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E-Jet Systems > Flight Controls > Flashcards

Flight Controls Flashcards

1
Q

Secondary flight controls?

A
  • Horizontal stabilizer
  • Multifunction spoilers
  • Slats/flaps
  • Ground spoilers
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2
Q

How are the flight controls moved?

A

Fly by wire

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3
Q

What are the only controls not operated by fly by wire?

A
  • Ailerons only

* Operated by conventional cables

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4
Q

Which pitch trim switch has priority?

A

Captains side

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5
Q

Manual pitch trim commands are limited to what?

A

3 seconds

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6
Q

What happens if the slat/flap lever is placed at an intermediate position?

A

Flaps/slats remain in the last selected position

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7
Q

What does operating the pitch trim switch with the autopilot engaged cause?

A

The autopilot to disengage

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8
Q

What does pressing the flight control mode buttons do?

A

Places the associated flight system into direct mode

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9
Q

What does pulling the elevator or aileron disconnect handles do?

A

Isolates the captain and first officer’s control columns for elevator control and control wheel for aileron control

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10
Q

How many actuators does the rudder have?

A

2

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11
Q

How many actuators does the elevator have?

A

2

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12
Q

What is the pitch trim range?

A

2° to -13°

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13
Q

How many actuator controlled electronics (ACEs) are installed?

A

9

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14
Q

How many flight control modules (FCMs) are installed?

A

4

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15
Q

What is the purpose of the ACEs?

A

Connect the control column electronically to the respective control surface

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16
Q

What is the purpose of the FCM?

A

Provides software based assistance to the primary control electronics (P-ACE)

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17
Q

What is DIRECT mode?

A

The FCM is removed from the control loop and control limits the values set by the hardware in the P-ACE

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18
Q

What is DIRECT mode primarily the result of?

A

Loss of data from all FCM (no airspeed input) or multiple ACE failures

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19
Q

When will the PBIT expire?

A

After 50 hours since the last successful PBIT

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20
Q

Is there any crew action if the PBIT expires in flight?

A
  • No action required

* EICAS msg will only display after landing

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21
Q

When is the Electrical PBIT test accomplished?

A

Automatically after the plane is powered by any AC source

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22
Q

How long does the Electrical PBIT test take?

A

Approximately 3 minutes

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23
Q

What will interrupt the electrical PBIT test?

A
  • Any electric hydraulic pump turned on
  • If FCP switches are cycled
  • AC power is interrupted
24
Q

What does the hydraulic PBIT system test?

A

Tests the flight control actuators

25
Q

How long does the hydraulic PBIT test take?

A

Approximately 1 minute

26
Q

When is the hydraulic PBIT test activated?

A

Automatically when all 3 hydraulic systems are pressurized

27
Q

What will interrupt the hydraulic PBIT test?

A

If any flight control surface is moved

28
Q

How are the channels swapped for the control surfaces with more than 1 channel?

A

There is an odd/even day engage function

29
Q

What happens if there is a complete loss of power to the fly by wire system (FBW)

A

Dedicated backup battery takes over (lead acid)

30
Q

If RAT is the only source of electrical power, what happens to the flap speed?

A

Flaps and slats operate at half speed

31
Q

When the RAT is the only source of electrical power what are the flaps/slats limited to?

A

Flaps/slats limited to position 3

32
Q

In DIRECT mode are the ground spoilers available?

A

No

33
Q

During approach when will the speed brakes automatically retract?

A

Upon selecting flap/slat 2 or above

34
Q

Speed brakes will not deploy below what speed?

A
  • 180 kts

* Automatically retract if airspeed is reduced below that threshold

35
Q

When will speed brakes automatically retract on go around?

A

Thrust lever angle greater than 70°

36
Q

Are speed brakes available in DIRECT mode?

A

No

37
Q

How many degrees can the speed brakes deploy?

A

30°

38
Q

What is the difference between normal mode and direct mode?

A

No higher level functions available in direct mode

39
Q

What is the priority for the trim system?

A
  • Back-up
  • Captain
  • First officer
  • Autopilot
40
Q

What is the flap/slat extension/retraction sequence?

A
  • Slats extend first

* Flaps retract first

41
Q

Can a FCM override pilot input?

A

No, pilot has supreme control

42
Q

Primary flight controls?

A
  • Ailerons
  • Multifunction spoilers
  • Elevator
  • Rudder
43
Q

What are so me of the high level functions?

A
  • AOA limiting
  • Auto thrust compensation
  • Auto thrust compensation
  • Yaw damper and turn coordination
  • Rudder airspeed gain scheduling
44
Q

What is the electrical PBIT test testing?

A
  • Out of tolerance conditions
  • Failure in the FCM’s
  • Failure in the P-ACE’s
  • Failure in the SF-ACE’s
45
Q

What happens if the fly by wire loses all electrical power?

A

Backup system keeps the FBW system active for 15 minutes

46
Q

What is the backup system for the fly by wire controls

A

Dedicated lead acid battery charged by DC ESS bus 3

47
Q

How is the horizontal stabilizer controlled?

A

Electromechanical

48
Q

What are the elevator high level functions?

A
  • Gain on airspeed
  • Elevator thrust compensation
  • AOA limiting
49
Q

What happens if the elevator becomes jammed?

A

Elevator becomes fixed where the jam occurred and the pilot operates the opposite elevator

50
Q

Which rudder actuator does the captain/first officer control?

A
  • Captain - upper actuator

* First officer - lower actuator

51
Q

What happens if the rudder pedal assembly jams?

A

Rudder remains active and actuated by high level functions

52
Q

What happens if the rudder PCU actuator jams?

A

Rudder will be locked in the current position

53
Q

How many slats/flaps segments are there?

A
  • 4 slats per wing

* 2 flaps per wing

54
Q

If the flaps fail will the slats work and vice versa?

A

Yes

55
Q

What are slats/flaps limited to with the RAT deployed?

A

Flaps 3

E-Jet Systems (15 decks)

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