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Suppe > 9 Flight Controls > Flashcards

9 Flight Controls Flashcards

1
Q

The primary flight controls

A
  1. Elevators
  2. Ailerons
  3. Rudder
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2
Q

The primary flight controls are powered by:

A

Rudundant hydraulic system. There is no manual reversion

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3
Q

The secondary flight controls

A
  1. Movable horizontal stabilizer
  2. Spoilers
  3. Leading and trailing edge flaps
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4
Q

Spoilers operate differentially…

A

to assist ailerons for roll control and symmetrically as speedbrakes

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5
Q

How many guarded flight control shutoff switches are there to control hydraulic power to the ailerons, spoilers, elevators and rudder?

A

6 guarded flight control switches
3 for L, C, R WING HYD VAL*
3 for L, C, R TAIL HYD VAL*
*EICAS advisory message

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6
Q

If two or more OFF lights illuminate (Flight control shutoff). Which EICAS advisory message would be displayed?

A

FLT CONT VALS

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7
Q

If a jam occurs in a column or wheel, the pilots can maintain control by?

A

The columns and wheels are connected through jam override mechanisms. If a
jam occurs in a column or wheel, the pilot’s can maintain control by applying
force to the other column or wheel to overcome the jam.
NOTE: When a restricted portion
of the flight controls are bypassed, some control effectiveness may be lost.

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8
Q

How are the rudder pedals connected

A

The rudder pedals are rigidly connected between the two sides.

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9
Q

What does the speedbrake lever allow?

A

The speedbrake lever allows manual or automatic symmetric actuation of the
spoilers.

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10
Q

Pitch control is provided by:

A
  1. Two elevators
  2. A moveable horizontal stabilizer
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11
Q

Roll control is provided by:

A
  1. Four ailerons
  2. Twelve spoilers
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12
Q

Yaw control is provided by:

A

By a single rudder

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13
Q

Flaps and slats provide:

A

High lift for takeoff, approach and landing

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14
Q

Symmetric spoilers are used as:

A

Speedbrakes

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15
Q

How does the elevator operate

A

Moving the control column signals hydraulic actuators to move the elevators.

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16
Q

Are the pilots able to see the elevator positions?

A

Yes on the EICAS status display. Separate pointers
indicate the left and right elevator deflection. A full–scale indication corresponds
to the maximum elevator deflection.

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17
Q

How does the pilot feel the forces on the elevators?

A

Two elevator feel systems provide artificial feel forces to the pilot’s control
columns. Mechanical springs provide feel following a loss of the left and center
hydraulic systems.

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18
Q

The stabilizer is powered by which hydraulic systems?

A

The Left and Center hydraulic systems

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19
Q

How many modules are the to control the stabilizer?

A

Two. One for each stabilizer
hydraulic source.

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20
Q

How many modes are there for stabilizer trim control?

A

Three
1. Electric
2. Alternate
3. Automatic

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21
Q

Dual electrical pitch trim switches are located where?

A

On the control wheel
Note: Must be pushed simultaneously to command trim changes

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22
Q

Can the electric trim be used in the full range of the stabilizer trim?

A

No. The alternate trim system must be used to set the stabilizer trim to less than 1.5
units with the flaps up.

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23
Q

Alternate trim control is provided by?

A

The alternate stabilizer trim switches on the
control stand.

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24
Q

Alternate trim control provide:

A

An increased range of stabilizer travel

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25
Q

In relation to the other methods of trimming, when pushing both alternate trim switches simultaneously:

A

The signals neutralize any other
conflicting trim inputs.

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26
Q

How is the automatic stabilizer trim controlled?

A

The stabilizer is controlled automatically by the autopilot or by a Mach speed trim
system when the autopilots are not engaged.

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27
Q

The automatic Mach speed trim system can be inhibited by?

A

The Electric,
alternate, or autopilot trimming which inhibits the Mach speed trim system

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28
Q

The Mach speed trim system improves:

A

Speed stability by trimming the stabilizer as airspeed changes.

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29
Q

Does the Automatic stabilizer trim use both trim control modules?

A

No, it uses only one trim control module and trims at one–half
the electric or alternate trim rate.

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30
Q

If a single autopilot is engaged, electric trimming causes:

A

The autopilot to
disengage.

