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GX_10_004
Multifunction
Spoilers
(4 per wing)
Slats
(4 per wing)
Ground
Spoilers
(2 per wing)
Flaps
(3 per wing)
Stabilizer
For Training Purposes Only
Sept 04
10-5
P I LOT T R A I N I N G GU I D E
FLIGHT CONTROLS
Longitudinal trim is achieved by inputs from auto pilot, mach trim and trim switches
on the pilots’ control wheels. Trim operation is through a dual electric motor and
screw jack assembly at the horizontal stabilizer.
Aileron, elevator and pitch trim indications are as shown on the EICAS display.
HIGH LIFT DEVICES
The high lift devices consist of leading edge slats and trailing edge fowler flaps. The
flap/slat systems are mechanically independent. Each system contains ballscrew
actuators, linked through a rigid drive line to dual electric motors, contained within a
central power-drive unit.
Electrically there are two independent channels for both flaps and slats systems. An
integrated flap/slat selector lever is located in the flight compartment, on the center
pedestal.
System control provides protection against asymmetry and uncommanded movement.
Interface to EICAS and central maintenance are provided for system failure detection
and isolation.
STALL PROTECTION
Two subsystems, stall warning and a stick pusher system comprise the stall protection
system.
P I LOT T R A I N I N G GU I D E
FLIGHT CONTROLS
10-6 For Training Purposes Only
Sept 04
HYDRAULIC POWER DISTRIBUTION
The primary and secondary flight controls, powered by the hydraulic systems, are
listed as follows:
INDICATING SYSTEM
The flight control synoptic page provides position indications of the primary control
surface, flap/slats and spoiler system. The roll, pitch and yaw trim indications are
shown on the EICAS display.
GX_10_005
RUDDER
LEFT
ELEVATOR
LEFT
AILERON
LEFT AND RIGHT
MULTIFUNCTION
SPOILERS
LEFT AND RIGHT
GROUND SPOILERS
RUDDER
LEFT AND
RIGHT ELEVATOR
LEFT AND
RIGHT AILERON
LEFT AND RIGHT
GROUND SPOILERS
RUDDER
RIGHT
ELEVATOR
RIGHT
AILERON
LEFT AND RIGHT
MULTIFUNCTION
SPOILER
SYSTEM NO. 1 SYSTEM NO. 3 SYSTEM NO. 2
For Training Purposes Only
Sept 04
10-7
P I LOT T R A I N I N G GU I D E
FLIGHT CONTROLS
FLIGHT CONTROL SYNOPTIC PAGE
FLIGHT CONTROLS
FLAP 3O
AIL
ELEV
RUDDER
SLAT OUT
AIL
ELEV
GX_10_006
Flap Position
Indication
Slat Display
Ground Spoiler
Display
Aileron
Aileron Position
Indication
Rudder Position
Indication
Flap Display
Multifunction
Spoiler Display
Elevator Position
Indication
Elevator Display
5O
O
3.4
75O
115
81
ART
I
G
N
ND
STAB
789 DN DN DN
OUT
3O
GEAR
–TRIMS–
NL RUDDER NR
AIL
LWD RWD
7.2
NU
Control surface
displays:
• Flaps
• Slats
• Spoilers
Trim displays:
• Aileron
• Rudder
• Stabilizer
EICAS PAGE
Slat Position
Indication
P I LOT T R A I N I N G GU I D E
FLIGHT CONTROLS
10-8 For Training Purposes Only
Sept 04
AILERON CONTROL
Lateral (roll) control is provided by ailerons operating in relation to control wheel
displacement and controlled via control rods, cable runs and quadrants. The ailerons
are assisted by four multifunction spoilers per wing, which are electrically controlled.
AILERON CONTROL GENERAL ARRANGEMENT
Aileron Control System
Two separate lateral control systems are provided: the pilot’s side operates the lefthand
aileron and the copilot’s side operates the right-hand aileron.
Normally, both control systems are interconnected through the forward torque tube
interconnect assembly, and there is simultaneous movement of both ailerons.
GX_10_003
Roll Disconnect
Mechanism
Multifunction
Spoiler (reference)
Power
Control
Unit (PCU)
AFT QUADRANT
Autopilot
Servo
Aileron Trim
Actuator
Roll Control
Transducer
FORWARD
QUADRANT
Torque
Tube
Position
Transducer
Multifunction
Spoiler (reference)
For Training Purposes Only
Sept 04
10-9
P I LOT T R A I N I N G GU I D E
FLIGHT CONTROLS
Aileron Control System Operation
The Pilot’s and copilot’s roll controls are interconnected through a torque tube. At the
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