35. 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

Question 2

What hydraulic system powers the landing gear and doors?

Answer 2

Green

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 controls and manages all braking functions?

Answer 4

The Brake and Steering Control Unit (BSCU)

Question 5

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

Answer 5

o Lose NWS
o Braking is powered by the Yellow system
o Anti‐skid is deactivated

Question 6

Which hydraulic systems provide pressure to the brakes?

Answer 6

o Normal brakes – Green

o Alternate brakes – Yellow backed up by a hydraulic accumulator

Question 7

What is the Takeoff setting for Auto Brakes?

Answer 7

MAX

Question 8

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

Answer 8

o Airspeed > 72KTS
o Thrust Levers at IDLE
o Ground spoiler extension

Question 9

How many brake applications are available with accumulator pressure?

Answer 9

Approximately 7 full applications

Question 10

What is the maximum brake temperature for takeoff (brake fans off)?

Answer 10

300° C

Question 11

What is the maximum brake temperature for takeoff when brake fans were ON?

Answer 11

150° C

Question 12

What does the BRAKES & ACCU PRESS triple indicator indicate?

Answer 12

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

Question 13

How do you accomplish the alternate brake check during preflight?

Answer 13

o Set the PARKING BRK to OFF.
o Step on both brake pedals and ensure proper resistance and deflection and check a minimum of 1000 PSI on BRAKES & ACCU PRESS triple indictor (L & R).
o Release pressure on the brake pedals.
o Set the PARKING BRK to ON. If required use the HYD YELLOW ELEC PUMP to recharge the brake accumulator (if necessary).

Question 14

How do you perform the brake check during initial taxi?

Answer 14

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.