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31
Q

If multible autopilots are engaged, electric trimming causes:

A

Nothing. The electric trim will then be inhibited

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32
Q

What impact will the operation of the alternate trim system have on the autopilot when engaged?

A

Nothing. Alternate trimming does not cause autopilot disengagement.

33
Q

UNSCHED STAB TRIM means?

A

Uncommanded stabilizer motion os detected.
OR
Alternate trim is used with an autopilot engaged.

34
Q

How can you remove all hydraulic power from the stabilizer?

A

By placing both (Left and Center) stabilizer cutout swithes in the CUTOUT position.

35
Q

STAB TRIM means?

A

The electric stabilizer trim rate is one–half the normal control wheel
stabilizer trim switch rate.

36
Q

Pitch control are controlled by the Left and Center hydraulic system. What will happen if both systems is lost in flight?

A

The Pitch Enhancement System (PES) will automatically activate.

37
Q

How does the Pitch Enhancement System (PES) function?

A

A hydraulic motor in the right
system driving a pump which uses trapped left trim system fluid to operate the
stabilizer.

38
Q

With Pitch Enhancement System (PES) activated. How do you trim?

A

With the electric trim. Alternate and automatic trim will be inoperative.
NOTE: Trim is available at approximately 1/4 the normal rate.

39
Q

Aileron surface deflections are proportional to?

A

Control wheel displacement

40
Q

How does spoliers help with roll control?

A

Spoilers begin to extend to agument roll controll after several degress of control wheel rotation.

41
Q

What happens with the ailerons while selecting flaps?

A

The inboard ailerons droop in conjunction with trailing endge flap extension.

42
Q

How does the pilot feel the forces on the ailerons?

A

Control wheel forces increase as control displacement increases.

43
Q

Are the pilots able to see the aileron positions?

A

Yes on the EICAS status display. A full–scale indication corresponds
to the maximum aileron deflection.

44
Q

How does the aileron trim work?

A

Dual aileron trim switches located on the aft aisle stand must be pushed
simultaneously to command trim changes.
Hydraulic power from one of the three
hydraulic systems is necessary to accurately set aileron trim.

45
Q

What happens if aileron trim is commanded with the autopilot engaged?

A

The repositioning of the aileron neutral point will not be apparent to the
crew. When the autopilot is disengaged, the control wheels and ailerons
move to the new (possibly undesired) neutral point and the airplane will
roll proportional to the amount of trim input.

46
Q

What is the purpose of the aileron lockout control system?

A

To permit full travel of the outboard ailerons at
low speeds and lock out the outboard ailerons at high speeds.

47
Q

AIL LOCK means?

A

The aileron lockout actuator disagrees with the
commanded position. At high airspeeds it may indicate that one or both of the
outboard ailerons failed to lockout. When the message and light appear at low
airspeeds it may indicate that one or both of the outboard ailerons failed to unlock.

48
Q

How many yaw dampers are installed?

A

Two yaw dampers which operate through the
rudder control system to improve directional stability.

49
Q

Are the pilots able to see the rudder position?

A

Yes on the EICAS status display. A full–scale indication corresponds
to the maximum rudder deflection.

50
Q

How does the deflection of the rudder vary with different airspeeds?

A

With the rudder ratio changer. As airspeed increases the ratio changer desensitizes these
inputs from the pilot to reduce the rudder deflection.

51
Q

How does the rudder ratio changer function?

A

It receives inputs from the air data computer and provides control commands to an actuatior powered by the left hydraulic system. The actuator then dampens the pilot’s inputs to the rudder.

52
Q

RUDDER RATIO means?

A

Rudder ratio system is failed. Rudder structural protection is provided by automatic depressurization of the left
hydraulic system actuator which limits rudder displacement at high airspeeds.
However, abrupt rudder pedal input should be avoided at high airspeeds. At low
airspeeds the two remaining rudder actuators provide sufficient control for full
rudder displacement.

53
Q

If the left hydraulic system is providing normal presure to the rudder ratio changer, a fault may result in?

A

Limited displacement of the rudder at all airspeeds. This
requires that crosswind and auto land limitations be observed.

54
Q

L or R YAW DAMPER means?

