LANDING GEAR AND BRAKES CBT

Question 1

What provides an overview of the Landing gear and Brakes?

Answer 1

Hydraulic Synoptic Page

Question 2

What powers the landing gear and brakes?

Answer 2

Hydraulically actuated.

Question 3

What powers the outboard brakes?

Answer 3

Hydraulic System 1.

Question 4

What powers landing gear?

Answer 4

Hydraulic system 2

Question 5

How do we operate the gear if Hydraulic system 2 fails?

Answer 5

With the assistance of the PTU.

Question 6

What powers the inboard brakes?

Answer 6

Hydraulic system 2

Question 7

What powers nosewheel steering?

Answer 7

Hydraulic system 2

Question 8

What is the Emergency/Parking brake accumulator?

Answer 8

A dedicated accumulator that stores hydraulic pressure from system 1 and 2.
Gives us 6 application of Emergency/Parking brake.

Question 9

Prior to pushback what must the Captain verify?

Answer 9

Steering OFF
Brakes released
Nose gear towing light is green

Question 10

When will the STEER OFF message show on EICAS?

Answer 10

Hydraulic System 2 is depressurized.
Steering disconnect switch is pressed.
External Steering disengage is set to DISENGAGE

Question 11

What are the Landing Gear Position Indications?

Answer 11

Green - Down and locked
White - Up and locked
Amber (cross-hatched) - In transit
Red- Disagreement with lever

Question 12

What does it mean is the Autobrake status is blank?

Answer 12

The autobrake is disarmed.

Question 13

If EMER ACCU pressure is amber, what can be done?

Answer 13

Turn on Hydraulic ACMP for system 1 or 2

Question 14

What is the RTO setting on the autobrake knob?

Answer 14

Rejected Takeoff, it is MAXIMUM braking.

Question 15

How does the Autobrake detect a rejected takeoff?

Answer 15

Wheel speed above 60kts and Thrust reversers in IDLE or REV.

Question 16

When do the autobrakes release the brakes in RTO?

Answer 16

at least 20% brake pressure applied
System faults below 60kts
Thrust levers greater than IDLE

Question 17

If attempting to set RTO, and brake pedals are pressed, what will happen.

Answer 17

Knob will snap back to OFF

Question 18

After takeoff does the Autobrake knob need to be set to OFF?

Answer 18

NO, when weight OFF wheels is sensed, it will automatically snap to OFF.

Question 19

In any autobrake setting, when will it release the brakes?

Answer 19

At least 20% brake pressure applied
System faults
Thrust levers greater than IDLE

Question 20

Upon landing when do the autobrakes activate?

Answer 20

2 seconds after weight on wheels.

Question 21

What is the slowing rate of each brake setting?

Answer 21

LO 2kts/second
MED 4kts/second
HI- 8 kts/second

Question 22

What happens if you accidentally bump the gear lever to up position on the ground?

Answer 22

Nothing. the WOW (weight on wheels) sensors mechanically lock the gear lever down.

Question 23

What is the DN LOCK REL button?

Answer 23

Down Lock Release, it overrides the down lock protections.

Question 24

When would we use the Landing Gear Warning Inhibit Button?

Answer 24

As directed by the QRH

Question 25

What happens when the Alternate Gear Extension Lever is pulled?

Answer 25

It releases the hydraulic pressure in the landing gear lines and mechanically releases all landing gear up locks.

Question 26

What is the Alternate gear extension Electrical override switch for?

Answer 26

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

Question 27

When setting the parking brake, what indication must we see?

Answer 27

EMERG/PRKG BRAKE light illuminates.

Question 28

How many wear pins do the gear have? How do we check them?

Answer 28

4 pins per main gear, must be check with the parking brake set.

Question 29

What is the BCM?

Answer 29

Brake Control Modules.

Question 30

What protection do the BCMs provide?

Answer 30

Antiskid protection - active 10kts or more Automatic Wheel braking - Stops main gear during retraction Touchdown protection - Prevents braking with wheel speed above 50kts or 3 seconds after touchdown. Locked wheel protection - active above 30 kts.

Question 31

What is the steering authority of the rudder pedals?

Answer 31

7° left/right with steering engaged.

Question 32

How do we steer if the steering is disengaged?

Answer 32

Differential thrust and braking.

Question 33

How is the tiller operated? What is the steering authority?

Answer 33

Pressed and held down | Up to 76° at slow speeds