Chapter 14: Landing Gear

Question 1

Describe the meaning of green Landing Gear indicator lights for landing gear verification.

Answer 1

Related gear is down and locked. Landing gear is down and locked as long as one green landing gear indicator light (center panel or overhead panel) for each gear is illuminated.

Question 2

Explain the meaning of the (amber) AUTO BRAKE DISARM light.

Answer 2

• SPEED BRAKE lever moved to down detent during RTO or landing.
• manual brakes applied during RTO or landing.
• Thrust lever(s) advanced during RTO or landing. (Except during first 3 seconds after touchdown or landing)
• landing made with RTO selected
• RTO selected on ground. (illuminates for two seconds then extinguishes)
• a malfunction exists in automatic braking system

Question 3

Explain the meaning of the (amber) ANTISKID INOP light.

Answer 3

A system fault is detected by the antiskid monitoring system.

Question 4

Explain the function of the Landing Gear Override Trigger.

Answer 4

Allows the Landing Gear lever to be raised, bypassing the landing gear lever lock.

Question 5

Recall antiskid is available in the normal and alternate brake systems.

Answer 5

Antiskid protection is provided in the normal and alternate brake systems. Both normal and alternate brake systems provide skid, locked wheel, touchdown and hydroplane protection.

Note: Antiskid protection is available even with loss of both hydraulic systems.

Question 6

Name the different brake systems.

Answer 6

The brake system includes:
Normal Brake System

Alternate Brake System

Brake Accumulator

Autobrake System

Parking Brake

Question 7

Describe the Normal Brake System

Answer 7

Normal Brake System

• The normal brake system is powered by hydraulic system B.
• Anti-skid and Autobrakes are available.

Question 8

Describe the Alternate Brake System

Answer 8

Alternate Brake System

• The alternate brake system is powered by hydraulic system A.
• If hydraulic system B is low or fails, hydraulic system A automatically supplies pressure to the alternate brake system.
• Anti-skid is available, Autobrakes are inoperative.

Question 9

Describe the Brake Accumulator System

Answer 9

Brake Accumulator

• The brake accumulator is pressurized by hydraulic system B.
• If both normal and alternate brake system pressure is lost, trapped hydraulic pressure in the brake accumulator can still provide several braking applications or parking brake application.
• Auto brakes are inoperative.

Question 10

Describe the Autobrake System

Answer 10

The Autobrake System

• Uses hydraulic system B pressure to provide maximum deceleration for rejected takeoff and automatic braking at pre-selected deceleration rates immediately after touchdown.
• The system operates only when the normal brake system is functioning.
• Antiskid system protection is provided during autobrake operation.

Question 11

Describe the Parking Brake System

Answer 11

Parking Brake

• The parking brake can be set with either A or B hydraulic systems pressurized.
• If A and B hydraulic systems are not pressurized, parking brake pressure is maintained by the brake accumulator. (Accumulator pressure is shown on the HYD BRAKE PRESS indicator.)

Question 12

Recall how the autobrakes can be disarmed.

Answer 12

• Moving the SPEED BRAKE lever to the down detent.
• Advancing the forward thrust lever(s), except during the first 3 seconds after touchdown for landing.
• Applying manual brakes.
• Moving the selector switch to the OFF position.