32 Landing Gear

Question 1

What are LGCIUs and how many are there?

Answer 1

Landing Gear Control and Interface Units

2 of them

Question 2

When do the LGCIUs swap over?

Answer 2

At the completion of a full cycle

i.e down and then back up again

Question 3

Which hydraulic system controls the gear and doors?

Answer 3

Green Hydraulics

Question 4

What happens when the gravity gear handcrank is turned?

Answer 4

Isolates the gear from the green system
Unlocks the gear doors
Allows gravity to drop the gear

Question 5

Which LGCIU is the landing gear indicator panel connected to?

Answer 5

LGCIU 1

Question 6

Which LGCIU provides information to the ECAM wheel page?

Answer 6

Both LGCIU 1+2

Question 7

How many green triangles on the ECAM page do you need to see to confirm the gear is down and locked?

Answer 7

1 triangle per gear

Question 8

What speed are the hydraulics cut off from the gear?

Answer 8

260kts

Question 9

When does the red arrow appear next to the landing gear lever?

Answer 9

When the get is not locked down and in landing config

Question 10

Which system supplies the nosewheel steering?

Answer 10

Yellow

Question 11

What is a BSCU

Answer 11

Brake and Steering Control Unit

Question 12

What is the maximum deflection from the tiller for the nose wheel?

Answer 12

75 degrees

Question 13

What steering angle can a tow bar give on the nose wheel?

Answer 13

95 degrees

Question 14

What hydraulic systems are the normal and alternate braking?

Answer 14

Normal is green

Alternate is yellow

Question 15

When does the BSCU change over?

Answer 15

At each down landing gear lever selection

Question 16

When is auto brake activated?

Answer 16

When ground spoilers extend

Question 17

What are the 4 braking modes?

Answer 17

Normal
Alternate WITH anti skid
Alternate WITHOUT anti skid
Parking brake

Question 18

How many applications can the alternate braking accumulator provide?
What PSI is it limited to?

Answer 18

7 full brake applications

Automatically limited to 1000PSI

Question 19

How could you pressurise the accumulators if they did not have sufficient pressure?

Answer 19

Using the yellow electric pump

Question 20

What happens when you switch the ANTISKID and nosewheel steering to off during loss of braking?

Answer 20

Switches the BSCU to the ABCU. Activating alternate braking mode.

Question 21

When is maintenance action required for hot brakes?

Answer 21

Difference on the same gear >150 and one gear is either 600 or 60
Brake temp 900 or higher
Fuse plug melted