Flight Controls

Question 0

How are the ailerons, elevators, and rudder actuated?

Answer 0

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 that hydraulically actuates the control surface

Question 1

Which yoke is connected to the right aileron? The left aileron?

Answer 1

First officers/ captains

Question 2

Which yoke controls the right elevator? The left?

Answer 2

First officers/ captains

Question 3

What is the purpose of the multi function spoilers?

Answer 3

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

Question 4

Are the multi function spoilers operable at any speed?

Answer 4

Yes

Question 5

How are the MFSs controlled when used for roll assistance?

Answer 5

The F/Os yoke position sends an electrical signal to the left MFS panels which are hydraulically operated by the PCUs. The captains yoke sends an electric signal to the right MFS panels which are hydraulically operated by the PCUs

Question 6

What is the flight deck indication of a jammed aileron cable?

Answer 6

Both yokes will be jammed

Question 7

What happens after the roll disconnect handle is pulled?

Answer 7

The aileron cable and pulley systems are disconnected through torque tubes. 20 seconds later if the operable side hasn’t been selected, the amber ROL SEL switchlight illuminates

Question 8

How is the operable side selected for a roll disconnect?

Answer 8

By pushing the roll SEL switchlight on the I jammed side

Question 9

What does pushing the roll select switchlight do?

Answer 9

Allows the pilot with the operable aileron to control the onside MFS panels

Question 10

What is the flight deck indication of a PCU runaway?

Answer 10

Aircraft begins an uncommanded roll and the PLT switchlight on the side without the PCU runaway illuminates automatically because of the bungee breakout signal

Question 11

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

Answer 11

The control surface is being repositioned. There are no trim tabs

Question 12

What panels are part of the ground lift dumping system?

Answer 12

Inboard and outboard spoilers, all 4 MFS panels

Question 13

How are the flight controls gust locked?

Answer 13

Hydraulic fluid is trapped in the PCUs during shutdown

Question 14

His is the yaw damper engaged?

Answer 14

YD 1 and YD 2 engage push buttons on the center pedestal

Question 15

How is the yaw damper disengaged?

Answer 15

Disc button on the center pedestal

Question 16

What controls the yaw damper?

Answer 16

The flight control computer

Question 17

Is it necessary to disconnect the yaw damper during landing?

Answer 17

No

Question 18

How are the flaps operated?

Answer 18

Electrically

Question 19

How many flap segments does the CRJ have?

Answer 19

4 total, 2 on each wing

Question 20

Is there any asymmetrical protection within the flaps?

Answer 20

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

Question 21

How is the STAB TRIM operated?

Answer 21

Electrically, a split switch on the yoke operates two motors and a jackscrew to change the horizontal stabilizer angle of incidence

Question 22

What systems can operate the stab trim?

Answer 22

CAs trim switches, FOs trim switches, autopilot and Mach trim

Question 23

What is the priority for stab trim control?

Answer 23

CA, FO, AUTOPILOT, MACH TRIM