BendixKing KFC 500 - Manual (Page 9)

8
KMS 540 Flight Director Mode Select Panel
a new altitude in Altitude Select,
does not affect active tracking modes
such as Heading or Vertical Speed
Hold. It is often useful to engage a
separate mode to provide flight guid-
ance to the capture point for a
course or altitude selected in an Arm
mode. The Flight Control System
will transition automatically to capture
the armed mode, cancelling the pre-
vious selection. Examples of this
operation are described in the
Operational Examples section of this
guide.
To cancel a flight director mode
engaged in either capture or tracking
operations, either select an alternate
tracking mode or press the engaged
mode’s pushbutton on the mode
select panel. The latter method also
cancels modes while in their Arm
phases. Go-Around is an exception.
The collective-mounted pushbutton
provides the engage function only.
When the flight director is operat-
ing with no horizontal or vertical
mode selected, the KFC 500 auto-
matically engages in Heading Hold
and Pitch Attitude Hold. These
default modes provide basic flight
stability and serve as safety backups
in the event that the flight computer
cancels an active mode due to loss
of required navigation signal or sys-
tem malfunction. Engaging the
KFC 500 in any tracking mode auto-
matically cancels the corresponding
default mode for that particular axis.
Basic Flight Director Mode
Depressing the FD button on the
Mode Select Panel will activate the
basic Flight Director. Pitch Attitude
Modes of Operation
The KMS 540 Mode Select Panel
provides control and annunciation of
the KFC 500’s Flight Director,
Autopilot, and Yaw Damper modes.
Illumination of the annunciator lamps
on the mode controller is adjusted
automatically by a photocell located
on the face of the unit. To activate
flight director or autopilot modes
using the Mode Select Panel, press
the desired pushbutton. The corre-
sponding mode lamp above the
pushbutton will illuminate and the
mode annunciation on the Electronic
Attitude Director Indicator, EADI, will
appear. Alternatively, to deactivate a
flight director or autopilot mode when
activated, depress the respective
pushbutton.
The KFC 500 will engage in only
one horizontal and one vertical track-
ing mode at a time. Flight director
modes engaged in initial, arming
sequences, however, do not conflict
with tracking operations in other
modes. For example, selecting a
new course in the Nav Arm mode, or
ı
APR HDG
ALT
BL
IAS
AP FD
NAV
VS
SCAS
Normal Operation