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From Flashcardlet > FCOM VOL2 Flight controls > Flashcards

FCOM VOL2 Flight controls Flashcards

0
Q

Switching FLT control switch off does what?

A

Closes the flight control shutoff valve isolating ailerons, elevator and rudder from associated hydraulic system pressure.

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1
Q

What does switching the FLT control switch to stby rud do?

A

Activates standby hydraulic system pump,

Opens the standby rudder shut off valve to pressurise the standby rudder power control unit.

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2
Q

What does the FLT control low pressure light indicate?

When is it deactivated?

A

Indicates low hydraulic system (a or b) pressure to ailerons elevator and rudder.

Light is deactivated when associated FLT control switch is selected to stby rud and the stby rudder shut off valve opens.

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3
Q

What do flight spoiler switches do?

A

Used for maintenance purposes.
On- normal
Off- closes associated flight spoiler shutoff valve.

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4
Q

Yaw damper light illuminates when?

A

yaw damper not engaged.

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5
Q

Yaw damper switch on does what?

A

Engages main yaw damper to main rudder control power unit if FLT control switch B is on.
Engages the standby yaw damper to the standby rudder control unit if both FLT control switches A and B are in the standby rud position.

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6
Q

When is the standby hydraulic system light activated?

When is light armed?

A

When standby hydraulic system fluid is low.

Light is always armed.

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7
Q

What does the low pressure light on standby panel indicate?

When is the light armed?

A

When the standby hydraulic system pressure is low

Armed only when standby pump operation has been selected or automatic standby function has been activated.

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8
Q

When is the STBY RUD ON light illuminated?

A

When standby rudder system has been commanded on to pressurise the standby rudder power control unit.

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9
Q

Switching the alternate flaps master switch to arm does what?

A

Closes the TE flaps bypass valve,
activates the standby pump and
Arms the alternate flaps position switch.

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10
Q

Can the alternate flaps postion switch retract the flaps?

A

Trailing edge only

Leading edge flaps remain deployed.

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11
Q

What happens when alternate flap switch is pushed down momentarily?
What happens when switch is held down?

A

LE devices fully extend, using standby hydraulic pressure.

Holding switch electrically extends TE flaps until switch is released.

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12
Q

When is the FEEL DIFF PRESS light armed?

What does it mean when it is illuminated?

A

Armed when trailing edge flaps are up or down.

Illuminated Amber when excessive differential pressure sensed in the elevator feel computer.

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13
Q

What can cause excessive differential pressure?

A

Erroneous activation of the elevator feel shift module.

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14
Q

What is indicated by speed trim fail light?

A

Failure of the speed trim system.

If it illuminates on recall indicates a failure of a single FCC Chanel

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15
Q

Amber Mach trim fail light indicates?

A

Failure of Mach trim system.
If it illuminates on recall indicates failure of single FCC Chanel.
Fly max 280kts/M.82

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16
Q

Amber auto slat fail light?

A

Failure of auto slat system?

On recall indicates failure of a single stall management/yaw damper computer (SMYD)

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17
Q

What happens when the stab trim “ main electric” is switched to cutout?

A

Deactivates trim stabiliser switch operation.

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18
Q

What happens when stab trim “Auto pilot” switch is moved to cutout?

A

Deactivates auto pilot stabiliser trim operation,

Disconnects auto pilot if engaged

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19
Q

What does the stab trim override switch do I. Override?

A

Bypasses the control column actuated Trim switches to restore power to stabiliser trim switches.

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20
Q

Stab out of Trim light indcates?

A

Autopilot is not trimming stabiliser properly.

Armed only when autopilot is engaged.

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21
Q

When is the speed brake do not arm light deactivated?

A

When speed brake lever is down.

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22
Q

When is the the speed brake do not arm light illuminated Amber?

A

Indicates abnormal condition or test inputs to the automatic speed brake system.
On landing wheel spin is less than 60kts and speed brake lever is not in the down position.

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23
Q

When will the Amber speed brake lever extended light illuminate in flight?

A

Speed brake lever is beyond the armed position and
TE flaps extended more than 10 or
Rad alt below 800ft.

