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CRJ-900 Limitations > Flight Controls > Flashcards

Flashcards in Flight Controls Deck (28)
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1
Q

Which yoke is connected to the right aileron

A

First Officers

2
Q

Which yoke is connected to the left aileron

A

Captains

3
Q

How are the ailerons and rudder actuated

A

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.

4
Q

Which yoke controls the right elevator

A

First Officers

5
Q

Which yoke controls the left elevator

A

Captains

6
Q

What is the purpose of the Multifunction spoilers (MFS)

A

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

7
Q

Are the multifunction spoilers operational at any speed

A

Yes

8
Q

How are the MFSs controlled when used for roll assistance

A

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

9
Q

What is the flight deck indication of a jammed aileron cable

A

Both yokes will be jammed

10
Q

What happens after the Roll Disc handle is pulled

A

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

11
Q

How is the operable side selected

A

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

12
Q

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

A

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

13
Q

What is the flight deck indication of an aileron PCU runway

A

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

14
Q

What is occurring when the pilots trim the ailerons or rudder

A

The control surface is being repositioned there are no trim tabs

15
Q

What panels are part of the GND Lift dumping system

A

Inboard and outboard ground spoilers, all 4 MFS panels

16
Q

How are the flight controls gust locked

A

Hydraulic fluid is trapped during shutdown

17
Q

How is the Yaw Damper engaged

A

YD1 and YD2 engage switch light on the center pedestal

18
Q

How is the Yaw Damper disengaged

A

Disc button on the center pedestal

19
Q

What controls the yaw damper

A

The flight control computer

20
Q

Is it necessary to disconnect the yaw damper on landing

A

No

21
Q

How are the flaps operated

A

Electrically

22
Q

How many flap segments does the CRJ have

A

4 total, 2 on each wing

23
Q

Is there any asymmetrical protection within the flaps

A

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

24
Q

How is STAB TRIM operated

A

Electrically a split switch on the control yoke operates two motors and a jack screw changes the horizontal stabilizer angle of incident

25
Q

What system can operate the stab trim

A

CA s trim switches
FO s trim switches
Autopilot and Mach trim

26
Q

What is the priority for Stab Trim control

A

CA FO autopilot Mach trim

27
Q

SLATS move what degrees?

A

Move 2 positions 20 degrees and 25 degrees

28
Q

SLATS move when
Legacy CRJ900
Enhanced CRJ900

A

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