Landing Gear Flashcards Preview

A320 Notes > Landing Gear > Flashcards

Flashcards in Landing Gear Deck (53):
2

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?

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

3

What is indicated by the autobrake DECEL lights?

Airplane deceleration is 80% of selected rate.

4

The antiskid deactivates when ground speed is less than ...

20kts

5

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

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

6

What are the four braking modes?

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

7

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

250kts

8

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

12 hours.

9

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

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

10

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

+/- 6°

11

What is required to arm the auto brakes?

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

12

Landing gear operation is inhibited at speeds...

Above 260 +/- 5kts.

13

How does the antiskid work?

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).

14

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

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

15

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

75°

16

How long can the accumulator hold the parking brake pressure?

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

17

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

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.

18

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

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

19

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

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

20

When a crew member turns the crank it ....

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.

21

How many brake applications are possible with the brake accumulator?

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

22

What is the maximum nosewheel steering angle with the handwheels?

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

23

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

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

24

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

Three.

25

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

The nose wheel steering has been disconnected be ground personal.

26

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

The memo has become amber because one engine is running.

27

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

- Removes Green hydraulic pressure

- Opens gear doors

- Released the uplocks

28

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

3 clock-wise turns

29

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

- Provide sequencing, operation, monitoring, and indications for the landing gear

- Provide aircraft "In-Flight" or "On the Ground" signals to other aircraft systems

30

What hydraulic system powers the landing gear and doors?

Green

31

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

No

32

When does the red arrow in the LND panel illuminate?

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

33

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

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

34

What do the red UNLK lights indicate?

The landing gear is not locked in the selected position

35

What controls the LDG GEAR lights?

LGCIU 1

36

What controls and manages all braking functions?

The Brake and Steering Control Unit (BSCU)

37

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

- NWS deactivated

- Braking is powered by the Yellow hydraulic system

- Anti-skid is deactivated

38

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

Electrically activated

39

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

All other braking modes and anti-skid are deactivated

40

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

No

41

How do you verify the Parking Brake is set?

- ECAM PARKING BRK memo

- Triple indicator brake pressure

42

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?

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

43

What is the thrust limitation with the PARKING BRAKE ON?

Do not exceed 75% N1

44

What is the difference between LOW and MED AUTO BRK?

- 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

45

What is the Takeoff setting for Auto Brakes?

MAX

46

When do the Autobrakes activate on landing if armed?

When the ground spoilers deploy

47

Is Anti-skid available with Alternate Brakes?

Yes, if certain conditions are met

48

How many brake applications are available with accumulator pressure?

Approximately 7 full applications

49

What is the maximum brake temperature for takeoff?

300 degrees C

50

When should the brake fans be selected to ON?

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

51

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

+/- 75 degrees

52

What does the AUT BRK green "DECEL" light indicate?

Actual rate of deceleration is within 80% of selected rate

53

If LGCIU 1 fails will the lights still work?

Yes, as long as it's still powered

54

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

- Airspeed above 72 knots

- Thrust Levers at IDLE, and

- Ground spoiler extension