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Systems > Flight Controls > Flashcards

Flight Controls Flashcards

1
Q

What is the function of the spoilers?

A

To assist the ailerons in providing roll control

also operate as speedbrakes

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2
Q

What assists the elevators in providing pitch control?

A

A variable pitch horizontal stabilizer

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3
Q

What are the high lift devices for takeoff and landing?

A

Trailing edge flaps

leading edge slats

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4
Q

The primary flight control positions may be viewed where?

A

on the lower EICAS display when the STATUS mode is selected

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5
Q

How are the flight controls powered?

A

Hydraulically powered

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6
Q

What alternate way can the flaps and slats be operated?

A

Electrically by using the alternate flaps and slats drive system.

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7
Q

Is there manual reversion on this airplane?

A

No

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8
Q

How many FLT CONTROL SHUTOFF switches are there and where are they located?

A

6 on the accessory panel

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9
Q

How should the FLT CONTROL SHUTOFF switches be used and configured?

A

Use should only be done by maintenance and they are left ON for all flight operation.

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10
Q

What do the FLT CONTROL SHUTOFF switches control?

A

Hydraulic power to the tail and wing flight controls

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11
Q

FLT CONT VALS amber advisory msg means?

A

Two or more FLT CONTROL SHUTOFF valves are closed (off)

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12
Q

What provides flight control power incase of a dual engine failure?

A

RAT - Ram Air Turbine

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13
Q

Which hydraulic system is the RAT apart of?

A

Center hydraulic system

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14
Q

What are the indications that the RAT has deployed?

A

RAT UNLOCKED amber advisory msg

UNLKD switch light illuminates

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15
Q

What is the meaning of the green PRESS light on the RAT switch?

A

Adequate hydraulic power is provided for normal flight control operations.

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16
Q

What is the minimum speed the RAT needs to provide hydraulic power?

A

130 knots

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17
Q

Which hydraulic system powers the elevators?

A

Left, center, and right

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18
Q

If one control column jams, how can the jam be overided?

A

By applying force to the other column. Pitch control is then available using the free control column path.

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19
Q

How is pitch trim provided?

A

By varying the horizontal stabilizers angle

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20
Q

What can you use to set stabilizer trim?

A

Electric trim switches or alternate trim switches.

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21
Q

When will the white indicator band disappear on the stabilizer position indicators?

A

if there is a malfunction in the stabilizer position indicator other than a loss of power.

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22
Q

How many trim control modules position the stabilizer?

A

2

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23
Q

What do the stabilizer trim control modules use to set stabilizer trim?

A

Hydraulic power trim motors and brakes.

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24
Q

Trim rate varies with……….

A

Airspeed. As airspeed increases, trim rate decreases.

Inversely related

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25
Q

Which hydraulic systems are used to power the hydraulic stabilizer brakes and motors to trim the stabilizer?

A

Left and center

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26
Q

How many trim control modules does the auto pilot use and how does it compare from the normal rate?

A

1 and it trims at 1/2 the normal rate.

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27
Q

Which trim control module does the center A/P use?

A

Normally, left. It uses the right module if the left fails.

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28
Q

What happens when using the trim switches when a single A/P is in use?

A

The A/P disconnects.

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29
Q

What happens to the electric trim switches during autoland or go-around?

A

The electric trim switches are inhibited.

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30
Q

What can inhibit autopilot and electric trim switch signals to the stabilizer?

A

Any control column input opposing the direction of the stabilizer trim.

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31
Q

What happens to the stabilizer trim when the left and center hydraulics are lost in flight?

A

The Pitch Enhancement System, or PES, is automatically activated when the control column trim switches are used.

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32
Q

How does the PES(Pitch Enhancement System) work?

A

A hydraulic motor powered by the right hydraulic systems drives a pump which uses trapped left hydraulic system fluid to operate the stabilizer.

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33
Q

What is the trim rate of PES?

A

1/4 of the normal rate.

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34
Q

How is the PES activated?

A

Only by the control column trim switches.

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35
Q

What are the 3 EICAS msgs. related to pitch control non-normal?

A

STABILIZER (RED)
UNSCHD STAB TRIM (AMBER)
STAB TRIM (AMBER)

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36
Q

When will the RED WARNING switch, the RED STABILIZER msg, and the RED CONFIG light appear?

