Landing Gear Flashcards Preview

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Flashcards in Landing Gear Deck (24):
1

A landing gear shock strut should be inflated with what gas

Nitrogen or dry air

2

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

Cleanliness, evidence of damage, and proper extension

3

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

An O-ring

4

Why are fusible plugs installed on some aircraft wheels

To release the pressure before a tire blows

5

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

Tire is completely deflated

6

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

Discoloration

7

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

Mechanically , electrically, or hydraulically

8

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

By a mechanical linkage connected to the rudder pedals

9

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

Shimmy damper

10

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

Hydraulic pressure and electrical motors

11

At what times should a gear retraction check be performed

During annual or other inspections and following a hard landing

12

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

Internal centering cam

13

Name several types of brake actuating systems

Independent, power boosted, and power control type

14

What is the function of an anti skid system

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

15

What is the purpose of a debooster

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

16

What are two methods of bleeding brakes

Gravity and pressure

17

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

Pressure must be applied to the system

18

What maintenance function has the greatest impact on tire service life

Tires are properly inflated

19

What affects does under-inflation have on aircraft tires

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

20

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

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

21

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

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

22

When inspecting brakes what do you look for

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)

23

What do you do before disassembling an oleo strut

Discharge the pressure

24

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

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