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G4 Oral Study > Landing Gear > Flashcards

Landing Gear Flashcards

1
Q

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

A

º Provide sequencing, operation, monitoring, and indications for the landing gear
º Provide aircraft “In Flight” or “On the Ground” signals to other aircraft systems

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2
Q

When does the red arrow in the LND panel illuminate?

A

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

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3
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

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4
Q

What do the red UNLK lights indicate?

A

The landing gear is not locked in the selected position

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5
Q

What controls and manages all braking functions?

A

º Normal Brakes: Braking Steering Control Unit (BSCU)
º Alternate Brakes: Alternate Braking Control Unit (ABCU)

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6
Q

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

A

º Nosewheel steering deactivated
º Brake pressure is supplied by the Yellow hydraulic system
º Anti-skid is deactivated
º BSCU and ABCU are depowered
º A 1000 psi pressure limiting valve helps prevent wheel lock up

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7
Q

Which hydraulic systems provide pressure to the brakes?

A

º Normal brakes – Green
º Alternate brakes – Yellow backed up by a hydraulic accumulator

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8
Q

What are the four modes of braking?

A

º Normal braking
º Alternate braking with antiskid
º Alternate braking without antiskid (max brake pressure 1000 psi)
º Parking brake

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9
Q

When do the Autobrakes activate on landing if armed?

A

When the ground spoilers deploy

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10
Q

What is the difference between LOW and MED AUTO BRK?

A

º LOW - progressive pressure applied to brakes 4 seconds after ground spoilers deploy to decelerate at 5.6 FPS
º MED - progressive pressure applied to brakes 2 seconds after ground spoilers deploy to decelerate at 9.8 FPS

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11
Q

What does the AUTO BRK green DECEL light indicate?

A

Actual rate of deceleration is within 80% of the selected rate

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12
Q

What is the Takeoff setting for Auto Brakes?

A

MAX

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13
Q

What will cause the MAX AUTO BRK to activate on an RTO?

A

º Airspeed above 72 knots, and
º Thrust Levers at IDLE, and
º Ground spoiler extension

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14
Q

If you lose Green hydraulic pressure, will you have Auto Brakes?

A

No not with the alternate braking system

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15
Q

Is Anti-skid available with Alternate Brakes?

A

Yes, if certain conditions are met

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16
Q

With spoilers not armed will the spoilers deploy for an RTO?

A

Yes – when at least one engine is in reverse

17
Q

How many brake applications are available with accumulator pressure?

A

Approximately 7 full applications of brake pedals or parking brake or any combination thereof

18
Q

What does the BRAKES & ACCU PRESS triple indicator indicate?

A

º Yellow hydraulic pressure delivered to the left and right brakes
º Yellow system brake accumulator pressure

19
Q

When brake accumulator pressure is low, how is it recharged?

A

With the Yellow hydraulic system electric pump

20
Q

How do you verify the Parking Brake is set?

A

º ECAM PARKING BRK memo
º Triple indicator brake pressure

21
Q

If the parking brake is activated and no yellow hydraulic or accumulator pressure is available, do you still have
available braking?

A

Yes, via the brake pedals, but you must have green hydraulic pressure

22
Q

How we do charge the yellow system accumulators?

A

Pressing the yellow hydraulic electrical pump pushbutton

23
Q

What 3 things occur when you turn the Gravity Gear Extension hand-crank?

A

º Removes Green hydraulic pressure
º Opens gear doors
º Releases the uplocks

24
Q

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

A

º 3 clock-wise turns

25
Q

What hydraulic system supplies nose wheel steering?

A

Yellow

26
Q

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

A

+/-75 degrees

27
Q

When using the rudder pedals for steering, when does the steering angle begin to reduce?

A

Starts reduction at 40 knots and progressively reduces to zero degrees at 130 knots

G4 Oral Study (21 decks)

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