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Arkia A321 > Landing Gear & Brakes > Flashcards

Landing Gear & Brakes Flashcards

1
Q

To prevent exceeding VFE, a safety valve isolates the GREEN hydraulic supply above what speed?

A

260 kts

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2
Q

What hydraulic system powers the main gear?

A

GREEN

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3
Q

What hydraulic system and computer powers the NWS?

A

YELLOW and the Brake Steering Control Unit (BSCU)

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4
Q

What do the Landing Gear Control and Interface Units (LGCIU) do?

A

Control door and gear movement

Monitor gear and door positions through prox sensors

Gear info to ECAM

Sends gnd/flt signals to other aircraft systems

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5
Q

When do the Landing Gear Control and Interface Units (LGCIU) alternate control?

A

At the end of each cycle

OR

During failure

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6
Q

What are the 5 braking modes?

A

Normal

Alt with antiskid

Alt without antiskid

Accumulator only braking

Parking Brake

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7
Q

In the WHEELS pages what do the triangles represent?

A

LEFT = Landing Gear Control and Interface Units (LGCIU) 1 sensor

RIGHT = Landing Gear Control and Interface Units (LGCIU) 2 sensor

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8
Q

What is the action item when GEAR UPLOCK is displayed?

A

Do NOT raise the gear lever

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9
Q

What does a GREEN ARC on the BRAKES page represent?

A

Brake temp >100C

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10
Q

What does a AMBER ARC on the BRAKES page represent?

A

Brake temp >300C

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11
Q

What does the REL stand for?

A

Brakes Released

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12
Q

What does the N/W STEERING amber indication on WHEEL SD mean?

A

Failure of nosewheel steering system

Failure of both BSCUs

Low Yellow pressure

A/SKID and N/W STGR switch selected off

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13
Q

What does the ANTI SKID label on WHEEL SD mean?

A

Amber:
Both BSCU channels fail
A/SKID and N/W STGR switch selected off
Antiskid Failure
Low Yellow pressure
Green:
autobrake, normal braking, or alternate braking failure, and antiskid still available

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14
Q

What does the NORM BRK label on WHEEL SD mean?

A

GREEN = Auto and Alternate brakes failure

AMBER = Loss of Normal Braking from BSCU failure or low Green pressure

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15
Q

What does the ALTN BRK label on WHEEL SD mean?

A

GREEN = Alternate braking available, normal and anti-skid failure

AMBER = Alternate braking failure

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16
Q

How are the Landing Gear Position indicators signaled?

A

LGCIU 1 ONLY

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17
Q

When and only when will MAX autobrakes be selected?

A

TO only

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18
Q

What does the A/SKID & N/W STRG switch do?

A

Provides power to both BSCUs

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19
Q

What system powers the parking brake?

A

YELLOW

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20
Q

What system powers the wheels brakes?

A

GREEN

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21
Q

When is NORMAL BRAKING available?

A

GREEN pressure available
A/SKID & N/W STRG switch is ON
At least one BSCU channel functioning

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22
Q

When in the Green arc, how long can the parking brake provide pressure?

A

12 hours

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23
Q

How would you pressurize the YELLOW system for the parking brake?

A

Yellow Electric Pump

*get ground clearance first

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24
Q

What do Brake Pressure gauges represent?

A

Parking Brake (yellow) pressure

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25
Q

What 2 systems are essential for an aborted TO?

A

Auto Brakes and Spoilers

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26
Q

When will Auto Brakes engage during a rejected TO?

A

Spoilers activated

Thrust to IDLE

MAX auto brakes apply auto with spoiler activation

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27
Q

What is the steering limit of the rudder pedals?

A

6 degrees either direction

gradually reduced at 40 knots to 0 at 140

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28
Q

What does AUTO/BK LO do?

A

Activates 4 seconds after ground spoiler extension

1.7 m/sec deceleration

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29
Q

What does AUTO/BK MED do?

A

Activates 2 seconds after ground spoiler extension

3 m/sec deceleration

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30
Q

When will DECEL light activate?

