FLIGHT CONTROLS
Sep 13/2004 Flight Crew Operating Manual Volume 2
REV 1 CSP 100-6 10-01-01
INTRODUCTION
The primary flight controls are the elevators, rudder, ailerons and roll spoilers. The ailerons are cable operated. The spoilers
are electrically actuated and hydraulically operated. Cables connect the control column and rudder pedals to the hydraulic
power control units for the elevators and rudder. The elevators and rudder have a mechanical reversion capability in the
event of a dual hydraulic system failure.
The secondary flight controls consist of horizontal stabilizer, aileron, and rudder trims, flaps, and spoilers when operated
symmetrically (flight and ground spoilers).
DESCRIPTION
The primary flight controls are arranged conventionally with rudder pedals and a control wheel and column for both the
pilot and copilot. The roll spoilers, ailerons, elevators, and rudder are operated by means of conventional dual control
wheels, dual control columns, and dual rudder pedal assemblies. The aileron system is a reversible mechanical cable system.
The spoilers are controlled through an electronic/hydraulic fly-by-wire system. The elevator and rudder are mechanically
controlled and hydraulically powered systems. The elevator and rudder has a manual reversion capability in the event
of a dual hydraulic failure.
CFO1001002_013
ELEVATORS
RUDDER
AILERON
FLAPS
GROUND
SPOILERS
HORIZONTAL
STABILIZER
MULTI-FUNCTION
SPOILERS
FLIGHT CONTROLS
Volume 2 Flight Crew Operating Manual Sep 14/2005
10-01-02 CSP 100-6 REV 4
PRIMARY FLIGHT CONTROLS
COMPONENTS AND OPERATION
AILERONS AND MULTIFUNCTION SPOILERS
The aileron control cable runs to both control wheels and both ailerons. The roll disconnect mechanism disconnects the
pilots control wheel from the aileron circuit. When disconnected, the pilot controls the roll spoilers and the copilot controls
both ailerons. Normally the aileron and roll spoilers are interconnected and there is a simultaneous and coordinated movement
of all lateral control surfaces from either pilot station.
Moving the control wheels also generates a signal that is sent to the spoiler electronic control units (SECU 1 and SECU 2).
Dual redundant modules within the SECU control the extension/retraction of the multifunction spoilers (MFS). The SECUs
combine the control wheel signals with other information to determine the required multifunction spoiler panel deflection
for any given airplane configuration. There are four spoiler panels on each wing. The two outboard panels are the multifunction
spoilers that operate asymmetrically in a roll, symmetrically for flight spoilers, and on the ground as ground spoilers.
The two inboard spoilers only operate on the ground. A single power control unit is used on each spoiler. The MFS
operate on the down-going wing only to assist the ailerons in roll control. In order to reduce roll control forces, an aileron
balance geared tab is mounted on each aileron. The balance tabs have a maximum ±15 degrees of travel each side of the
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