Landing Gear/Brakes

Question 1

Which hydraulic system powers the landing gear extension/retraction?

Answer 1

Hydraulic system 2

Question 2

Which hydraulic system powers the inboard/outboard brakes?

Answer 2

Outboard: System 1
Inboard: System 2

Question 3

What must the captain verify with the pushback crew prior to pushback?

Answer 3

• Steering OFF
• Brakes RELEASED
• Green Light VERIFIED

Question 4

When is the STEER OFF message populated?

Answer 4

• Hydraulic System 2 becomes depressurized
• Steering disconnect switch is pressed
• External steering disengage switch is set to disengage

Question 5

When must you verify the STEER OFF message?

Answer 5

Prior to pushback and during flight control check

Question 6

How do you recharge the emergency/parking brake accumulator?

Answer 6

If yellow, recharge by turning ON ACMPs for hydraulic system 1 and 2.

Question 7

When do the autobrakes activate for RTO?

Answer 7

Recognizes RTO when:
- Wheel speed above 60 kts AND
- Thrust levers IDLE or REV

Releases brakes when:
- Brake pedal pressure is applied (20%) or
- System faults (below 60 kts) or
- Thrust levers greater than IDLE

Question 8

What is the rate of deceleration with LO autobrake?

Answer 8

2 knots per second

Question 9

What is the rate of deceleration with MED autobrake?

Answer 9

4 knots per second

Question 10

What is the rate of deceleration with HI autobrake?

Answer 10

8 knots per second

Question 11

When does the EMERG/PRKG BRAKE light illuminate?

Answer 11

When the parking brake is actuated and there is hydraulic pressure.

Question 12

What is the DN LOCK REL button?

Answer 12

When weight on wheels is true, the gear lever is mechanically locked in the down position. Pressing the DN LOCK REL button overrides this function.

Question 13

What are the other two ways to extend the landing gear if normal operation is not working?

Answer 13

Using the electrical override switch or the gear extension lever.

Question 14

What happens when pulling the gear extension lever?

Answer 14

Releases all hydraulic pressure in the landing gear lines and mechanically releases all landing gear uplocks. Allows gravity to drop the gear.

Question 15

What happens when selecting the electrical override switch to gear down?

Answer 15

Electronically bypasses the sensors and evaluation computers, and extends the landing gear.

Question 16

What must be done for accurate assessment of the brake wear pins?

Answer 16

The parking break must be set.

Question 17

What are the different brake protection modes?

Answer 17

Antiskid Protection
Automatic Wheel Braking
Touchdown Protection
Locked Wheel Protection

Question 18

What is anti-skid protection?

Answer 18

Prevents tire skidding and maximizes brake efficiency. Active at 10 knots or greater wheel speed.

Question 19

What does automatic wheel braking do?

Answer 19

Stops the main gear during landing gear retraction.

Question 20

What does touchdown protection do?

Answer 20

Prevents the airplane from touching down with the brakes applied. It only allows braking after:
- Wheel speed is above 50 knots OR
- 3 seconds after touchdown

Question 21

What does locked wheel protection do?

Answer 21

Prevents locked wheels by comparing inboard/outboard wheel speeds.

Active above 30 knots

Question 22

How many degrees can the rudder pedals steer?

Answer 22

7 degrees left or right.

Question 23

How do you re-engage nosewheel steering?

Answer 23

Press the tiller

Question 24

How do you use the tiller for steering?

Answer 24

Press and hold it down while steering it.

Question 25

How many degrees can the tiller command nosewheel steering?

Answer 25

At slow speeds, up to 76 degrees