A

80% target rate

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31
Q

How do you deactivate auto brakes?

A

Turn off AUTO/BRK pb

Apply pressure to at least one brake pedal (both for MAX)

Retract ground spoilers

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32
Q

When would you call mx for abnormal brake temp after landing?

A

> 600C

<60C

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33
Q

When would Alternate Braking with AntiSkid be active?

A

Low Green Pressure

*no AutoBrakes

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34
Q

When would Alternate Braking withOUT AntiSkid be active?

A

Low Green Pressure

Loss of BSCU

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35
Q

When would Accumulator only braking be used?

A

Low GREEN and YELLOW Pressure

Accumulator provides 7 full brake applications on YELLOW system

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36
Q

When would the RED arrow illuminate next to the Gear Selector?

A

Gear not down and locked at 750 AGL

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37
Q

Why would recycling the gear help a gear problem?

A

Recycling the gear switches to the other LGCIU

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38
Q

What if only one Green gear indicator is present?

A

This is sufficiant to conclude that the gear is down

However, the doors will not close

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39
Q

What other systems are unavailable with the loss of both LCGIUs?

A

Thrust Reversers

GPWS

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40
Q

What other systems are unavailable with the loss of both BSCUs? Or turning off the A/SKID & N/W STRG switch.

A

Nosewheel Steering

Normal Braking

Antiskid

Autobrakes

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41
Q

How is gravity extension achieved? And what happens to the doors?

A
  • When a crew turns the cranko It isolates the landing gear hydraulics from the green hydraulic systemo Unlicks the LG doors + gearso Allows gravity to drop the gear into extended position.- The gear doors remain open for the rest of the flight.
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42
Q

On the GEAR panel what is indicated by a red UNLK light? What is the information source?

A
  • UNLK (red) if the gear is not locked in the selected position.- Panel is connected to LGCIU1, receives signals from proximity detectors.
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43
Q

How many green triangles (on the SD) confirm that the gear is locked down?

A

1

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44
Q

When on take-off, does N.W. steering become inhibited?

A
  • Until 80kts for hand wheels- Until 130kts for rudder pedals.
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45
Q

How much N.W. Steering is available through: Rudder Pedals / Steering Hand wheel?

A

Rudder pedals: +/- 6 degreesSteering hand wheel: +/- 75 degrees

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46
Q

What happens to the Nosewheel Angle if both pilots make simultaneous movements of the rudder or steering hand wheel?

A

Orders added algebraically summed.

47
Q

What happens when the button on a steering hand wheel is pressed?

A

Removes control of nose wheel steering from the rudder pedals.

48
Q

When is NW STRG DISE amber? When is it green?

A
  • Amber if one engine is running- When in the towing position (no engine running)
49
Q

When does AUTOBRAKE automatically disarm?

A

T/O: 10secs lift offLDG: spoilers.Taxi: brake pedals- Flight crew presses the p/b switch- One or more arming conditions is lost.- Enough deflection to brake pedal.- After T/O and touch and go.

50
Q

What triggers AUTOBRAKE system operation?

A
  • At the command for ground spoilers extension for LO and MED made.- At the command for ground spoilers extension and airspeed is above 40kts, for MAX mode.
51
Q

How long can the accumulator hold the park brake on?

A

At least 12 hours.

52
Q

With PARK BRAKE set, is Pedal Braking operative?

A

If the parking brake is activated and no yellow hydraulic or accumulator brake pressure is available, then the normal braking system can be applied via the brake pedals.

53
Q

When does the DECEL light illuminate?

A

Comes on when 80% of decal rate achieved.

54
Q

What delays occur in LO, MED & MAX before braking starts?

A

LO – 4secs after spoilers deploymentMED – 2secs after spoilers deploymentMAX – immediately

55
Q

MAX autobrake is only used when?

56
Q

When the ECAM says “L/G – GRVTY EXTN” what should you do?

A

Use the QRH and apply the following procedure:- Crank must be turned approximately 3 revolutions.- Once the gears are down, select lever to down position to lock position.

57
Q

What is indicated by vertical amber lines, showing each side of the a wheel number, on the SD?

