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CRJ-900 Limitations > Flight Controls > Flashcards

Flashcards in Flight Controls Deck (28):
1

Which yoke is connected to the right aileron

First Officers

2

Which yoke is connected to the left aileron

Captains

3

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.

4

Which yoke controls the right elevator

First Officers

5

Which yoke controls the left elevator

Captains

6

What is the purpose of the Multifunction spoilers (MFS)

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

7

Are the multifunction spoilers operational at any speed

Yes

8

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

9

What is the flight deck indication of a jammed aileron cable

Both yokes will be jammed

10

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

11

How is the operable side selected

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

12

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

13

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

14

What is occurring when the pilots trim the ailerons or rudder

The control surface is being repositioned there are no trim tabs

15

What panels are part of the GND Lift dumping system

Inboard and outboard ground spoilers, all 4 MFS panels

16

How are the flight controls gust locked

Hydraulic fluid is trapped during shutdown

17

How is the Yaw Damper engaged

YD1 and YD2 engage switch light on the center pedestal

18

How is the Yaw Damper disengaged

Disc button on the center pedestal

19

What controls the yaw damper

The flight control computer

20

Is it necessary to disconnect the yaw damper on landing

No

21

How are the flaps operated

Electrically

22

How many flap segments does the CRJ have

4 total, 2 on each wing

23

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

24

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

25

What system can operate the stab trim

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

26

What is the priority for Stab Trim control

CA FO autopilot Mach trim

27

SLATS move what degrees?

Move 2 positions 20 degrees and 25 degrees

28

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