Landing Gear

Question 1

A landing gear shock strut should be inflated with what gas

Answer 1

Nitrogen or dry air

Question 2

What condition should an mechanic look for during a regular inspection of the exposed piston section of a landing gear

Answer 2

Cleanliness, evidence of damage, and proper extension

Question 3

What prevents air from leaking out between the two halves of a split wheel assembly

Answer 3

An O-ring

Question 4

Why are fusible plugs installed on some aircraft wheels

Answer 4

To release the pressure before a tire blows

Question 5

What safety precaution must be taken when removing a wheel from an axle or when disassembling a wheel

Answer 5

Tire is completely deflated

Question 6

What are the visible signs of excessive heating on a wheel bearing

Answer 6

Discoloration

Question 7

How are the pilots nose wheel steering commands transmitted to the steering control unit of a large aircraft

Answer 7

Mechanically , electrically, or hydraulically

Question 8

How is the nose wheel steering mechanism usually actuated on a small aircraft

Answer 8

By a mechanical linkage connected to the rudder pedals

Question 9

What is the name of the unit that prevents a nose wheel from vibrating or oscillating

Answer 9

Shimmy damper

Question 10

What are the most common sources of power used to extend and retract landing gear

Answer 10

Hydraulic pressure and electrical motors

Question 11

At what times should a gear retraction check be performed

Answer 11

During annual or other inspections and following a hard landing

Question 12

What mechanisms ensure that a nose wheel is not tuned as it retracts into the wheelwell

Answer 12

Internal centering cam

Question 13

Name several types of brake actuating systems

Answer 13

Independent, power boosted, and power control type

Question 14

What is the function of an anti skid system

Answer 14

Allow large aircraft to have maximum braking effectiveness without allowing wheels to skid or lock

Question 15

What is the purpose of a debooster

Answer 15

To reduce hydraulic system high pressure to a lower value for more satisfactory brake action

Question 16

What are two methods of bleeding brakes

Answer 16

Gravity and pressure

Question 17

Before a brake system can be inspected for leaks what action must be accomplished

Answer 17

Pressure must be applied to the system

Question 18

What maintenance function has the greatest impact on tire service life

Answer 18

Tires are properly inflated

Question 19

What affects does under-inflation have on aircraft tires

Answer 19

Internal heat damage possibly leading to premature tire failure and more tread wear on the shoulders than in the center

Question 20

What type of care should be given to landing gear shock struts

Answer 20

Inspect regularly for leakage of fluid and proper extension. Exposed portion of the strut should be wiped clean daily and inspected for scoring or corrosion

Question 21

What is the purpose of a shuttle valve in a power control system

Answer 21

Used to isolate the emergency brake system frm the normal brake system

Question 22

When inspecting brakes what do you look for

Answer 22

1. Check for leaks while system is
2. Check flex hoses for swelling, cracking or soft spots
3. Check brake pedal for spongy feeling ( indicates air in the system)
4. Check brake pedals for excessive travel ( indicates worn linings)

Question 23

What do you do before disassembling an oleo strut

Answer 23

Discharge the pressure

Question 24

What is the purpose of a torque link on an oleo strut

Answer 24

To keep the wheel in alignment and prevent the piston from coming out of the cylinder