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A330/350 Systems > A330 Landing Gear > Flashcards

A330 Landing Gear Flashcards

1
Q

What system controls the ldg gear and doors?

A

Landing Gear Control Interface Unit (LGCIU)

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2
Q

How are the landing gears controlled and operated?

A

Electrically controlled

Hydraulically operated

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3
Q

To which landing gears is anti-skid fitted?

A

To the main ldg gear only.

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4
Q

What does the shortening mechanism do?

A

It retracts the shock absorber of the main ldg gear into the leg to allow the gear to be retracted into the bay.

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5
Q

What does the pitch trimmer do?

A
  • It ensures the bogie is in the correct position for retraction.
  • It also damps the movement of the bogie.
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6
Q

Which direction does the nose ldg gear retract?

A

Forward

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7
Q

Which way does the pitch trimmer set the bogie?

A

Front wheel up

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8
Q

When does the LGCIU cycle?

A
  • At the end of a ldg gear retraction cycle.

- in the event of one LGCIU failure

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9
Q

Which hydraulic systems operates the ldg gears and doors?

A

Green

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10
Q

In which position does the ldg gear selector have to be in, when doing a gravity extension procedure on the A330? Why?

A
  • Down

- To open the safety valve upstream of the gravity extension valve and allow green hydraulic fluid to pass.

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11
Q

Wich LGCIU controls the ldg gear down and locked indicators?

A

LGCIU 1

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12
Q

In case of ldg gear gvty extension, what are some impacts to the operation?

A
  • Ldg gear doors remain down, increased fuel consumption

- Nose wheel steering is lost

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13
Q

If you select ldg gear lever down and after a few seconds you don’t get the green down and locked indication, what would you do?

A
  • Check the wheel SD page (information from LGCIU 1&2)
  • Recycle ldg gear lever
  • Ldg gear gvty extension
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14
Q

If you only see one green light after gear extension, what does this mean?

A
  • All ldg gear down and locked
  • Double check SD page
  • Possible broken indicator lights
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15
Q

If the ldg gear is selected up, how are the wheels stopped from spinning?

A
  • MLG by normal brake system

- NLG by brake band in bay

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16
Q

When does the red down arrow next to the ldg gear lever illuminate?

A
  • 750ft on approach

- ldg gear not down and locked

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17
Q

After ldg gear gvty extension, can the gear be retracted again?

A
  • If green hydraulic pressure is available and

- If the ldg gear gvty selector has been RESET and set to OFF

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18
Q

There are two gvty extension selectors. Which one needs to be selected to DOWN for the gear to extend?

A

Both

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19
Q

When is the wheel SD page displayed?

A
  • On ground after, engine running, before takeoff, disappears at TO power
  • On approach, ldg gear selection
  • Below 800ft with gear still up
  • Disappears at engine shut down
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20
Q

When does the L/G CTL indication appear on the SD?

A
  • After a 30sec time delay if

- the position of any ldg gear disagrees with the lever position. (ECAM triggered)

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21
Q

Which hydraulic system does the NWS use on the A330?

And on the A350?

A
  • Green

- Yellow

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22
Q

What system controls the NWS?

What inputs does it receive?

A
  • Brake and Steering Control Unit (BSCU)

- Steering Tiller, Rudder Pedals, Autopilot

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23
Q

How many degrees can the NWS be turned with rudder pedals?

A

Maximum of 6 degrees, reducing with increased taxi speed.

24
Q

How many degrees can the NWS be turned with the steering tiller?

A

Maximum of 72 degrees reducing with increased taxi speed.

25
Q

Up to what speed do the rudder pedals have authority on the NWS on takeoff?
And on ldg?

A
  • 150kts takeoff

- 100kts ldg

26
Q

Up to what speed does the steering handwheel provide inputs to the NWS?

A

Below 100kts

27
Q

When does the NWS TOWING FAULT light illuminate?

