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Flashcards in Forward Instrument Panel Deck (23)
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1
Q

What is the function of the two Landing Gear Control and Interface Units (LGCIUs)?

A
  • Provide sequencing, operation, monitoring, and indications for the landing gear.
  • Provide aircraft “In Flight” or “On the Ground” signals to other aircraft systems
2
Q

What hydraulic system powers the landing gear and doors?

A

Green

3
Q

If performing a gravity gear extension, what is one consideration concerning hydraulic power?

A

Hydraulic power is no longer available to the landing gear system (it is bypassed).

4
Q

When does the red arrow in the LND panel illuminate?

A

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

5
Q

What happens if airspeed is 280 knots and the Landing Gear lever is selected DOWN?

A

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

6
Q

What do the red UNLK lights indicate?

A

The landing gear is not locked in the selected position.

7
Q

What controls the LDG GEAR lights?

A

LGCIU 1

8
Q

If LGCIU 1 fails will the lights still work?

A

Yes, as long as it is still powered.

9
Q

What controls and manages all braking functions?

A

The Brake and Steering Control Unit (BSCU)

10
Q

What happens when the A/SKID & N/W STRG is switched OFF?

A
  • Loss of nose wheel steering
  • Braking is powered by the YELLOW system
  • Anti-skid is deactivated
11
Q

Which hydraulic systems provide pressure to the brakes?

A
  • Normal brakes – GREEN

* Alternate brakes – YELLOW backed up by a hydraulic accumulator

12
Q

When do the Auto Brakes activate on landing if armed?

A

When the ground spoilers deploy.

13
Q

What is the difference between LOW and MED AUTO BRK?

A
  • LOW – progressive pressure applied to brakes 4 seconds after ground spoilers deploy in order to decelerate the aircraft at a rate of 5.6 ft./s2
  • MED – progressive pressure applied to brakes 2 seconds after ground spoilers deploy in order to decelerate the aircraft at a rate of 9.8 ft./s2
14
Q

What does the AUTO BRK green DECEL light indicate?

A

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

15
Q

What is the Takeoff setting for Auto Brakes?

A

Max

16
Q

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

A
  • Airspeed above 72 knots, and
  • Thrust levers at IDLE, and
  • Ground spoiler extension
17
Q

What is the impact of the loss of GREEN hydraulic pressure on the Auto Brakes?

A

The Auto Brake function is lost, because the aircraft is now relying on the alternate brake system.

18
Q

If on the alternate brake system, what is required in order to maintain Anti- skid function, if anything?

A

At least 1 channel of the BSCU

19
Q

What would happen to the spoilers if they were not armed, but at least one engine was selected into reverse thrust?

A

They would still deploy, even if they were not armed

20
Q

How many brake applications are available with accumulator pressure?

A

Approximately 7 full applications

21
Q

What is the maximum brake temperature for takeoff?

A

300°C and BRK FANS OFF

22
Q

What does the BRAKES & ACCU PRESS triple indicator indicate?

A
  • YELLOW hydraulic pressure delivered to the left and right brakes
  • YELLOW system brake accumulator pressure
23
Q

Describe the procedure for the brake check prior to taxi. What is the significance of the callouts?

A
  • Press the brake pedals to ensure the aircraft slows, and check the brake pressure on the triple indicator is zero.
  • Calling out “pressure zero” indicates the GREEN hydraulic system has taken over, and the normal braking system is operational.