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control wheels to deflect in the direction of trim input. Aileron trim position is indicated on the
EICAS primary page.
Rudder Trim
Rudder trim is accomplished by turning the RUD TRIM switch. Rudder trim input is applied by
the trim actuator into the yaw damper/trim mixer assembly, and will supplement the primary
rudder input, as applicable. Actuation of the rudder trim does not cause rudder pedal deflection.
The rudder trim position is indicated on the EICAS primary page.
FLIGHT CONTROLS
Description
Vol. 2 10−10−10
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
SECONDARY FLIGHT CONTROLS (CONT'D)
Aileron/Rudder Trim Panel
Figure 10−10−7
Aileron/Rudder Trim Indications
Figure 10−10−8
Flaps
Two double-slotted flap panels (inboard and outboard) are externally hinged on the trailing edge
of each wing. A flap lever, located on the center pedestal, sends a signal to the flap control unit
(FCU) to initiate flap movement.
The flaps may be set to one of four positions: 0, 20, 30, and 45 degrees. A flap gate is
incorporated within the flap lever 20-degree detent. This minimizes the possibility of accidental
flap retraction to 0 degrees during a go-around procedure. Flap position is displayed on the
EICAS primary page and the flight controls synoptic page, in both analog (colored bar) and
digital formats. The indication on the EICAS primary page are in view only if flaps are extended,
or if the landing gear is not up and locked.
FLAP SETTING MAXIMUM AIRSPEED
20 degrees 231 kias
30 degrees 197 kias
45 degrees 189 kias
NOTE
To prevent damage, maximum indicated airspeed for each flap
setting must not be exceeded. These are placarded on the
instrument panel (See Airplane Flight Manual for current airspeeds).
FLIGHT CONTROLS
Description
Vol. 2 10−10−11
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
SECONDARY FLIGHT CONTROLS (CONT'D)
Flap Control Unit
When the FCU commands a change in flap position, the flap brakes are released, and two
AC-powered motors, mounted on a flap gearbox, are energized. The gearbox rotates flex shafts,
which move the flap ballscrew actuators, extending or retracting the flaps. When the desired
setting is reached, the motors are deenergized and the flap brakes are applied. The flaps are
mechanically interconnected for simultaneous movement of the inboard and outboard flap
sections.
Flap position and condition is continuously monitored by the flap control unit. In the event of
failure or overheat of a single flap motor (indicated by a FLAPS MOTOR OVHT status EICAS
message), the remaining motor can operate the flaps at half speed. Complete failure of the flap
system, including an asymmetry of >2.75°, will generate a FLAPS FAIL caution EICAS message,
as well as an amber symbol on the EICAS FLIGHT CONTROLS synoptic page.
If the flaps are not set at 20° with the aircraft in takeoff mode, a CONFIG FLAPS warning EICAS
message and aural warning will be displayed/sounded.
FLIGHT CONTROLS
Description
Vol. 2 10−10−12
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
SECONDARY FLIGHT CONTROLS (CONT'D)
Flap Schematic
Figure 10−10−9
Flight Spoilers
These provide lift dumping and speed control when airborne, and reduce ground roll during
landing and rejected takeoffs.
FLIGHT CONTROLS
Description
Vol. 2 10−10−13
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
SECONDARY FLIGHT CONTROLS (CONT'D)
Each flight spoiler panel is hydraulically operated by two identical PCUs, powered by hydraulic
systems 1 and 2. The flight spoilers are mechanical controlled by the flight spoiler control lever
on the center pedestal, and can be deployed up to a maximum of 40° in flight or on the ground.
The flight spoiler control lever travels through nine detents, allowing the pilot to select variable
amounts of flight spoiler deployment.
Spoiler position is indicated on both the EICAS status and FLIGHT CONTROLS synoptic pages,
using white arrows which move upward towards lines indicating relative extension (for flight
spoilers only, and full extension (for both flight and ground spoilers). When the flight and ground
spoilers are fully retracted, all EICAS icons and position arrows disappear.
An amber FLT SPLR DEPLOY caution EICAS message appears if the flight spoilers are deployed
in flight, and:
• The aircraft radio altitude is between 10 and 300 feet AGL, or
• The left or right engine N1 is greater than 79%, or
　
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