Landing Gear And Brakes

Question 0

What happens if 2 WOW sensors fail on the same gear

On ground?

In flight?

Answer 0

Lg lever will not move up and
Lg no dispatch caution msg will display

In flight the lg lever will be stuck down and
Lg WOW sys fail caution msg

Question 1

How many weight on wheels (WOW)

Sensors Are there

Answer 1

2 on each gear

Question 2

What does the electrical override system do

Answer 2

It bypasses the PSEM and extends the gear the same way as normal operation

Question 3

How does the alternate extension work

Answer 3

Pull up on the lever, that releases all hydraulic pressure in the lines and opens all gear up locks,

The gear will then free fall into position

Question 4

When of you use the down lock release button

Answer 4

Only in event of landing gear control lever failure

Or if needed to clear obstacles in an emergency

Question 5

When will gear aural warning sound and not be able to be silenced

Answer 5

Slat flap 5 or full

Slat flap lever in 0,1,2,3,4 and
RA below 700
TLA below 45° (2 engine)
TLA below 59° ( single engine)

Dual RA failure with flaps slats 5 or full

Question 6

What powers the outboard brakes

Answer 6

Hyd sys 1

Question 7

What powers the inboard brakes

Answer 7

Hyd sys 2

Question 8

What does the BCM ( brake control module) provide

Answer 8

Locked wheel protection
Anti skid protection
Automatic wheel braking
Touchdown protection

Question 9

What is locked wheel protection

Answer 9

System compares wheel speeds or pairs( outboard. Or inboard pairs)

Must be above 30 kts.
If one pair is 33% or below of it’s paired wheel, Hyd pressure on that brake is dropped to zero

Question 10

Below what speed is anti skid protection deactivated

Answer 10

10 kts

Question 11

What is automatic wheel braking

Answer 11

Prevents gear from spinning during retraction

Question 12

What is touchdown protection

Answer 12

Prevents plane from landing with main gear brakes applied

It is deactivated 3 seconds after WOW and when wheel speed above 50 kts

Question 13

Which Hyd sys powers the emergency brake

Answer 13

1 and 2

Question 14

How many brake applications will emergency brake allow

Answer 14

6

Question 15

What Hyd system is the nose wheel steering on

Answer 15

2

Question 16

What are 3 modes of steering

Answer 16

Hand wheel
Rudder pedal
Free wheel steering

Question 17

What are the hand wheel steering limits

Answer 17

+- 76°. Up to 10 kts
20° above 26 kts
7° above 100 kts

Question 18

What is maximum steering angle with rudder pedals

Answer 18

7°