Flight Controls

Question 1

How are control surfaces actuated?

Answer 1

Hydraulically or electrically

Question 2

Primary flight controls:

Answer 2

elevator
rudder
ailerons

Question 3

Which controls are equipped with control disconnects?

Answer 3

elevator & ailerons

Question 4

Which control has an anti-jam mechanism?

Answer 4

rudder

Question 5

In the event of total electrical failure, which hydraulic pump is powered by the ADG?

Answer 5

3B

Question 6

What unit moves the ailerons?

Answer 6

PCU’s

Question 7

Are ailerons & MFS’s operated by the opposite yoke?

Answer 7

Yes

Question 8

How many PCU’s per aileron?

Answer 8

2

Question 9

SSCU’s

Answer 9

Spoiler Stabilizer Control Units

Question 10

What are the flutter dampers for in flight?

Answer 10

Prevent aileron flutter when all hydraulic fluid is lost to the PCU

Question 11

What are the flutter dampers for on the ground?

Answer 11

Gust lock function

Question 12

Does pulling the ROLL DISC allow all ailerons & MFS’s to be available to one yoke control?

Answer 12

Yes

Question 13

Selecting the ROLL SEL switch button on the glareshield allows the flying pilot to have control over the other:

Answer 13

spoileron

Question 14

If the bungee breakout switch is actuated, what control is now available to the flying pilot?
Should the ROLL DISC handle still be pulled?

Answer 14

MFS’s

Yes

Question 15

What provides rudder gust lock?

Answer 15

Trapped hydraulic fluid

Question 16

How many yaw damper systems?

Answer 16

2

Question 17

Is the yaw damper independent of the autopilot system?

Answer 17

Yes

Question 18

FCC’s

Answer 18

Flight Control Computers

Question 19

If both yaw dampers fail, does the autopilot disengage?

Answer 19

Yes

Question 20

CA operates the ___ elevator:

FO operates the ___ elevator:

Answer 20

Left

Right

Question 21

What happens if the PITCH DISC handle is pulled?

Answer 21

Reduced pitch control (1 elevator only)

Question 22

Secondary Flight Controls:

Answer 22

slats
flaps
MFS's
GLD devices
aileron, rudder, horizontal stabilizer trim

Question 23

How are the slats/flaps & trim actuated?

Answer 23

electrically

Question 24

How are the flight/ground spoilers actuated?

Answer 24

hydraulically

Question 25

Will changing aileron trim deflect the controls?

Answer 25

Yes

Question 26

Will changing rudder trim deflect the controls?

Answer 26

No

Question 27

Horizontal Stabilizer Trim AOI range?

Answer 27

+2 / -13 degrees

Question 28

Where are the PITCH TRIM DISC switches located?

Answer 28

On each pilot's control wheel

Question 29

AFCS

Answer 29

Autopilot Flight Control System

Question 30

SFECU

Answer 30

Slat/Flap Electronic Control Unit

Question 31

How many slats? | How many flaps?

Answer 31

3 per wing | 2 per wing

Question 32

Which yoke connected to left aileron? | Right aileron?

Answer 32

Captain | FO

Question 33

How are ailerons, elevators, & rudder actuated?

Answer 33

Yoke & pedals operate system of cables/pulleys that connect to push/pull rods at the flight control which operate a hydraulic PCU (power control unit) that hydraulically actuates control surfaces

Question 34

What is purpose of MFS's?

Answer 34

To assist with roll control & serve as a spoiler in flight/on landing

Question 35

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

Answer 35

Both yokes will be jammed

Question 36

What happens after the ROLL DISC handle is pulled?

Answer 36

Aileron cable/pulley systems disconnected through torque tubes. 20 seconds later, if operable side has not been selected amber ROL SEL switchlight illuminates.

Question 37

How is operable side selected?

Answer 37

Pushing the ROL SEL/PLT ROL switchlight on the unjammed side

Question 38

What does pushing the ROL SEL/PLT ROL switchlight accomplish?

Answer 38

Allows pilot with operable aileron to control opposite side MFS's

Question 39

What is the flight deck indication of an aileron PCU runaway?

Answer 39

Aircraft begins uncommanded roll & PLT SEL switchlight on side w/o PCU runaway illuminates automatically because of the bungee break-out signal

Question 40

What is occurring when pilots trim ailerons or rudder?

Answer 40

Control surface being repositioned. There are no trim tabs

Question 41

What panels are part of the GND LIFT dumping system?

Answer 41

Inboard & outboard ground spoilers, all 4 MFS's

Question 42

How are flight controls gust locked?

Answer 42

Hydraulic fluid trapped during shutdown

Question 43

How is Yaw Damper engaged?

Answer 43

YD1 & YD2 engage switchlights on the center pedestal

Question 44

How is Yaw Damper disengaged?

Answer 44

DISC button on center pedestal

Question 45

What controls yaw damper?

Answer 45

FCC

Question 46

Is it necessary to disconnect yaw damper on landing?

Answer 46

No

Question 47

How are flaps operated?

Answer 47

Electrically

Question 48

How many flap segments does CRJ have?

Answer 48

4, 2 on each wing

Question 49

Is there any asymmetrical protection within the flaps?

Answer 49

Yes, if flap segments differ by >5 degrees, brakes applied & flaps remain at current position

Question 50

How is STAB TRIM operated?

Answer 50

Electrically. | Split switch on control yoke operates 2 motors & jackscrew changing horizontal stabilizer AOI

Question 51

What systems can operate STAB TRIM?

Answer 51

CA trim switch FO trim switch Autopilot MACK trim

Question 52

What is priority of STAB TRIM control?

Answer 52

CA FO Autopilot MACH trim