Chapter 32 Landing Gear

Question 1

How many anti-skid valves are there?

Answer 1

6, four norm, two alt

Question 2

Where is the PSEU located?

Answer 2

In the FWD E/E

Question 3

How many doors on each main landing gear?

Answer 3

3,
outer, centre, inner

Question 4

Which HYD system is used for alternate breaking?

Answer 4

A

Question 5

What HYD system is used for normal landing gear extension?

Answer 5

A

Question 6

Which HYD system is used for normal landing gear retraction?

Answer 6

Both A or B

Question 7

How does system B retract the landing gear?

Answer 7

Through the transfer valve

Question 8

Nose wheel steering is normally operated by which hydraulic system?

Answer 8

A

Question 9

How do you put the aircraft in AIR MODE?

Answer 9

Override the AIR/Ground system on the PSEU

Question 10

What is the purpose of the lever lock solenoid?

Answer 10

It prevents accidental movement of the landing gear lever on the ground.

Question 11

What is the function of the MLG shimmy damper?

Answer 11

Decreases the vibrations between inner and outer cylinders during high speed taxi and heavy break use.

Question 12

What is the function of the scraper ring?

Answer 12

It protects the inner strut from FOD

Question 13

How many gear down-lock sensors are there?

Answer 13

Two per landing gear

Question 14

What happens when you select AIR MODE on sys 1 on ground?

Answer 14

The PSEU light will illuminate, along with the red light on PSEU

Question 15

When will the PSEU light illuminate?

Answer 15

When the aircraft is on the ground for more than 30 seconds and throttle levers are less than 53 degrees.

Question 16

How do you test the LGTV (landing gear transfer valve)

Answer 16

Via the bite test on the PSEU

Question 17

When must you replace the cartridge on the tail skid?

Answer 17

When the green band is no longer in view.

Question 18

Where do the nose wheel steering inputs come from?

Answer 18

The tiller and rudder pedals.

Question 19

What is the maximum turning capability when using rudder pedals?

Answer 19

7 degrees

Question 20

Where are the 4 thermal fuse plugs located?

Answer 20

On the wheels

Question 21

What happens when the parking break shutoff valve closes?

Answer 21

It closes the return lines from the normal anti-skid valves.

Question 22

What would happen is the #1 wheel was to skid during alternate (ALTN) antiskid?

Answer 22

1 and #2 will be released.

The work independently in normal config.

Question 23

What is the purpose of lock wheel protection?

Answer 23

It compares the wheel speed between the two inboard or two outboard wheels, and release brake pressure to the slower wheel if the differential is greater than 30%

Question 24

What hydraulic system is used for autobrake?

Answer 24

System B only.

Question 24

What is the purpose of the autobrake shuttle valve?

Answer 24

Selects the highest pressure source to send to the brakes.

Question 25

If normal anti-skid fails, will autobake arm?

Answer 25

NO

Question 26

What would indicate a disagreement between the parking brake valve and the switch?

Answer 26

Anti-skid inop and no parking brake light

Question 27

What indication will you have when autobrake applies brake pressure and arming conditions are lost?

Answer 27

You will recieve an AUTOBRAKE DISSARM light and the autobrake switch will remain in the selected position.

Question 28

Can a PSEU no dispatch fault be reset?

Answer 28

No

Question 29

Landing gear selected down. What indicates that it is moving?

Answer 29

3 red lights

Question 30

What will happen if the landing gear is not down and locked when flaps greater than 15 degrees is selected?

Answer 30

A non-resetable continious landing warning horn alarms.