User manual

Piper PA-31T Cheyenne X
Aerosoft GmbH 2007
60 61
60 61
KFC250 Autopilot Operation Modes
There are twelve (12) modes of operation that are provided by the KFC
250 system to offer the pilot Flight Director/Autopilot commands in
response to his selection of desired modes on the Mode Controller.
Most of these modes are activated by pushbutton switches on the
Mode Controller. These pushbuttons operate with alternate action.
The first depression of the pushbutton activates a mode; the second
depression cancels it, if it has not already been automatically inactivated.
Annunciation of the mode selected appears on the annunciator panel.
Any operating mode not compatible with a newly selected mode will
be automatically cancelled in favor of the pilot’s latest selection. This
lets the pilot advance along his flight sequence without the inconvenience
of having to manually cancel modes. For example, if in NAV CPLD
mode, selection of Heading will automatically cancel NAV.
The basic mode of system operation
The system will be in the Basic Attitude Reference or „Gyro” mode
with engines running and aircraft „power on,” but no modes selected
(Annunciator Panel blank). This provides indication of aircraft heading
on the Horizontal Situation Indicator, and roll and pitch attitude on the
Flight Command indicator. The FCI Command V-bar is biased out of
view.
FLIGHT DIRECTOR Mode (FD)
The Flight Director mode is activated by depressing the „FD” button
on the Mode Controller. The FCI Command V-bar will appear and
provide the pilot with steering commands to maintain wings level and
the pitch attitude that existed at the time of Flight Director engagement.
If pitch or roll attitude are changed, recycling the FD button will syn-
chronize the Command V-bar to the new situation. If a change only in
the commanded pitch attitude is desired, the Control Wheel Steering
(CWS) button installed on the pilot’s control wheel allows the pilot
to synchronize the Command V-bar (in the FD mode with Autopilot
disengaged) without removing his hand from the control wheel. The
Flight Director can also be activated by direct selection of any specific
mode, which will activate the Command V-bar. Such selection will will
cause the annunciation of both the FD and the appropriate mode. The