warrant:
1. "TRIM IN MOTION, TRIM IN
MOTION..." - Pitch trim running
for more than 5 seconds.
2. "CHECK PITCH TRIM" - An
out of trim condition has existed
for 16 seconds.
a. Airplane Control Wheel -
GRASP FIRMLY, press CWS
and check for an out of pitch trim
condition. Manually retrim as
required.
b. CWS button - RELEASE.
c. AUTOPILOT OPERATION -
CONTINUE if satisfied that the
out of trim condition was tempo-
rary. DISCONTINUE if evidence
indicates a failure of the auto trim
function.
The following optional voice mes-
sages will be annunciated if the sys-
tem is configured for voice messag-
ing:
1. "ALTITUDE" - 1000 feet
before approaching selected alti-
tude.
2. "LEAVING ALTITUDE" - 200
feet away, departing selected alti-
tude.
3. "AUTOPILOT" - Autopilot has
disengaged, either through pilot
action or automatically.
Rev. 0
KFC 225 AUTOMATIC FLIGHT CONTROL SYSTEM
Apr/99
System Operation
11