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A388 CBT EK Pre-Join > CBT - Braking > Flashcards

CBT - Braking Flashcards

1
Q

How many brakes does the A380 have and where are they located?

A

16 Carbon brakes

One brake per wheel on all WLG. and the fornt four wheels on the BLG

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2
Q

How many braking modes are there on the A380?

A

There are five braking modes:

* Normal braking

* Alternate braking

* Emergency braking

* Ultimate braking, and

* Parking brake.
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3
Q

What is the architecture of the Normal braking mode?

A
  • Green HYD controls WLG Brakes
  • Yellow HYD controls BLG Brakes
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4
Q

What is the architecture of the Alternate,Emergency,Ultimate braking modes?

A

Same layout as Normal but the G+Y hydraulic power is provided by the The Local Electro-Hydraulic Generation System (LEHGS) and associated accumulators.

There are two LEHGS. One for the WLGs and one for the BLGs

A LEHGS is an independent hydraulic generation system with their own reserviors

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5
Q

What computers conrol the braking system?

A

Two Braking Control Systems (BCS 1 and BCS 2)

They control the Normal and Alternate modes

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6
Q

What output does the BCS provide?

A
  • Triple pressure indicator
  • ECAM Wheel SD and alerts
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7
Q

What input does the BCS recieve?

A

Brake pedals
Auto Brake Panel (RTO pb and Rotary)
Landing gear lever

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8
Q

What input the Emergency Brake Control Unit (EBCU) recieve?

A

Brake Pedals (Emergency Mode)
Parking brake (Ultimate Mode)

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9
Q

Is there any performace or ability degradation between normal and alternate modes?

A

No

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10
Q

Other than the BCS what other computer controls the emergency braking system?

A

The Emergency Brake Control Unit (EBCU)

It controls both emergency and the WLG element of ultimate braking

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11
Q

When does the aircraft revert to emergency braking?

A
  • BCS 1 and BCS 2 are faulty, or
  • The A-SKID is faulty, or
  • The A-SKID sw is set to the OFF position, or
  • A LEHGS fails in alternate braking mode without A-SKID
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12
Q

What abilites are kept and what are lost with emergency braking in comparison to normal/alternate braking?

And how about the braking pressure?

A

Kept:
* If the LEHGS is available, the number of brake applications is not limited, if not then it is limited to the accumulator capacity
* Brake pedals and differential braking available

Lost:
* Autobrake
* Anti-Skid

Braking pressure is automatically limited to 1700psi in taxi/takeoff and 1000 in landing thus degrading the braking performance.

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13
Q

What is used for ultimate braking?

A

The flight crew use the parking brake handle to decelerate the aircraft.
No brake pedals, auto brake, anti skid.

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14
Q

What controls the ultimate braking mode?

A

EBCU on WLG
Parking Brake handle on the BLG

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15
Q

Is ultimate braking pressure automatically limited as in the sense of emergency braking?

A

Limited to 1700 on WLG by the EBCU
Not limited on the BLG

BLG tires may burst in ultimate braking application

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16
Q

What determines if the parking brake is in ultimate mode or parking brake mode?

A

The parking brake is controlled by:
* The PARK BRK handle on the BLGs if all engines are shut down, or
* The PARK BRK handle on the BLGs and the EBCU on the WLGs if at least, one engine is running at** N1 > 50 %.**

17
Q

This card summarizes the braking system modes

A
18
Q

What does the “ACCUS INFLATE” pb do?

A
  • Activate the BLG and WLG LEHGS, and
  • Pressurize the BLG and WLG brake accumulators

used when engines are not running and PRK BRK pressure is low

19
Q

What does the tripe pressure indicator indicate?

A

Upper part shows lowest pressure on the BLG Accumulators
Lower part shows L and R BLG brake pressures

20
Q

What does the braking system do when the gear is commande to retract after departure?

A

After takeoff, during the landing gear retraction, the WLGs and BLGs wheels are braked.

21
Q

How is Autobrake “DECEL” shown in RTO/Landing?

A

In PFD

22
Q

How is autobrake disarmed or deactivated?

A
  • Pressing the pedals
  • in flight > 10s after takeoff
  • LDG mode selector at disarm or crew push RTO pb again
  • Retracting ground spoilers after RTO or Landing
  • Pressing the A/THR instinctive disconnect pb on ground (doesnt apply for RTO)
23
Q

Card showing WHEEL SD page and highlighting the LEHGS

A
24
Q

What is shown in addtion to the normal WHEEL SD when selecting the WHEEL More SD page?

A
  • BCS 1, 2 and EBCU status
  • WLG ACCU PRESS
  • A-SKID indications
25
Q

What system monitors and relays alerts and data associated with brake temperature?

A

Brake Temperature Monitoring System (BTMS)

26
Q

What system monitors and relays alerts and data associated with brake pressure?

A

Tire Pressure Indicating System (TPIS)

27
Q

What system monitors and relays alerts and data associated with wheel steering?

A

Wheel Steering Control System (WSCS)

28
Q

Does BTV have ROW/ROP function as with other braking modes?

A

Yes

29
Q

For what landing configurations and runway conditions is BTV designed to operate?

A
  • CONFIG 3 and FULL
  • WET and DRY RWY
  • Whatever the wind/visibilit
  • Whatever LW
30
Q

How is BTV configured?

A

Using KCCU to select landing runway and exit on the OANS in Plan/Zoom mode. Then using the autobrake rotary knob to select BTV

31
Q

What does the DRY and WET lines on the BTW OANS display mean?

A
  • DRY: Dry RWY, MAX Braking, Idle Rev, Autoland ILS Approach
  • WET: Wet RWY, Max Braking and Rev, Autoland ILS Approach
  • Assumes a 400m Air distance from THR to TDZ

Shortest distance in above conditions

The lines are computed with FMS insterted data above 600 RA and actual data below 600 RA and displayed again in realtime adjusting to IRS G/S and long flares

32
Q

What are the values for turnaround time on the OANS?

And also what does said turnaround time mean?

A

Max vs Idle reversers turnaround time

Turnaround time is the time needed for brakes to naturally cool to 150ºC

33
Q

When does BTV disarm?

A
  • Pilot chooses another rwy or different exit
  • Pilot selects different rwy on FMS above 700 RA
  • Pilot changes rwy on fms below 700 RA (BTV will revert to BRK HI)
34
Q

What is the deceleration target of BTV?

A

to reach 10 kt at 65 m from the selected exi

35
Q

How does the dry/wet line indications change on touchdown and BTV activating?

A

A real time green stop bar shows on the ND

36
Q

What happens if BTV misses the requested exit?

A

BRK HI will be applied

37
Q

Can multiple braking modes be active at the same time?

A

Yes. Depending on the failure, each wheel group can be degraded separately, and can operate in a different braking mode

A388 CBT EK Pre-Join (20 decks)

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