A

When the STABILIZER is not in the green band range for takeoff.

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37
Q

When will a UNSCHD STAB TRIM msg and caution light appear?

A

When the stabilizer moves without a trim signal or stabilizer movement is opposite of the direction signaled.

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38
Q

What does the STAB TRIM advisory msg mean and when will it appear?

A

Indicates a stabilizer trim fault exists and will appear when a brake fails to release or a motor fails.

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39
Q

What is the purpose of the STAB TRIM switches?

A

Controls hydraulic power for stabilizer trim. Control hydraulic SOV’s

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40
Q

What does a STAB TRIM switch do when it is move to CUT OUT?

A

Closes a hydraulic SOV and prevents the hydraulic power from releasing the brake and operating the motor.

41
Q

Which hydraulic systems power the rudder?

A

Left, Center, and Right hydraulic systems

42
Q

What is controlled by the ruder pedals?

A

Three hydraulic actuators which move the rudder.

43
Q

If one or two hydraulic systems are lost, will rudder control still be available?

A

Yes, but rudder displacement will be limited.

44
Q

What is the purpose of the Rudder Ratio Changer?

A

It varies rudder displacement base on airspeed to protect the structural integrity. The lower the speed the more displacement. The higher the speed the less the rudder will be displaced.

45
Q

What powers the Rudder Ratio Changer and actuator?

A

Left hydraulic system.

46
Q

When will the RUDDER RATIO msg appear?

A

When there is a fault with the rudder ratio changer or loss of left hydraulic system pressure.

47
Q

What happens to the left hydraulic system rudder actuator with a rudder ratio changer fault?

A

The left hydraulic system actuator automatically depressurizes to provide structural protection for the rudder.

48
Q

What are the limitations with a RUDDER RATIO msg?

A

No Auto-land
15 knot crosswind limit
Above 160 knots, avoid abrupt pedal input.

49
Q

What powers the Yaw Damper Systems?

A

Left and Center Hydraulic Systems

50
Q

What gives flight information to the Yaw Damper Controllers?

A

The IRS system

51
Q

How does a loss of one Yaw damper affect the Dampening authority?

A

1/2 of Yaw Dampening Authority is available.

52
Q

What provides roll control?

A

Hydraulically powered ailerons and spoilers.

53
Q

Which hydraulic systems power the ailerons?

A

Left, Center, and Right.

54
Q

How many actuators move each aileron?

A

2

55
Q

What will cause the inboard ailerons to droop?

A

Selecting flaps to 20.

56
Q

What flight controls assist the ailerons in roll control?

A

Six spoilers on each wing.

57
Q

How many actuators operate a spoiler panel?

A

One.

Each spoiler uses power from one of the 3 hydraulic systems.

58
Q

What prevents over controlling at cruise speed or high speeds?

A

Two spoilers on each wing are inhibited from responding to control wheel commands.
At high speeds an automatic aileron lockout system prevents operation of the outboard ailerons.

59
Q

What is the procedure if one control wheel becomes jammed?

A

Apply additional force to both wheels and it will disconnect the unjammed control wheel.

60
Q

AILERON LOCKOUT at cruise speed means?

A

One or more ailerons may not be in the locked position.

61
Q

AILERON LOCKOUT msg at approach speeds means?

A

One or both outboard ailerons failed to unlock.

62
Q

Spoiler panels serve as…..?

A

Inflight and ground speedbrakes.

63
Q

Inflight, what happens when the spoiler lever is moved to the up position?

A

All but two spoiler panels extend.

64
Q

What should be done to avoid buffeting when using the speedbrakes?

A

Avoid use with flaps greater than 5.

65
Q

What three conditions must be satisfied for Auto-Extension of the spoilers after landing?

A

Thrust levers idle
Hydraulic pressure to gear tilt actuators
Sensors detect airplane on the ground

66
Q

When will the spoiler panels automatically deploy with the spoiler handle in the down position?

A

When the three conditions are met and reverse thrust is applied on either engine.

67
Q

What are the two actions that will move the speedbrakes to the down position after landing?

A

Thrust levers out of idle

Or when the airplane senses a bounce it will move the spoilers to the armed position.

