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· Deployed or retracted position.
Spoilers position and condition is continuously monitored and any fault detected is displayed on
EICAS.
FLIGHT CONTROLS
SLAT OUT
FLAP 30
AIL
ELEV
RUDDER
AIL
ELEV
FLIGHT CONTROLS
REV 41, Jul 08, 2004 Flight Crew Operating Manual
CSP 700−6
Volume 2
10−10−39
SPOILER PRIMARY EICAS DISPLAY
Spoiler operation can be monitored when the popup
window is displayed on the primary EICAS
page.
Spoilers Display
Multifunction
and ground spoilers
are shown in the deployed position.
GF1010_051
GEAR
OUT
30
DN DN DN
ND
STAB
NU
NL RUDDER
LWD RWD
NR
TRIMS
7.2
AIL
The following are examples of spoiler configurations displayed on the primary EICAS page:
FLIGHT CONTROLS
Flight Crew Operating Manual REV 41, Jul 08, 2004
CSP 700−6
Volume 2
10−10−40
FLIGHT SPOILER CONTROL LEVER
The flight spoiler control lever (FSCL) located in the centre pedestal (flight compartment) is the input
handle which controls the MFS surfaces for lift dumping in flight. Markings on the mounting plate are
illuminated by integral lighting located in the lever. The FSCL includes four sensors to transmit input
lever command to the FCUs.
The MFS may be extended to any position, between 0 and FULL, as required for the intended flight
path. The MAX position is used for emergency descent whereby all MFS deploy if flaps are retracted
to zero degrees. The FSCL unlatch selector located on top of the FSCL must be pressed to release
the lever from the zero position and from the FULL to MAX position. If the flaps are not retracted,
only the inboard MFS are available for lift dump and the MAX selection will have no effect.
GND LIFT DUMPING/AUTOBRAKE CONTROL PANEL
The panel is located in the centre pedestal (flight compartment) and is used to manually arm or
disarm the spoiler system.
GND LIFT
DUMPING
AUTO BRAKE
FLIGHT CONTROLS
REV 41, Jul 08, 2004 Flight Crew Operating Manual
CSP 700−6
Volume 2
10−10−41
SPOILER FUNCTIONS
The spoiler system performs the following:
· ROLL ASSIST − by asymmetric deployment of up to four pairs of MFS to augment the ailerons
control. The surface deflection is a function of the handwheel roll angle (derived from the
average of two sensors) compensated with airspeed and flaps position. Right wing down
command deploys the right spoilers, left remain stowed. Left wing down deploys the left
spoilers, right spoilers remain stowed.
· PROPORTIONAL LIFT DUMPING − by symmetric deployment of up to four pairs of MFS
commanded by the FSCL. Four pairs of MFS may be deployed when the flaps are fully
retracted. Two pairs (inboard) of MFS will deploy when the flaps are in any of their extended
position detents. Under this condition, the outboard MFS will be available for roll assistance
only.
· GROUND LIFT DUMPING − through the symmetric full extension of all spoilers upon landing
or rejected takeoff
condition. At initial touchdown with at least one left or right main landing
gear indicating onground
(wheels spinning up), the two pairs of GS deploy first. The
deployment of the two pairs of MFS is delayed (until weight on wheels) slightly to prolong roll
control.
· COMBINATION ROLL ASSIST AND PROPORTIONAL LIFT DUMPING − MFS control mixes
the roll command and proportional lift dumping command. To command a handwheel
command and a FSCL command, spoiler deployment of one wing decreases and increases on
the other. The roll effect is obtained by the differential deployment of left and right spoilers.
For roll assist and proportional lift dumping, the spoiler scheduling depends on handwheel roll
sensors and FSCL sensors. Corrections to the scheduling is a function of the airplane airspeed
provided by the three air data computers and flap position under control of the SFCUs.
SPLRS/STAB IN TEST
An advisory message “SPLRS/STAB IN TEST” will be displayed when the spoilers and stab trim
systems are performing selftest
when hydraulics are first applied. The spoiler system is inoperative
throughout the duration (approximately 20 seconds) of the test.
FLIGHT CONTROLS
Flight Crew Operating Manual REV 41, Jul 08, 2004
CSP 700−6
Volume 2
10−10−42
ROLL SPOILER PRIORITY
The “ROLL SPLRS” priority switches are located on the glareshield at each pilot position. They are
released/pressed switches with a split legend, an amber “ROLL SEL” and a white “PLT ROLL”
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