11.13

Question 1

What aircraft uses tail wheel configuration

Answer 1

Propeller and light

Question 2

In a tail wheel configuration where is the main gear located in terms of CoG

Answer 2

Foward of the aircraft centre of gravity

Question 3

What’s the most used landing gear arrangement and where is the Cog

Answer 3

Tricycle configuration

CoG is ahead of main wheels

Question 4

What’s are 3 advantages of tricycle configuration

Answer 4

Ground looping prevented

Better braking

Forward vision not obstructed

Question 5

What is thr configuration of the landing gear in tandem

Answer 5

Main and tail along longitudinal axis

Gear is fwd and aft of CoG

Question 6

What aircatft uses fixed landing gears

Answer 6

Low speed aircraft to save weight and money

Question 7

What’s the function of the truncation link

Answer 7

Connect top of the leg to wing structure

Leg can rotate into out and of landing gear bay

Question 8

What are the cylinders filled with

Answer 8

Hydraulic oil and nitrogen

Question 9

What makes sure that 2 parts of landing gear can’t fold together when the main gear is extended

Answer 9

Gear down lock mechanism

Question 10

What does the shortening mechanism work in opposite to

Answer 10

Landing gear extension

Question 11

Where is the nose landing gear retracted to

Answer 11

Fwd into fuselage

Question 12

How many wheels does the nlg have and is it steerable

Answer 12

2 wheels and steerable with no brakes

(Lighter then Main Landing Gear)

Question 13

How does the ngl extend without hydraulics

Answer 13

Weight of the gear and air stream

Question 14

What does the axle do

Answer 14

Proved instillation of the aircraft wheels

Question 15

What does the axle do

Answer 15

Proved instillation of the aircraft wheels

Question 16

What does a torque link dampener do

Answer 16

Named shimmy damper

Counteracts wheel shimmy

Question 17

What are the two types of shock absorbers

Answer 17

Solid - made of steel or rubber

Oleo pneumatic - fluid spring with gas or oil

Question 18

What are the two parts of oleo pneumatic strut

Answer 18

One compresses oil at pressure above 700 bar

One uses oil and nitrogen

Question 19

What are main gear shock struts serviced with

Answer 19

Nitrogen gas and specified hydraulic fluid

Question 20

Why do we need correct sequencing with the landing gear

Answer 20

Prevents it from getting jammed

Question 21

How is the inner cylinder in the nose shock strut during take off

Answer 21

Inner cylinder in the nose fully extendeds

Question 22

On nose gear extension what makes sure that the jack moves under positive pressure

Answer 22

Restricted return flow

Question 23

What emergency extension system is preferred

Answer 23

Free fall system

Question 24

What does a green light indicate

Answer 24

Down and locked

Question 25

What colour indicates the landing gears is unlocked or travelling

Answer 25

Red

Question 26

If no lights are showing what does that mean for the gear

Answer 26

Up and locked

Question 27

What are micro switches and used when

Answer 27

Devices that can open and close an electrical circuit at very high speed Used when physical contact with an object is permissible

Question 28

When are proximity switches used

Answer 28

When high risk of contact corrosion can occur from dirt and moisture

Question 29

2 types of proximity switches

Answer 29

Reed and Electrical

Question 30

How does a reed switch protect against corrosion

Answer 30

Contacts are in a glass tube

Question 31

What material is a electronic proximity switch

Answer 31

Non magnetic ferrous metal to influence electrical characteristics

Question 32

How can the crew visually see if landing gear is down and locked

Answer 32

Small viewing assembles in the floor of aircraft Correct positioning is indicated by red paint stripes and arrows aligned

Question 33

When can the auditory warning not be cancelled unless the landing gear is selected down

Answer 33

If the landing flap is selected with the gear not down

Question 34

What are aircraft wheels made of

Answer 34

Forged or cast from aluminium alloy

Question 35

How and when are wheels balanced

Answer 35

Statically and dynamically at manufacture

Question 36

How and when are wheels balanced

Answer 36

Statically and dynamically at manufacture

Question 37

Where are brakes fitted

Answer 37

Inboard half of the wheel

Question 38

What’s the job of a fusible plug

Answer 38

Release tyre pressure when the temperature of a wheel hits a certain temperature

Question 39

What aircraft use single disk brakes

Answer 39

Small aircraft

Question 40

How many brake linings in a single disk brake

Answer 40

6

Question 41

How does the caliper housing remove unwanted air

Answer 41

Bleed port

Question 42

Why would you multiple disk brakes

Answer 42

Increased friction surface to maximise braking forces and heat to disperse

Question 43

Rotor and stator material

Answer 43

Carbon fibre 40% lighter than conventional brakes

Question 44

Advantage for carbon heat packs

Answer 44

Withstand temperatures over 50% higher than steel brakes Last 20-50% longer

Question 45

Brake piston function

Answer 45

Apply brake force relative to pressure applied to brakes Compensate for the wear of disc brakes Automatically adjust brake clearance

Question 46

What is piston clearance

Answer 46

Distance between piston and spring sleeve

Question 47

What shows us the wear of the heat pack

Answer 47

Wear indicator pin

Question 48

How many wear indicators attached to pressure plate

Answer 48

2

Question 49

Where is brake booster located

Answer 49

Downstream of the control valve and anti skid

Question 50

How does parking brake work

Answer 50

Shut off valve is closed in the common return line Traps fluid in the brakes which keeps rotors stationary

Question 51

What colour are numbers 0-4

Answer 51

White

Question 52

What colour are numbers 5-9

Answer 52

Amber

Question 53

What does brake debooster do

Answer 53

Reduces the maximum hydraulic system pressure

Question 54

Type 3 tyres

Question 55

Type 7 tyres

Answer 55

High performance on jet aircraft

Question 56

Type 8 tyres

Answer 56

High pressure and high speed aircraft Most advanced

Question 57

Fabric layer in tyre

Answer 57

Carcass

Question 58

Fabric is orientated to what

Answer 58

90 degrees to Plane of rotation

Question 59

What does a balance mark show

Answer 59

Light point in tyres balance

Question 60

What Touchdown protection

Answer 60

Anti skid valve opens passage between brakes and hydraulic system Stops build up in brakes

Question 61

What are tyres inflated to for storage

Answer 61

20-30psi