A

The respective yaw damper is inoperative.

55
Q

When the spoilers are ARMED. When will the spoiler panels fully extend?

A
  1. Landing gear fully on the ground (not tilted)
  2. Thrust levers at idle
56
Q

With the speedbrake lever at DOWN position and the aircraft on the ground. Can the spoiler panels extend fully?

A

Yes, when either reverse thrust lever is moved to the reverse idle detent.

57
Q

SPEEDBRAKES light means?

A

Speedbrakes are extended when radio altitude is 800 feet or below or the flaps are in landing position.

58
Q

SPEEDBRAKES EXT means?

A

Together with master caution lights and beeper sounds, all these activate when SPEEDBRAKES light illuminates.

59
Q

AUTO SPEEDBRAKE means?

A

A fault is detected in the automatic
speedbrake system which may result in the loss of automatic speedbrake
extension.

60
Q

If the speedbrake lever is armed, the AUTO SPEEDBRAKE/ AUTO SPDBRK message and light can result in?

A

An inadvertent speedbrake extension in flight. The speedbrake lever
should be returned to the DOWN position.
The speedbrakes can still be operated
manually.

61
Q

How are flap and slat positions indicated?

A

Flap and slat positions are indicated by two pointers in the flap position indicator.
There are L and R pointers for the left and right wing flaps and slats. The right
pointer is normally hidden from view by the left pointer.

62
Q

Which flap positions are takeoff flap positions?

A

5, 15 and 20

63
Q

Which flap positions are landing flap positions?

A

25 and 30 (20 is used for some non-normal landing conditions)

64
Q

Selection of flaps 1 commands?

A

The slats to move to the midrange position. The flaps remain retracted.

65
Q

Selection of flaps 5, 15 or 20 commands?

A

The flaps to move to the position selected. The inboard ailerons droop in conjunction with flap extension.
The slats remain in the midrange position.

66
Q

Selection of flaps 25 commands?

A

Both the flaps and slats to move to landing
positions.

67
Q

Selection of flaps 30 commands?

A

The flaps to extend to the primary landing
position.

68
Q

How many flap gates are there?

A

Two. One at flaps 20, preventing inadvertent retraction of the flaps past the go-around position, and at flaps 1 prevnting inadvertent retraction of the slats

69
Q

How does the Flap Load Relief system work?

A

If the flap airspeed placard limit is exceeded with the flaps in the 25 or 30 position,
the flaps automatically retract to position 20.
When airspeed is reduced, the flaps automatically re–extend.

70
Q

Which flap protection systems are not available when the alternate mode is used?

A
  1. Flap load relief
  2. Trailing edge flap asymmetry protection
71
Q

Slat and flap operation time in the alternate mode:

A

Is greatly increased

72
Q

Alternate mode
flap and slat extension is limited procedurally to:

A

Flap 20

73
Q

When the hydraulic driven generator is supplying electrical power:

A

Hydraulic flow
to the slats and flaps is reduced, resulting in increased slat and flap operating time.

74
Q

LE SLAT DISAGREE means?

A

The leading edge slat positions disagree with
commanded position.

The disagree indicates that the slats are not driving toward their new commanded
position.
may also occur if the flap lever is not in a detent for an
extended period of time. In this case, the light and message can be removed by
moving the flap lever to the desired detent.

75
Q

LE SLAT ASYM means?

A

Leading edge slats are not symmetrically
extended. Hydraulic power to the slats is automatically shut off.

Trailing edge flaps extension is inhibited until the slats extend to position 1.
Therefore, if a slat asymmetry occurs between the UP and 1 positions, the flap
indicator may not move until flaps 5 or greater is selected.

76
Q

TE FLAP DISAGREE means?

A

The trailing edge flap positions disagree
with commanded position.

The disagree indicates that the flaps are not driving toward their new commanded
position.
May also occur if the flap lever is not in a detent for an
extended period of time. In this case, the light and message can be removed by
moving the flap lever to the desired detent.

77
Q

TE FLAP ASYM means?

A

The trailing edge flaps are not symmetrically
extended. Hydraulic power to the flaps is automatically shut off.

78
Q

FLAP LD RELIEF means?

A

The flap load relief system fails to operate when required.

Suppe (16 decks)

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