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has failed, loss of cross--channel talk,
flap skew detection or sensor failure,
or any flap actuator fault.
FLAPS EMER
SLAT FAULT
FLAP FAULT
SLATS HALFSPEED
FLAPS HALFSPEED
SLATS or FLAPS HALFSPEED status (white)
Indicates that one channel of the respective system
has failed or system is operating on ADG power.
Status Page
Primary Page
Vol. 1 11--60--6
FLIGHT CONTROLS
Flaps and Slats Sep 09/02
Flight Crew Operating Manual
CSP C--013--067
A. System Circuit Breakers
SYSTEM SUB--SYSTEM CB NAME BUS BAR CB
PANEL
CB
LOCATION
NOTES
Flaps
FLAPS CONT
CH 1
DC
ESSENTIAL 2 R1
Flaps and
FLAPS CONT
CH 2 BATTERY
1
L5
Slats
Slats
SLATS CONT
CH 2
BUS L6
SLATS CONT
CH 1
DC
ESSENTIAL 2 R2
Vol. 1 11--70--1
FLIGHT CONTROLS
Spoilers REV 3, May 03/05
Flight Crew Operating Manual
CSP C--013--067
1. SPOILERS
Spoiler control consist of two multi-functional spoilers and two ground spoilers on each wing.
Each spoiler is actuated by a single electro--hydraulic power control unit. The
multi-functional spoilers provide roll assist and proportional lift dumping functions. The
ground spoilers provide ground lift dumping function only. Spoiler operation is controlled by
two, dual channel, spoiler and stabilizer control units (SSCUs).
Roll assist is provided by asymmetric deployment of the multi-functions spoilers.
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 by symmetric deployment of the multi-functional
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 airplane on the glide path or during
rapid descents.
Ground lift dumping is used to assist in aircraft braking on the ground. Ground lift dumping
is provided by full deployment of multifunctional 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 engine
throttle position, radio altitude, wheel speed and weight-on-wheels conditions.
Vol. 1 11--70--2
FLIGHT CONTROLS
Spoilers REV 3, May 03/05
Flight Crew Operating Manual
CSP C--013--067
Spoiler Control System
Figure 11---70---1
SSCU1 SSCU 2
SPOILER
ACTUATOR
HYD
3
HYD
1
HYD
HYD 2
1
GROUND SPOILER
SELECTOR VALVE 1
GROUND SPOILER
SELECTOR VALVE 2
CMD/MON
EICAS
DCU 1 DCU 2
ADC
1
ADC
2
LA
IOC
RAD
ALT 1
PSEU
CH. 1
ASCU
CH. A
CMD/MON CMD/MON CMD/MON
ADC
1
ADC
2
LB
IOC
RAD
ALT 2
PSEU
CH. 2
ASCU
CH. B
HYD
HYD 3
HYD 1
2
HYD
1
Vol. 1 11--70--3
FLIGHT CONTROLS
Spoilers REV 3, May 03/05
Flight Crew Operating Manual
CSP C--013--067
Spoiler Control Panel and Lever
Figure 11---70---2
1/4
1/2
3/4
R
0
E
T
R
A
C
T
SPOILERS
GND LIFT
DUMPING
MAN ARM
AUTO
MAN
DISARM
OFF OFF
LH RH
ARMED ARMED
THRUST
REVERSER
Flight Spoiler Control Lever
Used to control proportional lift dumping.
GND LIFT DUMPING
Used to select ground lift dumping.
AUTO -- Arms the ground lift dumping
system for automatic deployment when
the 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.
Vol. 1 11--70--4
FLIGHT CONTROLS
Spoilers REV 3, May 03/05
Flight Crew Operating Manual
CSP C--013--067
Spoilers --- Flight/Control Synoptic Page
Figure 11---70---3
Maximum Spoiler Deployment Mark (white)
Indicates full deployment point of respective spoiler.
Multi--Function Spoiler Outline
Green -- Spoiler is operative.
White -- Loss of roll asist, proportional
lift dumping or redundancy.
Amber -- Spoiler is inoperative.
Spoiler X Marking (amber)
Indicates input data is invalid.
Spoiler Position Indicator (white)
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