Brakes And Landing Gear

Question 1

How is the landing gear existences and retracted?

Answer 1

Electronically commanded and hydraulically actuated

Question 2

When will the aural warning for the landing gear sound?

Answer 2

Gear not down and locked

Below 700 RA and low TLA

Anytime plans more than 5

Question 3

What keeps the landing gear locked in position?

Answer 3

Extended……….downlocks springs

Retracted………unlocks hooks

Question 4

How are the brakes commanded?

Answer 4

Brake by wire

Electrically commanded and hydraulically actuated

Pedal position transducers send brake request to the BCM brake control Module

Question 5

What hydraulic systems provide brake pressure?

Answer 5

HYD 1 outboard brakes
HYD 2 inboard Brakes
HYD1 and 2: emergency brake

Question 6

What protection are provided for braking?

Answer 6

Touchdown =no braking before 3 sec or 50 wheel speed

Anti skid= compares wheel speed and releases wheel pressure inop below 10

Locked wheel : allow 33% differential braking for steering purposes{ inop below 30}

Question 7

What controls the nose steering

Answer 7

HYD 2

Question 8

What are the limits for the nose wheel steering?

Answer 8

Angle varies with ground speed
Up to 40 kts +_ 76 degrees
41 to 100 76 to 7 degrees