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748 > Flight Controls > Flashcards

Flight Controls Flashcards

1
Q

Which primary Flight control surfaces do not require hydraulic power?

A

None.
-Redundantly powered from the four airplane hydraulic systems, no manual reversion.

FCOM 1 27.20.1

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2
Q

What is the purpose of the SHEAROUT mechanism in the control wheel system?

A

Allows operation of one control column in the other becomes jammed.

FCOM 1 27.20.1

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3
Q

How does the outboard elevator respond to pilot’s inputs?

A

Outboard elevator is controlled by the respective adjacent onboard elevator.

FCOM 1 27.20.2

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4
Q

Which hydraulic systems power the Elevator Feel Mechanism?

A

Systems 2 and 3.

FCOM 1 27.20.2

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5
Q

What is the effect on Elevator Feel force upon single or both hydraulic systems fail?

A

Single- no difference.

Both- lose feel force with airspeed (Mechanical springs provide feel force)

FCOM 1 27.20.3

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6
Q

How is the Stabiliser Trim System controlled and powered?

A

Trim actuator that is driven hydraulically by systems 2 and 3.

FCOM 1 27.20.5

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7
Q

How is Trim rate affected by airspeed?

A
  • Slow at high speed.

- Faster at low speed.

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8
Q

What are the differences of Alternate Trim input and Normal Trim input?

A

Alternate bypasses the YSM, no control column cutoff. No rate differential based on airspeed.

FCOM 1 27.20.6

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9
Q

Does takeoff thrust setting affect Stab Greenband calculation?

A

Yes

FCOM 1 27.20.5

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10
Q

How is the calculated greenband validated?

A

Calculated Greenband is crosschecked against the position of the nose gear oleo pressure switch.

FCOM 1 27.20.5

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11
Q

Under what conditions will the trim rate be halved?

A

When one of the hydraulic actuators fail (2 or 3)

FCOM 1 27.20.5

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12
Q

Does the STAB TRIM input from control when trim switches have higher priority than single autopilot input?

A

Yes, disengages autopilot.

Alternate trim will not disengage autopilot.

FCOM 1 27.20.6

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13
Q

How is UNCOMMANDED stabiliser motion stopped for Normal and Alternate Trim inputs?

A
  • Control column cutoff function.
  • Control column inputs in the opposite direction of stabiliser trim with will cutoff electric trim commands to the control modules (Normal Trim only).

FCOM 1 27.20.6

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14
Q

What is the purpose of the Stability trim and when does it operate?

A

Uses stabiliser trim to improve handling characteristics in the lower and higher speed ranges. Activating the stabiliser trim switches or engaging an autopilot inhibits stability trim.

FCOM 1 27.20.6

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15
Q

How are the ailerons and spoilers controlled?

A
  • Inboard Ailerons: Mechanically controlled and hydraulically powered.
  • Outboard Ailerons and Spoilers: Electronically controlled and hydraulically powered.

FCOM 1 27.20.8

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16
Q

Which spoilers respond to Control wheel movement?

A

All of them.
All spoiler panels operate with the ailerons.

FCOM 1 27.20.8

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17
Q

Within what airspeed range are the outboard ailerons operational for roll?

A

Below 258KT. Inhibited above this speed (held neutral).

FCOM 1 27.20.8

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18
Q

What is the function of the Rudder Ratio Changer and how many are installed?

A

2 installed.
Gradually reduces each rudder surfaces response to pedal inputs as IAS increases.

FCOM 1 27.20.10

19
Q

How are the rudder pedals affected by Rudder Trim operation?

A

They will be offset.

FCOM 1 27.20.10

20
Q

What happens when the Rudder Trim Centre Switch is pressed?

A

Causes Rudder Trim to return approximately back to zero units.

FCOM 1 27.20.10

21
Q

What happens when Rudder Ratio Changer fails?

A

“RUD RATIO DUAL OR SNGL”
Be cautious to limit rudder deflection at high IAS. It will remain in its failed range.

Reduced crosswind ability for both manual and automatic landings.

FCOM 1 27.20.10

22
Q

How many Yaw Damper systems are installed and when do they operate?

A

2 installed.

