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Flashcards in Landing Gear And Brakes Deck (19):
0

How many weight on wheels (WOW)
Sensors Are there

6.

2 on each gear

1

What happens if 2 WOW sensors fail on the same gear

On ground?

In flight?

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

2

What does the electrical override system do

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

3

How does the alternate extension work

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

4

When of you use the down lock release button

Only in event of landing gear control lever failure

Or if needed to clear obstacles in an emergency

5

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

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

6

What powers the outboard brakes

Hyd sys 1

7

What powers the inboard brakes

Hyd sys 2

8

What does the BCM ( brake control module) provide

Locked wheel protection
Anti skid protection
Automatic wheel braking
Touchdown protection

9

What is locked wheel protection

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

10

Below what speed is anti skid protection deactivated

10 kts

11

What is automatic wheel braking

Prevents gear from spinning during retraction

12

What is touchdown protection

Prevents plane from landing with main gear brakes applied

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

13

Which Hyd sys powers the emergency brake

1 and 2

14

How many brake applications will emergency brake allow

6

15

What Hyd system is the nose wheel steering on

2

16

What are 3 modes of steering

Hand wheel
Rudder pedal
Free wheel steering

17

What are the hand wheel steering limits

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

18

What is maximum steering angle with rudder pedals