A

NWS steering angle has exceeded 93 degrees.

28
Q

The N/WS DISC is shown in green on the SD, what does this mean?

A

The NWS lever is in the towing position.

29
Q

The N/WS DISC is shown in amber on the SD, what does this mean?

A
  • The NWS lever is in the towing position

- One engine has started

30
Q

Which hydraulic system does the normal braking system use?

A

Green

31
Q

Which hydraulic system does the alternate baking system use?

A

Blue

32
Q

What modes of braking are there?

A
  • Normal braking
  • Alternate braking
  • Auto-braking
  • Anti-skid
33
Q

When do the BSCU change over?

A
  • On ldg gear lever down selection

- When one BSCU fails

34
Q

What protection is in place for tire overheat?

A

Fusible plugs

Brake cooling,if installed

35
Q

What does the anti-skid system do?

A
  • Prevents tires from skidding by
  • releasing brakes when tires slow down below a certain speed
  • Allows more maximum braking
  • Prevents Aquaplanning
36
Q

When does auto-brake activate?

A
  • When the spoilers are deployed (above 72kts) in LO and MED modes
  • When the spoilers are deployed (72kts) and wheel speed above 40kts for MAX mode
37
Q

If you have to reject a takeoff at low speeds, will the auto-brake work?

A
  • If rejected below 72kts, spoilers don’t deploy

- Auto-brake doesn’t activate

38
Q

How is the auto-brake disarmed?

A
  • Pressing the pb
  • losing one or more arming conditions
  • pressing brake pedals
  • after takeoff or touch and go
39
Q

What braking modes are there?

A
  • Normal braking
  • Alternate braking with anti-skid
  • Alternate braking without anti-skid
  • Park brake
40
Q

Which systems are operative in normal braking?

A
  • Anti-skid

- Auto-brake

41
Q

Which systems are operative in alternate braking with anti-skid?

A
  • Anti-skid
42
Q

When does alternate braking occur?

A
  • Green system insufficient pressure

- Blue system takes over

43
Q

Which systems are operative in alternate braking without anti-skid?

A
  • No auto-brake

- No anti-skid

44
Q

When does alternate braking without anti-skid occur?

How are the brakes supplied?

A
  • B and G system low pressure

- Accumulator only

45
Q

In alternate braking without anti-skid what pressure limit is set on the brakes and how many applications does the accumulator give?

A
  • 1000 PSI

- 7 full brake applications

46
Q

Which systems is the park brake supplied by?

A
  • Blue hydraulic system

- Accumulator

47
Q

For how long does the accumulator maintain pressure on the park brake?

A

12 hrs

48
Q

If the engines are off and the blue hydraulic system is not powered, how can the park brake be set?

A

By pressing the brake pedals and setting the park brake lever.

49
Q

Which auto-brake mode is usually selected for takeoff?

A

MAX

50
Q

Which auto-brake mode is usually selected for ldg?

A

LO or MED

51
Q

When does the green DECEL light illuminate?

A

When at least 80%of the selected deceleration rate is achieved?

52
Q

You touch down, select reversers and start decelerating. You don’t see the green DECEL light. Why?

A
  • The 80% deceleration rate hasn’t been achieved
  • Can take up to 8(5) seconds to appear for LO(MED) brake selectiono
  • May not be achieved on slippery rwys
53
Q

If the park brake lever is left at half position between ON and OFF, what does this mean?

A

Park brake is not on (Only on in actual ON position)

54
Q

What does the symbol “III” indicate on the wheel SD page?

A

Anti-skid

55
Q

What does the green arc on top of one of the wheels on the wheels SD page mean?
What if it’s amber?

A
  • It indicates the hottest brake if one brake exceeds 100 degrees.
  • One wheel brake temp exceeds 300 degrees
56
Q

What is TPIS?

A

Tyre pressure indicating system

A330/350 Systems (8 decks)

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