Specifications

SECTION III
MODEL 560 INSTRUMENTATION AND AVIONICS
PRIMUS 1000 SYSTEM OPERATION
The Primus 1000 system incorporates a wide variety of capabilities that produces one of the most
precise, flexible and easy to use systems in airplanes today. The flight director and autopilot can be used
independently or together. The airplane may be flown manually, using the guidance provided by the modes
selected on the flight director, or when the autopilot is engaged and coupled to the flight director it will
control the airplane using the commands generated by the flight director computer. Disengagement of the
autopilot will have no effect on the FD modes in operation at the moment of disengagement, except when
using the go-around button, in which case a wings level 10-degree nose up attitude will be commanded and
all other FD modes will be reset. When the autopilot is engaged without any mode selected, manual pitch
and roll commands may be made by means of the turn knob and pitch wheel on the autopilot controller.
Touch control steering (TCS) can be used to maneuver the airplane or to modify the commands to the FD
and AP. If the autopilot is not engaged, the TCS button can be used to synchronize the command bars to
the airplane attitude. If HDG mode has been selected, BANK LIMIT mode may be engaged and the
maximum bank angle will be limited to approximately 14 degrees.
Refer to the Primus-1000 Integrated Avionics System Pilot's Manual (Honeywell Publication Number
A28-1146-134-00 Revision 0 dated April 2000 or later appropriate revision) for system description and
operation of the installation of the Primus 1000 system.
The Primus 1000 system in the Citation V Encore operates through displays of the pilot's (or copilot's)
electronic flight instrument system (EFIS). The systems of autopilot and EFIS are integrated, and
unnecessary system redundancy has thereby been eliminated. The result is an overall simplification over
previous systems, and greatly simplified interface requirements for the flight director function. If a
particular EFIS unit is operational, the flight director will also be operational, and conversely if the EFIS has
failed, the flight director will also be failed. The display is available as a single-cue or a double-cue (cross-
pointer) presentation, the selection of which is made by means of the SC/CP button on the DC-550 Display
Controller. The presentation upon power-up is single-cue. Glideslope and VNAV vertical path information
are presented on the right side of the electronic attitude director indicator (EADI) section of the primary
flight display (PFD). The pertinent command bar(s) of the flight director can be brought into view, when
double cue display is selected, by selecting any mode. If single cue mode is selected, selection of only a
vertical mode will not bring the command bars into view.
The autopilot may be switched to the pilot's flight director (FD 1) or the copilot's flight director (FD 2)
by means of an illuminated selector switch (AP XFER FD 1/AP XFER FD 2) located on the center
instrument panel. This switch determines only which flight director system provides guidance to the
autopilot.
BASIC AUTOPILOT
The basic autopilot, without any inputs from the flight director system, can be used for pitch, roll and
heading hold. The autopilot will hold the pitch attitude existing at the moment of AP engagement and the
pitch attitude existing at the moment of disengagement of a vertical mode.
The autopilot can be engaged in any reasonable attitude; however, unless touch control steering
(TCS) is used in conjunction with autopilot engagement, the autopilot will roll wings level if engaged while
in a bank. If the bank is less than six degrees at engagement, the autopilot will hold the heading indicated
when the autopilot is engaged. If the bank is over six degrees at engagement, it will hold the heading
indicated when the airplane rolls through six degrees of bank on the way to wings level. If a lateral mode is
disengaged, the autopilot will hold the heading existing at the moment of disengagement. If the turn
controller is out of the center detent position, the autopilot will not engage.
I 56OMB-01 Configuration AA 3-39