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Pilot’s Operating Manual
Revision A1: Nov, 2002
Hawker 800XP Pro Line 21
Section VII - SAFETY INFORMATION
If an airplane is loaded so that the C.G. is forward of the forward limit it will require additional control
movements for maneuvering the airplane with correspondingly higher control forces. The pilot may have
difficulty during take-off and landing because of the elevator control limits.
If an airplane is loaded aft of the aft C.G. limitation, the pilot will experience a lower level of stability.
Airplane characteristics that indicate a lower stability level are; lower control forces, difficulty in trimming
the airplane, lower control forces for maneuvering with attendant danger of structural overload, decayed
stall characteristics, and a lower level of lateral-directional damping.
Ensure all cargo and baggage is properly secured before take-off. A sudden shift in balance at rotation
can cause controllability problems.
Autopilot
In addition to ensuring compliance with the autopilot manufacturer’s maintenance requirements, all
owner/operators should thoroughly familiarize themselves with the operation, function and procedures
described in the Hawker 800XP Collins Pro Line 21 Avionics System Pilot’s Guide, P/N 523-0780409-
001117. Prior to flight, each pilot must command a full understanding of the methods of engagement
and disengagement of the autopilot system, particularily disengagement.
Test that all buttons, switches and circuit breakers function as described in the Pilot’s Guide. If they do
not function as described, have the system repaired by a qualified service agency. If field service advice
or assistance is necessary, contact Raytheon Aircraft Company, Customer Support Department.
The preflight check must be conducted before every flight. The preflight check assures not only that the
system and all of its features are operating properly, but also that the pilot, before flight, is familiar with
the proper means of engagement and disengagement of the autopilot.
The Pilot’s Guide cautions against trying to override the autopilot system during flight without
disengaging the autopilot because the autopilot will continue to trim the airplane and oppose the pilot’s
actions. This could result in a severe out-of-trim condition. This is a basic feature of all autopilots with
electric trim followup.
Do not try to manually override the autopilot during flight.
WARNING:
IN CASE OF EMERGENCY, YOU CAN OVERPOWER THE AUTOPILOT TO
CORRECT THE ATTITUDE, BUT THE AUTOPILOT AND ELECTRIC TRIM MUST
THEN IMMEDIATELY BE DISENGAGED.
It is often difficult to distinguish an autopilot malfunction from an electric trim system malfunction.
The engagement of the autopilot must be done in accordance with the instructions and procedures
contained in the Pilot’s Guide.
Particular attention must be paid to the autopilot settings prior to engagement. If you attempt to engage
the autopilot when the airplane is out of trim, a large attitude change may occur.
IT IS ESSENTIAL THAT THE PROCEDURES SET FORTH IN THE PILOT’S GUIDE BE FOLLOWED
BEFORE ENGAGING THE AUTOPILOT.
Flutter
Flutter is a phenomenon that can occur when an aerodynamic surface begins vibrating. The energy to
sustain the vibration is derived from airflow over the surface. The amplitude of the vibration can (1)
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