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Systems > Flight Controls > Flashcards

Flight Controls Flashcards

0
Q

What does the elevator disconnect do?

A

Splits the torque tube between ca and fo.

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1
Q

How are the elevators controlled?

A

Mechanically actuated with pulleys bell cranks cables and rods.

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2
Q

What side are the auto pilot servo and stick pusher connected too?

A

Captains

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3
Q

Where are the servo and spring tabs located?

A

Spring tab is inboard

Servo tab is the outboard.

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4
Q

Which way does the servo tab deflect?

A

Opposite the elevator

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5
Q

When is the spring tab used?

A

High speeds, moves opposite the elevator.

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6
Q

How is the pitch trim actuated?

A

Electrically moves the position of the horizontal stabilizer?

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7
Q

What trim switches actuates the trim?

A

Control wheel and back up on the instrument pedestal.

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8
Q

How many channels are on the horizontal stabilizer control unit?

A

2 each controlling a separate motor.

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9
Q

What protects from trim runaway?

A

3 second timer on the pitch trim actuator.

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10
Q

How is the aileron system controlled?

A

Mechanically controlled and hydraulically actuated

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11
Q

Where is the artificial feel unit located?

A

On the FO’s side.

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12
Q

Which hydraulic system supplies the ailerons?

A

Both systems supply both actuators

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13
Q

What happens in the event of complete hydraulic failure?

A

Ailerons revert to manual controlled.

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14
Q

How is roll trim accomplished?

A

Electomechanical actuator attached to the artificial feel unit and changes the neutral position of the ailerons.

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15
Q

Where is the roll trim button?

A

Instrument pedestal.

16
Q

What prevents roll trim runaway?

A

3 second timer on the actuator.

17
Q

How is yaw controlled?

A

Mechanically controlled and hydraulically actuated rudder.

18
Q

How are the rudders controlled?

A

Actuators move the forward rudder. The aft rudder moves by rods connected to the forward rudder. Moves up to 15 degrees.

19
Q

When are both rudder systems operating?

A

Below 135kts

Above 135kts rudder system 1 shuts down.

20
Q

What is rudder hard over protection?

A

The rudder system automatically shuts off when:
Rudder deflected above 5 degrees
Force above 130lbs to opposite rudder
Both engines above 56% N2

21
Q

How is yaw trim controlled?

A

Electomechanical actuator repositions neutral point of the rudder artificial feel unit.

22
Q

What prevents yaw trim runaway?

A

3 second timer on the actuator.

23
Q

How does the electromechanical gust lock work?

A

Locking pins hold the elevator in position.

24
Q

What type of flaps does the emb 145 have?

A

Double slotted fowler flaps

25
Q

How are the flaps controlled

A

Electrically powered, through the flap electronic control unit powering flap power and drive unit.

26
Q

How do the flaps move?

A

2 motors in the FPDU drive the flexible shaft which drives the flap actuators.

27
Q

What do flap transmission brakes do?

A

Prevent the flaps from being over loaded in the event of a jam. They lock the panel.

28
Q

What do velocity sensors do?

A

Measure the difference of the rotation of the flexible shafts.

29
Q

How are the spoilers controlled?

A

Hydraulically actuated and mechanically controlled. By the spoiler control unit.

30
Q

What hydraulic system supplies the spoiler?

A

Hydraulic system 2

31
Q

When will speed brakes open?

A

Speed brake lever in open position
Thrust levers below 50 degrees
Flaps 0 or 9 degrees

32
Q

When are ground spoilers deployed?

A

Airplane on the ground
Main gear above 25kts
TLA below 30 degrees and 56.4 N2

33
Q

What are the main components of the stall protection system?

A

2 angle of attack sensors
2 stick shaker actuators
1 stick pusher actuator

34
Q

What happens when a stall is sensed?

A

The stick shaker actuates and the autopilot disengages

35
Q

When is the stick pusher inhibited?

A 
0.5 g's
On the ground
Below 200'
Above 200kts
One channel inoperative

Systems (23 decks)

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