Landing Gear

Question 0

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

(2)

Answer 0

• the autobrakes are disarmed.

- the turn-on self test is not successful.

Question 1

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

Answer 1

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) ANTISKID INOP light.

Answer 2

A system fault is detected by the antiskid monitoring system.

Question 3

Explain the function of the Landing Gear Override Trigger.

Answer 3

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

Question 4

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

Answer 4

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 is also available via the brake Accumulator if both Normal and Alternate brake system pressure is lost.

Question 5

Describe the brake system.

Normal (2)
Alternate (3)
Brake Accumulator (3)
Autobrakes (3)
Parking Brake (2)

Answer 5

The brake system includes:

Normal Brake System

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

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.

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.

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.

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 6

Recall how the autobrakes can be disarmed.

4

Answer 6

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