Forward Instrument Panel

Question 1

What is the function of the two 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

When does the red arrow in the LND panel illuminate?

Answer 2

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

Question 3

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

Answer 3

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

Question 4

What do the red UNLK lights indicate?

Answer 4

The landing gear is not locked in the selected position

Question 5

What controls and manages all braking functions?

Answer 5

Normal brakes: Braking steering control unit (BSCU)
Alternate Brakes: Alternate braking control unit (ABCU)

Question 6

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

Answer 6

Nosewheel steering deactivated
Brake pressure is supplied by the Yellow hydraulic system
Anti-skid is deactivated
BSCU and ABCU are depowered
A 1,000 psi pressure limiting valve helps prevent wheel lock up

Question 7

Which hydraulic systems provide pressure to the brakes?

Answer 7

Normal brakes - Green
Alternate brakes - Yellow backed up by a hydraulic accumulator

Question 8

What are the four modes of braking?

Answer 8

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

Question 9

When do the autobrakes activate on landing if armed?

Answer 9

When the ground spoilers deploy

Question 10

What is the difference between LOW and MED AUTO BRK?

Answer 10

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 11

What does the AUTO BRK green DECEL light indicate?

Answer 11

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

Question 12

What is the takeoff setting for auto brakes?

Answer 12

MAX

Question 13

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

Answer 13

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

Question 14

If you lose Green hydraulic pressure, will you have auto brakes?

Answer 14

No, not with the alternate brake system

Question 15

Is anti-skid available with alternate brakes?

Answer 15

Yes, if certain conditions are met

Question 16

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

Answer 16

Yes - when at least one engine is in reverse

Question 17

How many brake applications are available with accumulator pressure?

Answer 17

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

Question 18

What does the BRAKES & ACCU PRESS triple indicate?

Answer 18

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