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24
Q

On ground when will Amber speed brake lever extended light illuminate?

A

If speed brake lever is in the down detent,

Ground spoilers not stowed.

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25
Q

Which trailing edge flap positions arm the flap load relief system?

A

All flap positions from 10-40

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26
Q

What TE flap positions are the LE devices fully extended?

A

Flap 30-40

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27
Q

Which flight controls can be manually operated if reqd?

A

Elevator and ailerons?

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28
Q

How is the rudder powered with loss of hydraulic system A and B?

A

Standby hydraulic system.

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29
Q

What speed does the rudder become effective?

A

40-60kts

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30
Q

What do the blended winglets achieve?

A

Enhanced performance, extended range and increased fuel efficiency.

31
Q

Which power control unit does the captains control wheel control?

A

Connected by cables to the aileron PCU.

32
Q

Which PCU is the FO’s control wheel connected to?

A

Connected by cables to the spoiler PCU.

33
Q

If ailerons are jammed how is roll control provided?

A

Force applied to FO’s control wheel will operate spoilers for roll control.

34
Q

How many flight spoilers on each wing?

Which hydraulic system are they powered by?

A

4 on each wing,

Each wing has 2 flight spoilers powered by each hydraulic system.

35
Q

What controls movement of horizontal stabiliser?

A

Trim either autopilot or manual.

36
Q

After elevator control breakout which control column is the useable one?

A

The control column that moves freely.

Higher forces due to friction, much less elevator travel but enough for landing flare.

37
Q

What does the elevator feel system do?

A

Provides simulated aerodynamic forces using airspeed from the elevator pitot system and stabiliser position.
Feel is transmitted to the control column by the elevator feel and centreing unit.

38
Q

What causes the feel diff press light to illuminate?

A

When either hydraulic system fails or the elevator pitot system fails excessive differential pressure is sensed causing light to illuminate.

39
Q

The elevator feel computer uses which hydraulic system?

A

Either A or B whichever is higher.

40
Q

When is Mach trim automatically accomplished?

A

Above M.615

41
Q

Purpose of Mach trim system?

A

Provide speed stability at higher Mach numbers.

42
Q

When does the stabiliser trim operate in high speed mode?

A

With flaps down

43
Q

What are the control column stab trim cutout switches?

Can this be overridden?

A

Stop stab trim when control column forces oppose trim direction.
Yes with the stab trim override switch in override. This allows trim to operate regardless of control column position.

44
Q

What does the speed trim system do?

A

Provides stability during low gross weights aft c of g and high thrust settings during manual flight.

45
Q

What are the reqmnts for the speed trim system to operate?

A

10 seconds after t/o, 5 seconds after trim switch released, above 100kts below Mach.68, autopilot disengaged sensing of trim reqmnt.

46
Q

What does the sts do?

A

As a/c accelerates or decelerates away from trimmed speed it commands elevator to return to trimmed speed.
This is why there is increased elevator forces as you accelerate after t/o.

47
Q

Which 3 systems work together to help pilot identify a stall?

A

Speed trim system, elevator feel shift system and yaw damper.

48
Q

During a stall what does the elevator feel shift module do?

A

Increases forward control column force to approx 4 times normal.
I.E less force reqd for more movement.

49
Q

Elevator feel shift is always armed apart from when it is inhibited, when is it inhibited?

A

On ground, RA below 100ft or autopilot engaged.

If efsm is active during descent below 100ft RA then it will remain active until stall condition is fixed.

50
Q

What does the speed trim system do approaching a stall?

A

Trims forward away from stick shaker.

I.e makes it harder to pull back

51
Q

When is hydraulic pressure reduced from main rudder PCU? How much is it reduced by?

A

Above 135kts, reduced by 25%. This is to reduce effective ness of rudder pedals.

52
Q

What does the force fight monitor system do?

A

It is located in main rudder PCU.
If hydraulic pressure a or b input is jammed or disconnected the FFM will automatically - switch on standby rudder pump
- open the standby rudder shutoff valve to pressurise the standby rudder PCU.
- illuminate the stand by Rudd on, and master caution flight control lights.

