Flight Controls

Question 1

Which yoke is connected to the right aileron

Answer 1

First officer’s

Question 2

Which yoke is connected to the left aileron

Answer 2

Captain’s

Question 3

How are the ailerons, elevators and rudder actuated

Answer 3

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 actuates the control surface.

Question 4

Which yoke controls the right elevator

Answer 4

First officer’s

Question 5

Which yoke controls the left elevator

Answer 5

Captain’s

Question 6

What is the purpose of the Multifunction Spoilers (MFS)

Answer 6

To assist with roll control and serve as a spoiler in flight and on landing.

Question 7

Are the Multifunction spoilers operational at any speed

Answer 7

Yes

Question 8

How are the (Multifunction Spoilers) MFSs controlled when used for roll assistance

Answer 8

The FO’s yoke position sends an electrical signal to the left MFS panels which are hydraulically operated by PCUs.

The CA’s yoke position sends an electrical signal to the right MFS panels which are hydraulically operated by PCUs.

Question 9

What is the flight deck indication of a jammed aileron cable

Answer 9

Both yokes will be jammed

Question 10

What happens after the ROLL DISC handle is pulled

Answer 10

The aileron cable and pulley systems are disconnected through torque tubes.

20 seconds later, if the operable side has not been selected, the amber ROL SEL switch light illuminates

Question 11

How is the operable side selected

Answer 11

By pushing the ROL SEL/PLT ROL switch light on the unjammed side

Question 12

What does pushing the ROL SEL/PLT ROL switch light accomplish

Answer 12

Allows the pilot with the operable aileron to control the on-side MFS panels

Question 13

What is the flight deck indication of an aileron PCU runaway

Answer 13

Aircraft begins an uncommanded roll and the PLT SEL switch light on the side without the PCU runaway illuminates automatically because of the bungee break-out signal
9lbs force

Question 14

What is occurring when the pilots trim the ailerons or rudder?

Answer 14

The control surface is being repositioned.

There are no trim tabs

Question 15

What panels are part of the GND LIFT dumping system

Answer 15

Inboard and outboard ground spoilers, all 4 MFS panels

Question 16

How are the flight controls gust locked

Answer 16

Hydraulic fluid is trapped during shutdown

Question 17

How is the Yaw Damper engaged

Answer 17

YD1 and YD2 engage switch lights on the center pedestal

Question 18

How is the Yaw Damper disengaged

Answer 18

DISC button on the center pedestal

Question 19

What controls the yaw damper

Answer 19

The flight control computer

Question 20

Is it necessary to disconnect the Yaw Damper on landing

Answer 20

No

Question 21

How are the flaps operated

Answer 21

Electrically

Question 22

How many flap segments does the CRJ have

Answer 22

4 total, 2 on each wing

Question 23

Is there any asymmetrical protection within the flaps

Answer 23

Yes, if the flap segments differ by > 5 degrees, the brakes are applied and the flaps will remain at the current position

Question 24

How is STAB TRIM operated

Answer 24

Electrically. A split switch on the control yoke operates two motors and a jack screw changing the horizontal stabilizer angle of incidence

Question 25

What systems can operate the STAB TRIM

Answer 25

CA’s trim switches,
FO’s trim switches,
autopilot and
MACH trim

Question 26

What is the priority for STAB TRIM control

Answer 26

CA
FO
Autopilot
MACH trim