LANDING GEAR

Question 1

1 | What is the function of the two Landing Gear Control and Interface Units (LGCIU)? [ FCOM-DSC-32-10-10 ]

Answer 1

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

Question 2

2 | When does the red arrow in the LND panel illuminate? [ FCOM-DSC-32-10-40, FCOM-DSC-32-10-50 ]

Answer 2

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

Question 3

3 | What happens if your airspeed is 280 knots and you place the Landing Gear lever to DOWN?
[ FCOM-DSC-32-10-10 ]

Answer 3

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

Question 4

4 | What do the red UNLK lights indicate? [ FCOM-DSC-32-10-40 ]

Answer 4

º The landing gear is not locked in the selected position

Question 5

5 | What controls and manages all braking functions? [ FCOM-DSC-32-30-10 ]

Answer 5

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

Question 6

6 | What happens when you switch the A/SKID & N/W STRG to OFF? [ FCOM-DSC-32-30-10, FCOM-DSC-32-30-20 ]

Answer 6

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

Question 7

7 | Which hydraulic systems provide pressure to the brakes? [ FCOM-DSC-32-30-10 ]

Answer 7

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

Question 8

8 | What are the four modes of braking? [ FCOM-DSC-32-30-10 ]

Answer 8

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

Question 9

9 | When do the Autobrakes activate on landing if armed? [ FCOM-DSC-32-30-10 ]

Answer 9

º When the ground spoilers deploy

Question 10

10 |What is the difference between LOW and MED AUTO BRK? [ FCOM-DSC-32-30-20 ]

Answer 10

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

Question 11

11 |What does the AUTO BRK green DECEL light indicate?
[ FCOM-DSC-32-30-20 ]

Answer 11

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

Question 12

12 |What is the Takeoff setting for Auto Brakes? [ FCOM-DSC-32-30-20 ]

Answer 12

º MAX

Question 13

13 |What will cause the MAX AUTO BRK to activate on an RTO? [ FCOM-DSC-32-30-10, FCOM-DSC-27-10-20 ]

Answer 13

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

Question 14

14 |If you lose Green hydraulic pressure, will you have Auto Brakes? [ FCOM-DSC-32-30-10 ]

Answer 14

º No, not with the Alternate Brake system

Question 15

15 |Is Anti-skid available with Alternate Brakes? [ FCOM-DSC-32-30-10 ]

Answer 15

º Yes, if certain conditions are met

Question 16

16 |With spoilers not armed will the spoilers deploy for an RTO?
[ FCOM-DSC-27-10-20 ]

Answer 16

º Yes – when at least one engine is in reverse

Question 17

17 |How many brake applications are available with accumulator pressure? [ FCOM-DSC-32-30-10 ]

Answer 17

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

Question 18

18 |What does the BRAKES & ACCU PRESS triple indicator indicate? [ FCOM-DSC-32-30-20 ]

Answer 18

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

Question 19

19 |When brake accumulator pressure is low, how is it recharged? [ FCOM-DSC-32-30-10 ]

Answer 19

º With the Yellow hydraulic system electric pump

Question 20

20 |How do you verify the Parking Brake is set?
[ FCOM-DSC-32-30-20 ]

Answer 20

º ECAM PARKING BRK memo
º Triple indicator brake pressure

Question 20

21 |If the parking brake is activated and no yellow hydraulic or accumulator pressure is available, do you still have
available braking? [ FCOM-DSC-32-30-10 ]

Answer 20

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

Question 21

22 |How we do charge the yellow system accumulators? [ FCOM-DSC-32-30-10 ]

Answer 21

º Pressing the yellow hydraulic electrical pump pushbutton

Question 22

23 |What 3 things occur when you turn the Gravity Gear Extension hand-crank?
[ FCOM-DSC-32-10-40 ]

Answer 22

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

Question 23

24 |How many turns of the Gravity Gear Extension hand crank does it take to lower the gear manually?
[ FCOM-DSC-32-10-40 ]

Answer 23

º 3 clock-wise turns
[ NOSE WHEEL STEERING ]

Question 24

25 |What hydraulic system supplies nose wheel steering?
[ FCOM-DSC-32-20-10 ]

Answer 24

º Yellow

Question 25

26 |The steering hand wheels can steer the nose wheel up to how much in each direction? [ FCOM-DSC-32-20-10 ]

Answer 25

º +/- 75°

Question 26

27 |When using the rudder pedals for steering, when does the steering angle begin to reduce?
[ FCOM-DSC-32-20-10 ]

Answer 26

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