53
Q

How many yaw dampers are there? How are they controlled?

A

2, main and standby.

Managed through stall management/ yaw damper (SMYD)computer.

54
Q

During normal ops what hydraulic system does the yaw damper use?

A

B

55
Q

What will cause the yaw damper to switch off

A

SMYD senses a yaw damper system fault,
SMYD senses yaw damper does not respond to a command,
B flight control switch is positioned to off or standby rudder.

56
Q

What can power the yaw damper during manual reversion?

A

If yaw damper is switched on, the standby system will power the yaw damper

57
Q

How many ground spoilers are there and which hydraulic system powers them?

A

4, hyd sys A

58
Q

When will the auto speed brake system operate?

A 
Speed brake lever is in armed position,
Speed brake armed light is illuminated,
Rad alt below 10ft,
Compression on a ldg gear strut. ( any for flight spoilers, right strut for ground spoilers)
Both thrust levers idle.
Both wheels spin up to 60kts.
59
Q

With the speed brake lever in the down position for landing or RTO when will it operate automatically?

A

When both wheels are above 60kts, both thrust levers are retarded, reverse thrust selected.

60
Q

What do the leading edge devices consist of?

A

Four flaps and eight slats,
2 flaps on each inboard wing
4 slats on each wing outboard of engine.

61
Q

Which flap settings increase lift, lift and drag?

A

Increase in lift - flaps 1-15

Increase in lift and drag- flaps 15- 40

62
Q

How does the flap load relief system work?

A

For flaps 10-40 if airspeed exceeds flap limit by 1kt flaps will retract to lower flap setting, will not extend back to selected flap setting until speed is 4kts below flap limit.
I.E if flap40 is selected and speed increases to 163kts flaps will retract to flap 30 and not extend until speed is 158kts or below.

63
Q

When do the leading edge flaps fully extend?

A

When flap 1 or above is selected.

64
Q

When do the leading edge slats fully extend?

A

They are extended in stages up until flap 25. Fully extend from flap 30 and above.

65
Q

What hydraulic system normally powers the auto slats?

What is the back up?

A

Hydraulic system B, back up is the system A through the power transfer unit
( when loss of pressure from the B system is sensed then the power transfer unit uses system A pressure to power a hydraulic motorised pump to pressurise system B pressure allowing auto slats to work).

66
Q

When does the auto slat system work?

A

When TE flaps are selected 1-25 the slats are extended, as the a/c approaches the stall angle the auto slats extend fully to enhance stall characteristics.

67
Q

What extends the alternate flaps?

A

Le devices extended by standby hydraulic pressure.
Te flaps extended electrically.
Note: no asymmetry or skew protection with the electric driven system.

68
Q

What is flap asymmetry?

A

When a device on one wing does not align with the same device on the other wing.

69
Q

What is a skew condition?

A

Occurs when symmetrical TE flaps do not operate at the same rate causing a twist during extension or retraction

70
Q

What unit protects against flap asymmetry and skew conditions?

A

The FSEU or flap slat electronic unit.

71
Q

What happens when the FSEU detects an TE asymmetry or skew?

A

Closes the TE flap bypass valve,

Displays the split on the position indicator, showing position of left and right TE flaps.

72
Q

What happens when the FSEU detects am improper position in the leading edges?

A

LE transit light will remain illuminated

73
Q

What is considered uncommanded motion on the LE devices?

How does it stop it?

A

When two or more Le flaps on one wing move or two or more LE slats on one wing move.
It shuts down the LE control and illuminates the Amber Le transit light.

74
Q

How does the FSEU protect against uncommanded motion during cruise?

A

Pressurises retract lines and depressurises the extend and fully extend lines.

75
Q

What is considered an uncommanded motion on the TE flaps?

How does it stop it?

A

Moves away from commanded position,
continues to move after reaching commanded position,
moves in opposite direction to that it was commanded to do.
Closes the trailing edge flap bypass valve.
Cannot be reset in air, use alternate flaps.
Shutdown is shown by flap position different to lever position, no split.

From Flashcardlet (20 decks)

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