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MLG > Everything > Flashcards

Everything Flashcards

1
Q

3 types of tyre tread

A

Ribbed
chinned
Anti shimmy
bald

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2
Q

What is bearing creep

A

Distributes wear evenly to prolong the life of the bearing

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3
Q

What are the type of bearing used in wheels

A

Tapered roller bearing

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4
Q

Types of tyre and advantages

A

Tubed and Tubeless

Tubeless has less weight
Cooler running
Less deflation from punctures
less likely for rapid deflation

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5
Q

two types of AC wheels

A

Divided (two halves)

Loose flange

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6
Q

What are some tyre damages

A 
Wear
Flat spots
Bulls eye
Tyre burst
tread bulge
ageing
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7
Q

purpose of a valve stem cap

A

Prevents ingress of dirt and moisture

Acts as secondary seal

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8
Q

What are rotors or stators

A

Rotors turn with the wheel

Stators are fixed to the wheel hub and are worn away

Actuators pushes rotors and stators together creating friction to slow the aircraft

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9
Q

What is the purpose of landing gear

A

To support the AC

absorb landing loads

Provide steering on the ground

provides clearance for fuselage, engines, wing stores

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10
Q

Two types of landing gear and where are they are used

A

Fixed and retractable

Fixed-small AC
Retractable- Faster AC

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11
Q

Landing gear configurations

A

Tail dragger
Tricycle
Tandem
Multiboogie

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12
Q

How does nose wheel steering control valve assy work

A

Spring loaded compensator

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13
Q

Why does nose wheel have shimmy damper

A

Nose wheel shimmy and oscillations

Dampens the movement

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14
Q

What is AC anti skid

how does it work

A

Prevents skidding from excessive braking
ABS (haul effect)

Prevents pilots from excessive breaking causing skidding

Must have a form of Wheel Speed sensor, detects
if wheel Speed slows and releases
brakes before wheel can skid

  • Valve stops all pressure being, relieved for next brake application

ABS is armed in cockpit but runs automatically

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15
Q

Whats an alternative to nose wheel steering

A

Differntial braking
Differntial throttle
Tug
rudder

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16
Q

What is a fuseable plug

A

Used to safely deflate tyres due to overheating

Colour coded red, green, yellow to indicate max heat loading

17
Q

How do shock struts work

2 types

A

With or without a separator

Piston inside of cylinder with tapered metering pin

When extended fluid flows through metering pin

when compressed fluid is compressed due to metering pin taper, nitrogen acts to extend the piston again

18
Q

types of retraction

A

Hydraulic (Linear actuators)
Electrical
Mechanical
Screw jacks

19
Q

What is used to centre nose wheels for retraction

A

Cantering Cam

Scissor link

20
Q

two types of landing gear linkages

A

Scissor Link- limits oleo extension, aligns wheels

Drag link- holds landing gear extended by over entering, collapses when retracts

21
Q

Explain components in nose wheel steering

A

Steering input provides at pilots control wheel

Wheel is connected to cables
Cables move control arm

Control arm move pistons in control valve ASSY

Control valve ASSY allows fluid from steering actuator

Steering actuator moves wheel

Steering collar allows per movement of cables to each side

22
Q

common damages to bearings

A

Water stains (indicates intergranular corrosion)

Spalling (chipping or missing material)

Over heating (discolouration)

23
Q

4 main parts of tyre

A

Bead
carcass
tread
sidewall

24
Q

4 landing gear safety devices

A

Weight on wheels microswitch
Safety pins
Gear indicators
nose wheel centering

25
Q

Extension of an oleo strut is used to measure

A

Proper operating position

26
Q

Can you set the park brake on multiple dick brakes when the brakes are hot?

A

No. The circulating air is used to cool the brakes

27
Q

A nose cams primary purpose is to…

A

Centre the wheel before it enters the wheel

28
Q

When does Anti skid automatically turn off and what are the 3 main components

A

Turns off under 20mph

Wheel speed sensor, control box, control valve

29
Q

Debooster cylinders are used to

A

Reduce the pressure to the brake,

Increase the volume of fluid flow

30
Q

How are chevron seals installed

A

With the open side facing the direction of fluid pressure

31
Q

What type of valve is used in the brake actuating line to isolate the brake system from the normal power brake control valve

A

A shuttle valve

32
Q

Chevron seals are used to

A

Prevent oil from escaping

MLG (1 decks)

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