FORWARD INSTRUMENT PANEL

Question 1

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

Answer 1

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

Question 2

What hydraulic system powers the landing gear and doors?

Answer 2

Green

Question 3

After Emergency Landing Gear Gravity Extension, what other system is affected?

Answer 3

Nose wheel steering will be inoperative

Question 4

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

Answer 4

No

Question 5

When does the red arrow in the LND panel illuminate?

Answer 5

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

Question 6

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

Answer 6

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

Question 7

What do the red UNLK lights indicate?

Answer 7

The landing gear is not locked in the selected position

Question 8

What controls the LDG GEAR lights?

Answer 8

LGCIU 1

Question 9

If LGCIU 1 fails will the lights still work?

Answer 9

Yes, as long as LGCIU is still electrically supplied

Question 10

What controls and manages all braking functions?

Answer 10

The Brake and Steering Control Unit (BSCU)

Question 11

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

Answer 11

• Lose Nosewheel steering
• Braking is powered by the Yellow system
• Anti-skid is deactivated

Question 12

Which hydraulic systems provide pressure to the brakes?

Answer 12

• Normal brakes – Green

* Alternate brakes – Yellow backed up by a hydraulic accumulator

Question 13

When do the Autobrakes activate on landing if armed?

Answer 13

When the ground spoilers deploy

Question 14

What is the difference between LOW and MED AUTO BRK?

Answer 14

• 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

Question 15

What does the AUTO BRK green DECEL light indicate?

Answer 15

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

Question 16

What is the Takeoff setting for Auto Brakes?

Answer 16

MAX

Question 17

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

Answer 17

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

Question 18

What two malfunctions will cause the loss of normal braking?

Answer 18

• Loss of both BSCU channels

* Loss of Green Hydraulic System

Question 19

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

Answer 19

No, not with the Alternate Brake system

Question 20

Is Anti-skid available with Alternate Brakes?

Answer 20

Yes, if at least one BSCU channel is available

Question 21

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

Answer 21

Yes – when at least one engine is in reverse

Question 22

How many brake applications are available with accumulator pressure?

Answer 22

Approximately 7 full applications

Question 23

What is the maximum brake temperature for takeoff?

Answer 23

300° C

Question 24

When should the brake fans (if installed) be selected to ON?

Answer 24

If temperature is likely to exceed 500°C, select BRK FAN to ON

Question 25

What does the BRAKES & ACCU PRESS triple indicator indicate?

Answer 25

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

Question 26

How do you perform the brake check during initial taxi?

Answer 26

Press the brake pedals to ensure the aircraft slows, and check the brake pressure on the triple
indicator is zero, indicating the Green hydraulic system has taken over