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9. CRJ 700/900 Flight Control System correctly answered to pass
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9. CRJ 700/900 Flight Control System correctly answered to pass
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9. CRJ 700/900 Flight Control Systemcorrectly answered to pass
What are the primary flight controls? - correct answer ✔✔- Ailerons
- Elevator
- Rudder
- Multi Function Spoilers (MFS)
What are the secondary flight controls? - correct answer ✔✔- Slats / Flaps
- Ground Spoilers
- Trim (Aileron, Rudder, Horizontal Stab)
- Multi Function Spoilers (MFS)
In the event of a total electrical power failure, how will the flight controls be powered? - correct answer
✔✔An Air Driven Generator (ADG) will power ACMP 3B
- pump 3B will hydraulically power the flight controls
How are the primary flight controls controlled? - correct answer ✔✔Network of pulleys, push/pull rods,
cables, and levers that transmit control inputs to hydraulic Power Control Units (PCUs)
Which spoilers are referred to as the "Spoilerons"? What about "Flight Spoilers"? - correct answer
✔✔Outboard = Spoilerons
Inboard = Flight Spoilers
Directional yaw of the aircraft is provided by the rudder and assisted by ___ _________ - correct answer
✔✔yaw damping
How many PCUs per aileron? - correct answer ✔✔2
, What function do the aileron PCUs provide on the ground? - correct answer ✔✔gust lock protection
How many PCUs per MFS? - correct answer ✔✔1
What is a flutter damper? - correct answer ✔✔shock absorbers that prevent aileron control surface
flutter when all hydraulic fluid is lost in flight
What do the flutter dampers provide on the ground? - correct answer ✔✔extra gust lock protection
What is the Roll Disconnect function? - correct answer ✔✔Pulling the ROLL DISC handle isolates the left
control wheel and associated cable system from the right system
- cross side aileron/MFS relationship (Pilot moves the left aileron and right MFS & vice versa for the
copilot)
What does pressing the ROLL SEL button after pulling the ROLL DISC handle do? - correct answer
✔✔Gives the pilot use of the spoileron function of the onside MFS
How many PCUs on the rudder? - correct answer ✔✔3
What is the purpose of the Rudder Travel Limiter (RTL)? - correct answer ✔✔used to prevent pilot from
over-stressing the rudder
- gradually decreases rudder travel from 33º to 4º as airspeed increases
What is the purpose of the Yaw Dampers (YD 1 & 2)? - correct answer ✔✔improve aircraft stability by
damping out oscillations in yaw
- operate independently of the AP
What will happen with failure of both yaw dampers? - correct answer ✔✔The AP will disengage
- atleast one YD must be engaged to engage the AP
How many PCUs per elevator? - correct answer ✔✔3
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