68
Q

What does the SPOILERS warning msg and lights indicate?

A

The spoilers are not in the down position for takeoff.

69
Q

SPEEDBRAKES EXT msg, caution light, and oral signal mean?

A

The speedbrake lever is moved passed the arm position:

  1. ) Below 800ft RA
  2. ) Flaps in landing configuration
70
Q

SPOILERS msg

A

One or more spoiler pairs have failed to operate as signaled.

71
Q

What capabilities are reduced with a SPOILER fault?

A

Reduced roll and speed control

Reduced capability of the auto speedbrake system

72
Q

AUTO SPEEDBRAKE msg

A

Indicates a fault in the automatic speedbrake system
In FLT: if speedbrake lever is in the ARMED position, may cause inadvertent speedbrake extension.
On GND: may result in the loss of automatic speedbrake extension.

73
Q

What type of power is used in normal operation of the flaps and slats?

A

Hydraulic Power

74
Q

What type of power is used in alternate operation of the flaps and slats?

A

Electrically Powered

75
Q

What happens when the Flap Lever is moved?

A

It send a signal to three Power Drive Units which move the flaps and slats to the selected position.

76
Q

Which hydraulic system provides power to the Power Drive Units?

A

Center hydraulic system

77
Q

What does each Power Drive Unit operate?

A

PDU 1.) Inboard Slats (mechanically linked)
PDU 2.) Outboard Slats (10)
PDU 3.) Trailing Edge Flaps

78
Q

Which flap positions do the Inboard Ailerons droop?

A

5,15, and 20

79
Q

Slat indication is only indicated in which flap position?

A

flaps 1

80
Q

The flap maneuvering speeds allow for how much bank before buffet?

A

The speeds allow for twenty five degrees angle of bank with a fifteen degree overshoot before the onset of buffet.

81
Q

Flaps 0 Maneuvering Speed

A

VREF30 + 8OKTS

82
Q

Flaps 1 Maneuvering Speeds

A

VREF30+60KTS

83
Q

Flaps 5 Maneuvering Speeds

A

VREF30+40KTS

84
Q

Flaps 15, 20 Maneuvering Speeds

A

VREF30+20KTS

85
Q

Flaps 25 Maneuvering Speeds

A

VREF25

86
Q

Flaps 30 Maneuvering Speed

A

VREF30

87
Q

Do not extend flaps or slats above what altitude?

A

20,000ft

88
Q

Flap Load Relief system is armed when you select which flap positions?

A

25 or 30

89
Q

When does the Flap Load Relief System activate and what happens?

A

The Flap Load Relief System activates when the flaps speed limit for flaps 25 or 30 is exceeded. It automatically retracts the flaps to position 20, or prevents flap extension to position 25 or 30.

90
Q

Using the alternate flaps system, how long does it take to go from flaps “up” to “20”?

A

3 mins

91
Q

What happens when the ALTN FLAPS LE & TE switches are pressed?

A

The LE and TE hydraulic SOV’s close and the electric motors are armed to provide power to their corresponding Power Drive Units.

92
Q

What precaution must you be aware of when using Alternate Flap System?

A

There is no Flaps Protection System available, so airspeed must be monitored not to exceed flap speed limits.

93
Q

The FLAPS warning msg combined with the WARNING and CONFIG lights indicate?

A

The flaps are not in the correct position for take-off.

94
Q

TE FLAP DISAGREE or LE SLAT DISAGREE msg combined with lights and CAUTION

A

Flaps or slats are not in or driving towards their commanded position.
Also, TE FLAP DISAGREE when the FLAP lever is out of any detent for any extended time.

95
Q

TE FLAP ASYM or LE SLAT AYSM msg and CAUTION

A

A TE flaps LE SLAT does not agree with its symmetrical pair. The TE Flaps or LE SLATs PDU automatically depressurizes.

96
Q

FLAP LD RELIEF msg and CAUTION

A

Indicates the flaps did not retract to 20 when the flap speed for 25 or 30 was exceeded.

97
Q

What are the primary flight controls?

A

ailerons, elevators and rudder

98
Q

Which flap drive system(s) have asymmetry protection?

A

Only the hydraulic drive system.

Systems (5 decks)

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