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module, spoilerelectronic controlunits(SECUs).
Roll assistis providedby asymmetric deploymentofthe spoilerons. Deploymentis relative
tocontrolwheelinputs, Mach numberandflapposition. Roll assistis usedtoimprove lateral
control oftheaircraftatlow airspeeds.
Proportionalliftdumpingis providedin flightby symmetric deploymentoftheflight spoilers.
Deploymentis relative totheposition oftheflight spoiler controllever. Proportionallift
dumpingis used for speed controlandto stabilize the aircraft on the glide path or during
rapiddescents.
The ground spoilers provide groundliftdumpingfunction only. Groundliftdumpingis used
toassistin aircraftbraking on thegroundbyfulldeploymentofthe spoilerons, flight spoilers
andtheground spoilers Groundliftdumpingis normallyautomatic butcan be manually
controlledbytheGND/LIFTDUMPING switch onthecenterpedestal. Automatic
deploymentis triggered onthebasis of:
W Thrustlever position
W Engine N1 signals
W Radio altitude
W Wheel speedfrom theanti-
skid controlunit(ASCU)
W PSEUweight-on-wheels conditions.
Effectivity:
W Airplanes 7002,7003 to7066and subsequent.
NOTE
On the ground, the IB, OB GND SPLR FAULT status message(s) can be cleared by deploying/retracting the ground spoilers with all hydraulicsystems powered.
Flight Crew Operating Manual MASTER
CSP A-
013
Vol. 1
11--70--2
FLIGHT CONTROLS
REV56,Jan 31/03
Spoilers
DC ESS BUS
DC BUS 1 DC BUS 2
OUTBD GROUND SPOILER SPOILERON INBOARD GROUND SPOILER FLIGHT SPOILER LIFT DUMPING WHENAIRPLANE IS ON GROUND SPOILERON
Spoiler System
Figure 11 ---70 ---1
Flight Crew Operating Manual
MASTER
CSP A-
013
FLIGHT CONTROLS Vol. 1 11--70--3
Spoilers REV 56, Jan 31/03
Spoiler System Controls
Figure 11---70---2
Flight Crew Operating Manual MASTER
CSP A-
013
FLIGHT CONTROLS Spoilers Vol. 1 11--70--4
REV 56, Jan 31/03
The spoiler groundliftdumping(GLD) circuits mustbe armedbefore deployment can take place. The GLDsystemis armed eitherautomatically ormanually. Afterlanding ora rejectedtakeoff,theGLD spoilers automatically retract. During atouch-
and-
go,theGLD spoilers willdeploy whenalldeploymentparameters are met. Advancingthethrustlevers for takeoff retractsthe spoilers and rearmsthe system.
A. GLD Arming
(1)
Automatic arming
W Spoiler control switchin theAUTOposition,and
W Lor Rengine >79%N1 or thrustlevers >takeoffpower, and
W Wheel speed>45kts.
(2)
Manual arming
W Spoiler control switchinthe MANARMposition.
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