A

Brake released fault.

58
Q

What is indicated by a green / amber arc on the SD?

A
  • The green arc appears on the hottest wheel when one brake temp exceeds 100 degrees.- Becomes amber, with an ECAM caution, when corresponding brake temperature exceeds 300 degrees.
59
Q

With HOT indicated, what must be delayed?

A
  • Parking brake, T/O.- Delay T/O until temperature below 300 degrees without fans, or 150 degrees with fans.
60
Q

What are the limiting speeds for a) tyres (groundspeed) b) gear up / down selection c) gear locked down d) safety valve operation?

A

a) 195ktsb) 220 / 250ktsc) 280kts, M.67d) 260kts

61
Q

Maximum brake pressure if ANTI-SKID is inoperative?

62
Q

You are ready to taxi. You apply the toe brakes on the rudder pedals and release the PARK BRK. The BRAKES pressure falls to zero. What should you do?

A

Nothing as this is normal. The brakes pressure indicator only indicates alternate (yellow) brake pressure.

63
Q

What is indicated by the autobrake DECEL lights?

A

Airplane deceleration is 80% of selected rate.

64
Q

The antiskid deactivates when ground speed is less than …

65
Q

There are two triangles for each gear on the ECAM WHEEL page. What do they represent?

A

Each triangle represents the position detected by one of the two computer systems.

66
Q

What are the four braking modes?

A

Normal braking alternate braking with antiskid alternate braking without antiskid and parking brake.

67
Q

What is the maximum speed at which the landing gear may be extended?

68
Q

The parking brake accumulator is designed to maintain the parking pressure for at least …

69
Q

How do you interpret the green arc shown over a wheel indication on the WHEEL page?

A

It marks the hottest brake with a temperature of more than 100°C.

70
Q

What is the maximum nosewheel steering angle with the rudder pedals?

71
Q

What is required to arm the auto brakes?

A

Green hydraulic pressure available, anti-skid, no failures in the braking system.

72
Q

Landing gear operation is inhibited at speeds…

A

Above 260 +/- 5kts.

73
Q

How does the antiskid work?

A

The speed of each main gear wheel (given by a tachometer) is compared to the aircraft speed (reference speed). When the speed of a wheel decreases below approximately 0.87 times (depending on conditions) reference speed brake release orders are given to maintain the wheel slip at that value (best braking efficiency).

74
Q

What is the meaning of the green arc above the wheel symbol on the wheel page?

A

The green arc appears on the hottest wheel when one brake temperature exceeds 100°C.

75
Q

The steering handwheels which are interconnected can steer the nose wheel up to …

76
Q

How long can the accumulator hold the parking brake pressure?

A

The accumulator maintains the parking pressure for at least 12 hours.

77
Q

What is the function of the Landing Gear Control and Interface Units (LGCIUs)?

A

The LGCIUs control the sequencing of gear and doors electrically. One LGCIU controls one complete gear cycle then switches over automatically to the other LGCIU at the completion of the retraction cycle. It also switches over in case of failure.

78
Q

What would occur if you switch off at the A/SKID & NW STRG?

A

The nose wheel steering is lost anti-skid is deactivated and the yellow hydraulic system supplies the brakes.

79
Q

You perform a landing with the AUTO/BRK set to MED. After touch down what triggers the AUTO/BRK?

A

AUTO/BRK starts when the ground spoilers extend and sends a progressive pressure to the brakes.

80
Q

When a crew member turns the crank it ….

A

Isolates the landing gear hydraulics from the green hydraulic system unlocks the landing gear doors unlocks the main and the nose gear allows gravity to drop the gear into the extended position.

81
Q

How many brake applications are possible with the brake accumulator?

A

Accumulators are designed to supply at least seven full brake applications.

82
Q

What is the maximum nosewheel steering angle with the handwheels?

A

The handwheel can turn the nosewheel up to 75° in either direction.

83
Q

What is the meaning of the amber arc above the wheel symbol on the wheel page?

A

The green arc becomes amber and an ECAM caution appears when the corresponding brake temperature exceeds 300°C.

