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motor and asymmetry brake and one flap PDU motor and asymmetry brake. System control provides
protection against asymmetry and uncommanded movement.
Slat/Flap System Schematic
SLAT/FLAP
CONTROL
LEVER
DRIVELINE SLAT SYSTEM
SLAT SYSTEM
FLAP SYSTEM
FLAP SYSTEM
SFCU 1 SFCU 2
GF1010_034
FLIGHT CONTROLS
Rev 2A, Apr 11, 2005 Flight Crew Operating Manual
CSP 700−5000−6
Volume 2
10−10−29
SLAT CONTROL SYSTEM
The slat system has four leading edge slat panels with two actuators per slat panel connected to a
slats Power Drive Unit (PDU), linked through a rigid driveline (torque tubes/bearings) and controlled
by the slat/flap handle position. The PDU is driven by two DC motors connected together in a speed
sum configuration. Each motor is controlled by a single channel SFCU. There is a brake on each slat
motor that is also controlled by the SFCU. The PDU provides protection against an overload and jam
condition. To protect against asymmetry, there are dual coil brakes and position sensors located on
each outboard station, left and right, that interface with both SFCUs.
The slats are antiiced
and automatically controlled by the ice detection system. Telescopic ducting is
installed between the inboard fixed leading edge and the outboard slats for antiicing.
Refer to
Chapter 14 for additional information on the antiicing/
bleed system.
Slat System Schematic
SLAT/FLAP
CONTROL
LEVER
SLAT SYSTEM
POWER DRIVE UNIT
DRIVELINES
SFCU 1 SFCU 2
GF1010_035
The slat position and surface position is displayed on the EICAS FLIGHT CONTROL synoptic
page. Slat indication is also shown on the EICAS PRIMARY PAGE.
FLIGHT CONTROLS
Flight Crew Operating Manual Rev 2A, Apr 11, 2005
CSP 700−5000−6
Volume 2
10−10−30
SLAT CONTROL SYSTEM (CONT'D)
Slat Position and Surface Indications
Failure annunciations
can be displayed
above the SLAT label
Slat Position Indication Slat Surface
Slat/Flap surfaces retracted Slat/Flap surfaces extended
GF1010_036
FLIGHT CONTROLS
SLAT IN
FLAP 0
AIL
ELEV
RUDDER
AIL
ELEV
FLIGHT CONTROLS
SLAT OUT
FLAP 30
AIL
ELEV
RUDDER
AIL
ELEV
Slat Position Indication and Surface color
If the slats are at commanded position, the slat position indication and slat surface
will turn green.
If the slats are in motion, the slat position indication and slat surface will turn white.
If the"SLAT FAIL"or " SLAT FAULT" message is displayed,
the slat position indication and slat surface will turn amber.
HALFSPEED
DRIVE OVERHEAT 1
DRIVE OVERHEAT 2
DRIVE OVERHEAT 1−2
SLAT HALFSPD
Synoptic Failure Annunciations Logic
FLIGHT CONTROLS
Rev 2A, Apr 11, 2005 Flight Crew Operating Manual
CSP 700−5000−6
Volume 2
10−10−31
FLAP CONTROL SYSTEM
The flap system has three flap panels with four actuators per wing connected to a flaps Power Drive
Unit (PDU), linked through a rigid driveline (torque tubes/bearings) and controlled by the slat/flap
handle position. The PDU is driven by two DC motors connected together in a speed sum
configuration. Each motor is controlled by a single channel SFCU. There is a brake on each flap
motor that is also controlled by the SFCU. The PDU provides protection against an overload and jam
condition.
To protect against asymmetry, there are dual coil brakes and position sensors located on each
outboard station, left and right, that interface with both SFCUs. There are also direction sensors on
the flap system used to detect actuator disconnects. The sensors on the left wing report to SFCU 1
and the sensors on the right wing report to SFCU 2.
Flap System Schematic
SLAT/FLAP
CONTROL
LEVER
FLAT SYSTEM
POWER DRIVE UNIT
ACTUATOR
SFCU 1 SFCU 2
GF1010_037a
SENSOR
POSITION
TRANSDUCER
(2 DC MOTORS, 1 PER SFCU CHANNEL)
The flap position and surface position is displayed on the EICAS FLIGHT CONTROL synoptic
page. Flap indication is also shown on the EICAS PRIMARY PAGE.
FLIGHT CONTROLS
Flight Crew Operating Manual Rev 2A, Apr 11, 2005
CSP 700−5000−6
Volume 2
10−10−32
FLAP CONTROL SYSTEM (CONT'D)
Flap Position and Surface Indications
Failure annunciations
can be displayed below
the FLAP label
Flap Position Indication Flap Surface
Slat/Flap surfaces retracted Slat/Flap surfaces extended
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