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Moving the lever between positions actuates the flap lever detent switch and energizes a 75-second timing circuit within
the flap control unit. This circuit allows the arming solenoid valve within the flap power unit to energize open for 75 seconds
and then de-energize.
FLAP POSITION INDICATION
Flap position is shown in a digital display on the (EICAS) and flight control synoptic page.
CFO1005002_007
FLAPS
VFE
210
VFE
210
VFE
175
10
20
30
0
FLIGHT CONTROLS
Volume 2 Flight Crew Operating Manual Sep 13/2004
10-02-08 CSP 100-6 REV 1
SECONDARY FLIGHT CONTROLS (Cont)
SPOILER SYSTEM
On the upper surface of each wing there are four spoiler panels. The two inboard panels are the ground spoilers, and the
two outboard panels are the multifunction spoilers.
The system is computer controlled and hydraulically operated, two ground spoilers provide ground lift dumping functions.
The multifunction spoilers provide roll assist, proportional lift dumping and ground lift dumping functions.
The ground spoilers have only two positions: fully retracted during flight or fully deployed after landing. The inboard and
outboard ground spoilers, when tied together with the multifunction spoilers, comprise the ground spoilers system.
CFO1005002_001
GROUND
SPOILER MULTI-FUNCTION
SPOILER
FLIGHT CONTROLS
May 06/2005 Flight Crew Operating Manual Volume 2
REV 2 CSP 100-6 10-02-09
SECONDARY FLIGHT CONTROLS (Cont)
COMPONENTS AND OPERATION
SPOILER ELECTRONIC CONTROL UNIT (SECU)
Two electronic units, SECU 1 and SECU 2, control the spoilers. The SECUs contain all the functions necessary to transmit
the spoiler sensor outputs and control the spoiler actuators. The SECUs also supply crew-alerting system messages, maintenance
messages, and flight-data recorder data.
FLIGHT SPOILERS LEVER
The flight spoilers lever provides symmetric deployment of two pairs of multifunction spoilers via the SECU. In normal
operation there are nine detented positions between 0 and MAX. The 0 position is gated and requires pressing the push
button on top of the lever to release. The 0 position can be reselected without pushing the button. A tenth position for emergency
descent is also available. The EMER position is gated and requires pressing the push button to engage. The lever
will return anywhere within the 0 to MAX position from EMER without pressing the button.
The spoiler graphic display on the top half of the left MFD declutters after 60 seconds when the spoilers are retracted. The
graphic will automatically be displayed again when the ground or flight spoilers are extended or a spoiler failure exists.
0
FLIGHT
SPOILERS
R
E
T
R
A
C
T
PITCH DISC
PULL & TURN
CFO1005002_002
M
A
X
EMER
REV 2
FLIGHT CONTROLS
Volume 2 Flight Crew Operating Manual Sep 13/2004
10-02-10 CSP 100-6 REV 1
SECONDARY FLIGHT CONTROLS (Cont)
ROLL SPOILERS
Roll spoilers assist is provided through the multifunction spoilers (MFSs) to assist the ailerons in providing roll control.
Each panel is electronically controlled by the SECU, and operated by a single hydraulically actuated power control unit
(PCU). Pilot inputs to the roll assist system are through the control wheels, and the ROLL SPOILERS switch located on
the center pedestal
ROLL SPOILERS DISCONNECT
If the aileron cable system jams, the pilot must activate the roll disconnect feature on the pilot’s control wheel. This action
disconnects the pilot’s wheel from the cable system, permitting continued roll assist by the pilot if the jam is not in the
pilot’s wheel.
The ROLL SPOILERS switch is located on the center pedestal. If the jam is in the pilot’s wheel, raising the guarded switch
and pressing OFF disables the roll assist function. A ROLL SPOILERS OFF (C) will be illuminated on the EICAS. A
ROLL SPOILERS OFF (S) is illuminated when the roll spoilers have been turned off and the roll disconnect has been activated.
Pressing the switch again, reengages the roll assist function and extinguishes the CAS message
CFO1005002_005
MIC ID
SECU1
COMMAND MONITOR ARINC 429
ROLL
DISCONNECT
SWITCH
SECU2
COMMAND MONITOR
RVDTS RVDTS
COPILOT
CONTROL
WHEEL
PILOT
CONTROL
WHEEL
OFF ID MIC
ROLL SPOILERS
FLIGHT CONTROLS
Sep 13/2004 Flight Crew Operating Manual Volume 2
REV 1 CSP 100-6 10-02-11
SECONDARY FLIGHT CONTROLS (Cont)
FLIGHT SPOILER SCHEMATIC
CFO1005002_004
RVDT S
SECU1
COMMAND MONITOR
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