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module, spoiler electronic control units (SECUs).
Roll assist is provided by asymmetric deployment of the spoilerons. Deployment is relative
to control wheel inputs, Mach number and flap position. Roll assist is used to improve lateral
control of the aircraft at low airspeeds.
Proportional lift dumping is provided in flight by symmetric deployment of the flight spoilers.
Deployment is relative to the position of the flight spoiler control lever. Proportional lift
dumping is used for speed control and to stabilize the aircraft on the glide path or during
rapid descents.
The ground spoilers provide ground lift dumping function only. Ground lift dumping is used
to assist in aircraft braking on the ground by full deployment of the spoilerons, flight spoilers
and the ground spoilers Ground lift dumping is normally automatic but can be manually
controlled by the GND/LIFT DUMPING switch on the center pedestal. Automatic
deployment is triggered on the basis of:
S Thrust lever position
S Engine N1 signals
S Radio altitude
S Wheel speed from the anti--skid control unit (ASCU)
S PSEU weight-on-wheels conditions.
Effectivity:
S Airplanes 7002, 7003 to 7066 and 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
hydraulic systems powered.
REV 56, Jan 31/03
Vol. 1 11--70--2
FLIGHT CONTROLS
Spoilers
Flight Crew Operating Manual MASTER
CSP A--013
Spoiler System
Figure 11---70---1
OUTBD
GROUND
SPOILER
SPOILERON SPOILERON
INBOARD
GROUND
SPOILER
FLIGHT
SPOILER
LIFT DUMPING
WHEN AIRPLANE
IS ON GROUND
DC
BUS 1
DC
BUS 2
DC ESS
BUS
Vol. 1 11--70--3
REV 56, Jan 31/03
FLIGHT CONTROLS
Spoilers
Flight Crew Operating Manual
CSP A--013
MASTER
Spoiler System Controls
Figure 11---70---2
Ground Lift Dumping Toggle Switch
AUTO -- Arms the ground lift dumping
system automatically when airplane is
in the landing configuration.
MAN ARM -- Manually arms the ground
lift dumping system if automatic arming
fails.
MAN DISARM -- Disarms the ground lift
dumping system in the event of an
inadvertent deployment or failure of
automatic system.
0
REV 56, Jan 31/03
Vol. 1 11--70--4
FLIGHT CONTROLS
Spoilers
Flight Crew Operating Manual MASTER
CSP A--013
The spoiler ground lift dumping (GLD) circuits must be armed before deployment can take
place. The GLD system is armed either automatically or manually. After landing or a
rejected takeoff, the GLD spoilers automatically retract. During a touch--and--go, the GLD
spoilers will deploy when all deployment parameters are met. Advancing the thrust levers
for takeoff retracts the spoilers and rearms the system.
A. GLD Arming
(1) Automatic arming
S Spoiler control switch in the AUTO position, and
S L or R engine > 79% N1 or thrust levers > takeoff power, and
S Wheel speed >45 kts.
(2) Manual arming
S Spoiler control switch in the MAN ARM position.
Vol. 1 11--70--5
REV 56, Jan 31/03
FLIGHT CONTROLS
Spoilers
Flight Crew Operating Manual
CSP A--013
MASTER
Spoiler System Synoptic Page Indications <MST>
Figure 11---70---3
FLT Control Synoptic Page
0
0 20 20
FLIGHT CONTROLS
14
0
0
14
8
AIL AIL
ELEV
--TRIM--
NU
ND
NL NR
LWD
ELEV
RWD
RUDDER
AIL STAB
0
0
0
Spoiler Deployment Readout (white)
Indicates angle of deployment, in degrees,
of respective spoiler. Two amber dashes are
displayed when input data is invalid.
Spoiler Position Indicator (white)
Indicates relative position of respective
spoiler. Indicator is not displayed when
respective spoiler is retracted or input
data is invalid.
Ground Spoiler Position Indicators (white)
Are either shown fully extended to the full
travel mark, when ground spoilers are deployed,
or not shown at all, when ground spoilers are
retracted.
Ground Spoiler Outline
Green --Respective hydraulic manifold and
respective SECU are operative.
White -- Loss of redundancy in respective
ground spoiler.
Amber -- Respective hydraulic manifold or
respective SECU is inoperative.
Half--Intensity Magenta -- Input data invalid.
Maximum Spoiler Deployment Mark (white)
Indicates full deployment point of respective
spoiler.
　
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