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Part 66 Module 7 > Module 7.18 > Flashcards

Module 7.18 Flashcards

1
Q

What is the definition of damage?

A

Change in CSA or permanent distortion

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2
Q

What is the definition of a defect?

A

Event or condition that reduces serviceability

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3
Q

What must be done before any repair?

A
  • Find extent
  • Material used
  • Type of repair required
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4
Q

Where should the assessment of damage begin?

A

Inspection of riveted joints and an inspection of corosion

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5
Q

What are the 3 damage categories?

A
  • Allowable
  • Non allowable
  • Non repairable
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6
Q

What defines abrasion?

A

Damage as a result of scuffing, rubbing or scraping

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7
Q

What defines corrosion?

A

Change in CSA due to electro chemical action

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8
Q

What defines a crack?

A

Partial or full break in the material that cause CSA damage

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9
Q

What defines crease?

A

Area that is depressed or folded back

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10
Q

What defines delamination?

A

Disband that occur between adjacent layers

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11
Q

What defines a dent?

A

Area pushed in from its centre length is the largest distance

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12
Q

What defines a disband?

A

Separation of material

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13
Q

What defines gauge?

A

CSA change due to sharp object gives a continuous sharp/smooth groove

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14
Q

What defines a hole?

A

Complete penetration

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15
Q

What defines a nick?

A

Local gouge with sharp edges

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16
Q

What defines a puncture?

A

Full penetration with no regular shape

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17
Q

What defines a scratch?

A

A line of damage, change in CSA (Cross Sectional Area)

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18
Q

Prior to inspection what should be done?

A

Open all required panels and structure throughly cleaned

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19
Q

When opening the panels and cowlings what should be looked for?

A

Any oil or fluid leaks

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20
Q

What can be produced to ensure that no areas are overlooked or forgotten?

A

A checklist

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21
Q

What inspection methods are often used?

A

Non Destructive Inspection (NDI)

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22
Q

What must be determined from the inspection?

A

What is the best repair or is replacing necessary

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23
Q

What visual aids can be used to help the inspection process?

A

Torches, mirrors, magnifying glass

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24
Q

How can internal structure and components be inspected?

A

Boroscope

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25
Q

What can corrosion left alone lead to?

A

New corrosion to form

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26
Q

What can corrosion look like on a painted surface?

A

Scaly surface, change of colour, blisters in the paint

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27
Q

When would damage be assessed?

A

After all corrosion is removed

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28
Q

How is paint removed in small areas and large areas?

A

Small - Mechanical
Large - Chemical

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29
Q

What must be done to affected fasteners?

A

Removal

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30
Q

What magnifying glass should be used to check for corrosion removal?

A

10x

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31
Q

What mechanical methods are not suitable for aluminium?

A

Wire brushing, grinding

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32
Q

Where can’t you abrasive blast?

A

Internal areas

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33
Q

What doesn’t rust do, that passive films do?

A

Protect metal underneath

34
Q

What does the presence of rust act as?

A

A catalyst

35
Q

What is the most. common chemical method of rust removal?

A

Phosphoric acid

36
Q

What does phosphoric acid to remove rust?

A

Makes it water soluble

37
Q

What colour does corrosion on CRES + nickel chromium appear as?

A

Black

38
Q

How is CRES + nickel chromium corrosion removed?

A

Phosphoric acid

39
Q

How can titanium surfaces be cleaned?

A

By hand with aluminium polish

40
Q

What is the purpose of pre treating metal?

A
  • Increase corrosion resistance
  • Better adhesion surface
41
Q

What is anodising?

A

Layer of oxide produced to act a a barrier

42
Q

What affects film thickness?

A

Voltage and duration

43
Q

What is CAA treatment?

A

Chromic acid anodising uses chromic acid

44
Q

What is Eloxadising?

A

Electric oxides aluminium with sulphuric acid

45
Q

What annoying process do airbus use?

A

Sulphuric acid anodising

46
Q

What properties do Eloxation layers have?

A

Ceramic, so not elastic

47
Q

Where is anodising used?

A
  • Integrally milled structural parts
  • Bonded surfaces
  • On the outer skin
48
Q

Where are phosphate coatings used?

A

On steel parts

49
Q

What are the 3 main types of phosphate coatings?

A
  • Manganese
  • Iron
  • Zinc
50
Q

When must chemical conversion not be used?

A

Components subjected to an operating temp more than 70 degrees C

51
Q

Define paint finishes?

A

All coatings manually painted or sprayed on

52
Q

What are the 2 main reasons for paint finishes?

A
  • Decorative finishes
  • Cabin protection
53
Q

What 3 layers do Airbus use?

A
  • Wash primer
  • Paint primer
  • Coating lacquer
54
Q

What 2 layers do Boeing use?

A
  • Primer
  • Top coat
55
Q

What occurs before priming on Boeing?

A

Pre-treatment: CCC (Chemical Conversion Coating)

56
Q

What occurs before priming on Airbus?

A

Pre-treatment: CCC (Chemical Conversion Coating) or CCA (Chromic Acid Anodised)

57
Q

What occurs before priming on both Boeing and Airbus?

A

Pre-treatment: CCC (Chemical Conversion Coating)

58
Q

What parts/components require a conductive paint coating?

A

Plastic components, i.e. radome

59
Q

To achieve conductivity how many countersinks must be painted with conductive paint?

A

Minimum 75%

60
Q

Where must antistatic not be applied?

A

Antennae covers

61
Q

When would water displacing inhibitors be used?

A

In areas that do not permit corrosion removal

62
Q

When is FCR primer not recommended?

A

Higher than 75% humidity and below 15 degrees C

63
Q

What is a jig?

A

A device that allows manufacture repair or rigging to high dimensional accuracy

64
Q

When installing a rivet hart is the formed end called?

A

Shop end / tail end

65
Q

Cracks in the head are permitted to limits in what alloy of rivets?

A

2017, 2024

66
Q

Friction lock rivets cannot be replaced by what?

A

Solid shank rivets of the same size

67
Q

Disadvantage of a mechanical lock could be?

A

Too short for application

68
Q

What is the most common removal method of hi-locks?

A

Allen key and mole grips

69
Q

What are 2 types of sealants?

A
  • Silicone
  • Non silicone
70
Q

Where would silicon sealants be used?

A

Heat resistance is required

71
Q

What colour are silicon sealants?

A

White, red, grey

72
Q

How are class E and F sealants applied?

A

Sprayed on

73
Q

What is the application time?

A

Time after thawing that the sealant can be applied

74
Q

What is tack free time?

A

Sufficient curing that it won’t transfer to a finger

75
Q

What is cure time?

A

Cured firmly enough that it can be handled without damage

76
Q

Sealant removal tools are made of what?

A

Hard wood or metal no harder than 2024 T3

77
Q

Where are fillet seals applied?

A

Edges of joints

78
Q

Injection seals are used to fill what?

A

Channels

79
Q

Where would faying seals be used?

A

Layer of seal between 2 fastened surfaces

80
Q

What is the seal plane?

A

Structural boundary where leak may occur

Part 66 Module 7 (16 decks)

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