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pilot or the copilot to maintain sufficient lateral and longitudinal control in the event of a
control jam. The rudder control is equipped with an anti-jam mechanism that permit both
pilots to maintain sufficient directional control, however, additional force is required to obtain
surface travel.
In the event of a total electrical power failure, the primary flight controls will remain
hydraulically powered ACMP 3B, which will be powered ny the ADG in an emergency.
The secondary flight controls include:
S slats and flaps,
S ground spoilers
S aileron and rudder trim
S horizontal stabilizer trim
S multifunctional spoilers.
NOTE
Themultifunctional spoilers consists of two spoilers on
each wing. The outboard spoilers are referred to as
the SPOILERONS and the inboard spoilers are
referred to as the FLIGHT SPOILERS.
Lateral (roll) control of the aircraft is provided by the ailerons, assisted by the multifunctional
spoilers.
Directional (yaw) control of the aircraft is provided by the rudder, assisted by yaw dampers.
Vol. 1 11--10--2
FLIGHT CONTROLS
Introduction REV 3, May 03/05
Flight Crew Operating Manual
CSP C--013--067
Longitudinal (pitch) control of the aircraft is provided by the elevators, assisted by a
moveable horizontal stabilizer.
The spoiler control system provides the aircraft with ground lift dumping, roll assist,
proportional lift dump and speed reduction in decent for landing. Multifunctional spoilers
assist the ailerons for turn coordination and are also used in the ground lift dumping
function. The ground spoilers only deploy on the ground as part of the ground lift dumping
function.
There are two spoiler/stabilizer control units (SSCUs) that automatically control operation of
the spoilers, horizontal stabilizer trim, pitch feel control and rudder travel limiting.
Vol. 1 11--10--3
FLIGHT CONTROLS
Introduction REV 3, May 03/05
Flight Crew Operating Manual
CSP C--013--067
Flight Controls --- General
Figure 11---10---1
MULTI--FUNCTION
SPOILERS
AILERON
GROUND
SPOILERS
OUTBOARD
FLAP
INBOARD
FLAP
SLATS
HORIZONTAL
STABILIZER
ELEVATOR
RUDDER
Vol. 1 11--10--4
FLIGHT CONTROLS
Introduction REV 3, May 03/05
Flight Crew Operating Manual
CSP C--013--067
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Vol. 1 11--20--1
FLIGHT CONTROLS
Ailerons REV 3, May 03/05
Flight Crew Operating Manual
CSP C--013--067
1. AILERONS
Lateral control of the aircraft is provided by the ailerons with assist from the multifunction
spoilers.
The aileron control systems consist of two control circuits. Under normal conditions, the two
systems are interconnected through a roll disconnect mechanism, and there is simultaneous
movement of both aileron surfaces from either pilot control wheel. The pilot operates the left
aileron system and the copilot operates the right aileron system. Both systems are similar in
operation. The autopilot is connected to the right control system only.
Each aileron is hydraulically powered by two power control units (PCUs) and mechanically
controlled by rotation of either control wheel. The left aileron PCUs are powered by
hydraulic systems 1 and 3 and the right aileron PCUs are powered by hydraulic systems 2
and 3.
Control wheel movement also generate electrical inputs to the spoiler and stabilizer control
units (SSCUs) for roll assist which is provided by the multifunctional spoilers.
Control wheel centering and artificial feel is provided by mechanical feel units. A flutter
damper is attached to each aileron to prevent surface flutter in the event of hydraulic fluid
loss at the PCUs during flight. On the ground, flutter dampers provide gust lock function.
In the event of an aileron control jam, the left and right systems can be mechanically
separated by pulling a roll disconnect handle. The roll disconnect allows limited lateral
control using the unaffected aileron control system and the opposite side spoilerons. Twenty
seconds after pulling the roll disconnect handle, two roll select lights on the glareshield
illuminate. The flight crew must then select the roll priority on the operable side to obtain
control of all spoilerons.
In the event of a PCU runaway, the spoiler and stabilizer control units command the
spoilerons on both sides to respond to control inputs. After the roll disconnect handle is
pulled, the roll priority should be selected.
Vol. 1 11--20--2
FLIGHT CONTROLS
Ailerons REV 3, May 03/05
Flight Crew Operating Manual
CSP C--013--067
Aileron Control General Arrangement
　
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