84
Q

How many turns are required on the gravity extension hand crank to extend the landing gear?

85
Q

What does the NW STRG DISC memo mean on the E/WD?

A

The nose wheel steering has been disconnected be ground personal.

86
Q

During push back you start engine no. 2. You observe that the NW STRG DISC memo has changed to amber. Why?

A

The memo has become amber because one engine is running.

87
Q

What 3 things occur when you turn the Gravity Gear Extension handcrank?

A
  • Removes Green hydraulic pressure- Opens gear doors- Released the uplocks
88
Q

How many turns of the Gravity Gear Extension handcrank does it take to lower the gear manually?

A

3 clock-wise turns

89
Q

What is the function of the 2 Landing Gear Control and Interface Units (LGCIU)?

A
  • Provide sequencing, operation, monitoring, and indications for the landing gear- Provide aircraft “In-Flight” or “On the Ground” signals to other aircraft systems
90
Q

What hydraulic system powers the landing gear and doors?

91
Q

Is normal hydraulic power available to the gear after Emergence Landing Gear Gravity Extension?

92
Q

When does the red arrow in the LND panel illuminate?

A

Below 750’ RA, when the aircraft is in the landing configuration and the landing gear is not locked down

93
Q

What happens if your airspeed is 280 knots and you place the landing gear lever to DOWN?

A

Nothing- A safety valve shuts off hydraulic power to the landing gear system when airspeed is above 260 knots

94
Q

What do the red UNLK lights indicate?

A

The landing gear is not locked in the selected position

95
Q

What controls the LDG GEAR lights?

96
Q

What controls and manages all braking functions?

A

The Brake and Steering Control Unit (BSCU)

97
Q

What happens when you switch the A/SKID and N/W STRG to OFF?

A
  • NWS deactivated- Braking is powered by the Yellow hydraulic system- Anti-skid is deactivated
98
Q

How is the parking brake activated when you turn ON the Parking Brake switch?

A

Electrically activated

99
Q

What effect does setting the Parking Brake have on other braking modes?

A

All other braking modes and anti-skid are deactivated

100
Q

Is it required to depress the brake pedals while setting the parking brake?

101
Q

How do you verify the Parking Brake is set?

A
  • ECAM PARKING BRK memo- Triple indicator brake pressure
102
Q

If during an engine start with the parking brake ON, the aircraft starts to move due to a parking brake failure, what must you quickly do?

A

Release the PARKING BRAKE handle to restore Normal braking with the pedals

103
Q

What is the thrust limitation with the PARKING BRAKE ON?

A

Do not exceed 75% N1

104
Q

What is the difference between LOW and MED AUTO BRK?

A
  • LOW: progressive pressure applied to brakes 4 seconds after ground spoilers deploy to decelerate at 5.6 FPS- MED: progressive pressure applied to brakes 2 seconds after ground spoilers deploy to decelerate at 9.8 FPS
105
Q

What is the Takeoff setting for Auto Brakes?

106
Q

When do the Autobrakes activate on landing if armed?

A

When the ground spoilers deploy

107
Q

Is Anti-skid available with Alternate Brakes?

A

Yes, if certain conditions are met

108
Q

How many brake applications are available with accumulator pressure?

A

Approximately 7 full applications

109
Q

What is the maximum brake temperature for takeoff?

A

300 degrees C

110
Q

When should the brake fans be selected to ON?

A

5 minutes after brake temperatures exceed 300 degrees C or just before stopping at gate, whichever occurs first

111
Q

The steering hand wheels can steer the nose wheel up to how much in each direction?

A

+/- 75 degrees

112
Q

What does the AUT BRK green “DECEL” light indicate?

A

Actual rate of deceleration is within 80% of selected rate

113
Q

If LGCIU 1 fails will the lights still work?

A

Yes, as long as it’s still powered

114
Q

What will cause the MAX AUTO BRK to active on a RTO?

A
  • Airspeed above 72 knots- Thrust Levers at IDLE, and- Ground spoiler extension

Arkia A321 (23 decks)

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