Flight Controls Flashcards
What are the primary flight controls?
Aileron, elevator, and rudder.
What are the secondary flight controls?
Flaps, multifunction spoilers, horizontal stab trim.
What does the Flight Control Electrical 1 (FCE#1) control?
FCE 2 controls Normal Pitch Trim and Spoilers
FCE 1 controls Pitch Trim Backup and Flaps
What does the Flight Control Electrical 2 (FCE#2) control?
FCE 2 controls Normal Pitch Trim and Spoilers
What are the flap position degrees and airspeed limitations?
Flap 1 is 8 degrees, 180 kts
Flap 2 and 3 are each 26 degrees, 170 kts
What are the (3) names and functions of the spoilers?
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
Are the speed brakes available with flaps extended?
No
What conditions must be met for ground spoilers to deploy?
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)
What prevents the spoilers from opening further than their original position in the event of loss of hydraulic fluid?
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.
If extended, at what airspeed will the speed brakes retract?
125kts.
Will the speed brakes retract if the power is advanced?
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.
Describe the flaps.
Type?
Actuated how?
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.
What is the purpose of the Spring Loaded Rudder Booster system?
It provides force assistance to the pilot in case of thrust asymmetry by controlling the spring preload of two tension springs.
The Spring Loaded Rudder Booster system will only be deactivated if at least one of these two conditions are met:
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
When is the Spring Loaded Rudder Booster system activated?
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.