Operate continuously in flight.

FCOM 1 27.20.11

23
Q

Which hydraulic systems are used by the Yaw Dampers?

A

Systems 3 and 2 (upper and lower respectively)

FCOM 1 27.20.11

24
Q

How are the rudder pedals affected by yaw damper operation?

A

Rudder pedals will receive no input from yaw dampers.

FCOM 1 27.20.11

25
Q

What message is displayed when Yaw Damper is not operational?

A

INOPERATIVE light illuminates.

FCOM 1 27.20.11

26
Q

Which spoilers respond to Speedbrake Lever in normal flight?

A

2 inboard and 2 middle panels on each wing.

FCOM 1 27.20.13

27
Q

What are the conditions for ground spoiler automatic activation during normal landing?

A

Armed with thrust levers 1 and 3 near idle position or Reverse thrust.

FCOM 1 27.20.13

28
Q

What are the conditions for ground spoiler activation during rejected takeoff?

A

Armed with thrust levers 1 and 3 near idle.

Reverse thrust.

FCOM 1 27.20.13

29
Q

Which thrust levers must be advanced for automatic ground spoiler retraction during go-around?

A

1 and 3

FCOM 1 27.20.11

30
Q

What can happen if speedbrake System is armed when the SPEEDBRAKE AUTO message is displayed?

A

Inadvertent spoiler extension in Flight. Put Speedbrake in DOWN position.

FCOM 1 27.20.11

31
Q

The leading edges and trailing edges are separated into how many groups?

A
  • Leading edge: Outboard, Middle, Inboard.
  • Trailing edge: Outboard, Inboard.

FCOM 1 27.20.15

32
Q

What is the normal and alternate power source for the Leading Edge Flaps?

A

Pneumatic, Electric.

FCOM 1 27.20.15

33
Q

What is the normal and alternate power source for the Trailing Edge Flaps?

A

Hydraulic, Electric.

FCOM 1 27.20.15

34
Q

What is the function of Flap Control Units and how many are installed?

A

3 installed.
Sequences and monitors flap operation.

FCOM 1 27.20.15

35
Q

What are the flap protections available during Normal Mode of flap operation?

A

Asymmetric, Skew, Flap relief, uncommanded motion protection.

FCOM 1 27.20.15

36
Q

What are the flap protections available during secondary mode of flap operation?

A

All protections except flap load relief.

FCOM 1 27.20.15

37
Q

What are the flap protections available during Alternate Mode of flap operation?

A

No protection.

FCOM 1 27.20.16

38
Q

Under what situation would you use alternate flap?

A

FCU’s all inoperative.
Max flap setting 25.

FCOM 1 27.20.16

39
Q

How are the flaps operated using alternate control mode?

A

RET/EXT switch held until desired position (Same electrics and secondary mode)

(Flap lever becomes inoperative)

FCOM 1 27.20.16

40
Q

Which group of Leading Edge flaps are affected by reverse thrust operation and what is the EICAS indication?

A

Automatic retraction of Inboard, middle and one panel on each side Outboard of the outboard engine.

Leading edge flaps changes flap indicator to reflect flaps in transit. (F30 in magenta until reversers stowed).

FCOM 1 27.20.16

41
Q

Describe the flap operation when the flap lever is positioned from:

A. UP to the flaps 1 detent

B. Flaps 1 to 5 detent

A

A. leading edge flaps extend.

B. Leading edge flaps remain extended, Trailing edge flaps move to selected position.

FCOM 1 27.20.16

42
Q

Describe the flap operation when extending flaps in alternate mode. ( extend limit and sequencing)

A
  • All flaps extend immediately.
  • Leading edge flaps retract after Inbound Trailing edge Flaps.
  • Extend limit: 25

FCOM 1 27.20.16

43
Q

Is flap lever position indicated during Alternate mode?

A

No

FCOM 1 27.20.16

44
Q

Under what situations will the EICAS “STAB TRIM UNSCHD” message be displayed?

A
  • Unscheduled Stabiliser movement with no automatic cutout.
  • The Alternate stabiliser trim switches are used with an autopilot engaged.

FCOM 1 27.30.2

748 (18 decks)

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