Flight Controls

Question 1

What are the primary flight controls?

Answer 1

Aileron, elevator, and rudder.

Question 2

What are the secondary flight controls?

Answer 2

Flaps, spoilers, horizontal stab and gust lock.

Question 3

What does the Flight Control Electrical 1 (FCE#1) control?

FCE 2 controls Normal Pitch Trim and Spoilers

Answer 3

FCE 1 controls Pitch Trim Backup and Flaps

Question 4

What does the Flight Control Electrical 2 (FCE#2) control?

Answer 4

FCE 2 controls Normal Pitch Trim and Spoilers

Question 5

What are the flap position degrees and airspeed limitations?

Answer 5

Flap 1 is 8 degrees, 180 kts

Flap 2 and 3 are each 26 degrees, 170 kts

Question 6

What are the (3) names and functions of the spoilers?

Answer 6

1) Roll Spoiler – When the control wheel is rotated more than 30 degrees left or right, the spoiler on the respective side deploys, providing increased roll authority.
2) Ground Spoiler – increases drag and dump lift on landing and rejected takeoff to reduce required stopping distance.
3) Speed Brake – increases drag and dump lift while in the air; only available with flaps retracted

Question 7

Are the speed brakes available with flaps extended?

Answer 7

No

Question 8

What conditions must be met for ground spoilers to deploy?

Answer 8

1) aircraft on the ground (WOW)
2) thrust levers idle
3) ground spoilers armed
(Ground spoilers deploy to 35 degrees at approximately 1.2 seconds)

Question 9

What prevents the spoilers from opening further than their original position in the event of loss of hydraulic fluid?

Answer 9

A Hold-Down Lock Valve (HDLV).

Its purpose is to trap hydraulic fluid in the retract chamber of the PCU in the event of hydraulic fluid loss. It shuttles to the by-pass position allowing the check valve to close and block fluid from exiting the retract chamber or the PCU, thereby preventing the control surface opening further than its original position.

Question 10

If extended, at what airspeed will the speed brakes retract?

Answer 10

125kts.

Question 11

Will the speed brakes retract if the power is advanced?

Answer 11

Yes.

If the speed brakes are deployed, or open, and you advance the power, they automatically retract. A CAS message confirms speed brake retraction. Placing the speed brake switch to close extinguishes the CAS message.

Question 12

Describe the flaps.

Type?
Actuated how?

Answer 12

Four-position, four-panel trailing edge Fowler Flaps.

Mechanically actuated by jackscrews, which are powered by a DC electric motor.

The Flight Control Electronics (FCE) operates one Power Drive Unit (PDU) which drives 6 flexible shafts, which operate the flap actuators.

Question 13

What is the purpose of the Spring Loaded Rudder Booster system?

Answer 13

It provides force assistance to the pilot in case of thrust asymmetry by controlling the spring preload of two tension springs.

Question 14

The Spring Loaded Rudder Booster system will only be deactivated if at least one of these two conditions are met:

Answer 14

The system will only be deactivated if at least one of these two conditions are met:

• asymmetry between the engines equal to or lower than 250lbs
• airspeed equal to or lower than 50kts

Question 15

When is the Spring Loaded Rudder Booster system activated?

Answer 15

The FADEC sends a signal to command the SLRB actuator when the thrust asymmetry between the engines is greater than 500 lbs and the airspeed is greater than 60 kts.

Question 16

What besides the aircraft’s yaw damper provides yaw damping capability?

Answer 16

Ventral Rudder Surface.

Question 17

What lets you potentially dispatch with yaw dam inop?

Answer 17

Ventral Rudder Surface

Question 18

When is the ventral rudder surface actuated?

Answer 18

It’s automatically activated via air data inputs once airspeed reaches 60 KIAS on the takeoff run and any time the primary yaw damper is OFF. No direct interface with pilot.

Question 19

Which trims are commanded by the Trim Actuation System (TAS) through the trim panel?

Answer 19

Aileron and Rudder.

Question 20

Describe the 3 second timer on the roll trim and rudder trim.

Answer 20

After 3 seconds of continuous trimming, the actuator will not move, so it is necessary to release the switch before commencing trimming.
This warning system mitigates spontaneous or commanded movement of the trim surface beyond safe limits

Question 21

Where is the roll trim actuator installed?

Answer 21

On the left wing tip.

Question 22

How would roll or rudder trim failure be detected?

Answer 22

Switch activation will not move the trim tab; it will not function. There is no CAS message to indicate its condition.

Question 23

Where are the auto-tab surfaces located and what do they do?

Answer 23

The auto-tab surfaces are installed in the elevator surface trailing edge. The auto-tab surfaces are automatically deflected whenever there is an elevator surface deflection.