Flight Controls Flashcards
Which yoke is connected to the right aileron
First Officers
Which yoke is connected to the left aileron
Captains
How are the ailerons and rudder actuated
Yoke and pedals operate a system of cables and pulleys that connect to pull and push rods at the flight control which operate a hydraulic PCU (power control unit) which hydraulically actuated the control surface.
Which yoke controls the right elevator
First Officers
Which yoke controls the left elevator
Captains
What is the purpose of the Multifunction spoilers (MFS)
To assist with roll control and serve as a spoiler in flight and on landing
Are the multifunction spoilers operational at any speed
Yes
How are the MFSs controlled when used for roll assistance
The FOs yoke position sends an electrical signal to the left MFS panels which are hydraulically operated by PCUs The CAs yoke position sends an electrical signal to the right MFS panels which are hydraulically operated by PCUs
What is the flight deck indication of a jammed aileron cable
Both yokes will be jammed
What happens after the Roll Disc handle is pulled
The aileron cable and pulley system are disconnected through torque tubes 20 seconds later, if the operable side has not been selected the amber ROL SEL switch light illuminates
How is the operable side selected
By pushing the ROL SEL/PLT ROL switch light on the unjammed side
What does pushing the ROL SEL/PLT ROL switch light accomplish
Allows the pilot with the operable aileron to control the on-side MFS panels
What is the flight deck indication of an aileron PCU runway
Aircraft begins an uncommanded roll and the PLT SEL switch light on the side without the PCU runway illuminates automatically because of the bungee break out signal
What is occurring when the pilots trim the ailerons or rudder
The control surface is being repositioned there are no trim tabs
What panels are part of the GND Lift dumping system
Inboard and outboard ground spoilers, all 4 MFS panels
How are the flight controls gust locked
Hydraulic fluid is trapped during shutdown
How is the Yaw Damper engaged
YD1 and YD2 engage switch light on the center pedestal
How is the Yaw Damper disengaged
Disc button on the center pedestal
What controls the yaw damper
The flight control computer
Is it necessary to disconnect the yaw damper on landing
No
How are the flaps operated
Electrically
How many flap segments does the CRJ have
4 total, 2 on each wing
Is there any asymmetrical protection within the flaps
Yes, if the flaps segments differ by > 5 degrees the brakes are applied and the flaps will remain at the current position
How is STAB TRIM operated
Electrically a split switch on the control yoke operates two motors and a jack screw changes the horizontal stabilizer angle of incident
What system can operate the stab trim
CA s trim switches
FO s trim switches
Autopilot and Mach trim
What is the priority for Stab Trim control
CA FO autopilot Mach trim
SLATS move what degrees?
Move 2 positions 20 degrees and 25 degrees
SLATS move when
Legacy CRJ900
Enhanced CRJ900
Legacy: 1 or 8 slats 20 degrees flaps 20 goes to 25 degrees
Enhanced: 1, 8 or 20 degrees Slats 20 Flaps 30 Slats 25 degrees
