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Kemble > 7.18 Disassembley, Inspection, Reapir And Assembly Techs > Flashcards

7.18 Disassembley, Inspection, Reapir And Assembly Techs Flashcards

1
Q

What are the two main types of defects that are inspected for

A

Metal fatigue and corrosion

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2
Q

What causes the condensation around aircraft’s

A

The changes in atmospheric pressure from ascending and descending

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3
Q

What causes metal fatigue

A

The repeated cycles of stress

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4
Q

How’s is the Majority of fatigue damage displayed

A

Small hairline cracks on the surface

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5
Q

What’s important to ensure when cleaning the aircraft

A

That the protective coverings are still in contact and that the cleaning fluids are approved by the manufacturer

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6
Q

What is can be added to metal structures to assist against corrosion

A

Calcium chromate or strontium chromate

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7
Q

What must be carried out if twisting or misalignment of aircraft structure is suspected

A

Kluge,ent or levelling checks must be carried out

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8
Q

What’s an endoscope made up from

A

Lenses and prisms fitted in a rigid metal tube

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9
Q

What diameter are endoscopes are commonly made to

A

6mm

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10
Q

Why do endoscopes use cold lighting

A

To prevent any sparks or ignitions caused by heat to occur which is important when being used in engines

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11
Q

What dimensions are light probes commonly made in ( diameter and stem lengths)

A

5 mm in diameter and 50 mm stem lengths

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12
Q

Why are inspections mirrors fitted with a light source

A

To avoid dazzling

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13
Q

What’s the most common type of magnification used in inspection mirrors

A

X2

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14
Q

What type of magnifying glass is used for viewing internal structures

A

A x8 magnification and a light probe fitted

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15
Q

What magnification size shouldn’t be used unless specified

A

x8

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16
Q

What are the four general types of actions that cause damage

A

• Mechanical action.
• Chemical action.
• Thermal action.
• Inherent metallic properties.

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17
Q

What are the two types of repairable damage

A

Non allowable and allowable

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18
Q

What are the two methods of paint removal

A

Chemical and mechanical

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19
Q

When is it appropriate to remove corrosions by abrasion using hands

A

When the corrosion is light

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20
Q

What are wire brushes made from

A

Stainless steel or aluminium oxide coated brushes

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21
Q

Why’s it important to ensure the metal doesn’t overheat when when grinding off corrosion

A

Because it may change the mechanical properties of the metal

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22
Q

What type of metal is the removal of corrosion using a grinder not suitable for

A

Aluminium alloys

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23
Q

When is abrasive blasting not recommended

A

For use internally

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24
Q

To obtain the best results when abrasive blasting what’s important to do with the positioning of the gun nozzle

A

Should be positioned so that the glass beads remove the corrosion in a width of approximately 25 mm

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25
Q

What’s the most common type of corrosion found on carbon steel

A

Red rust

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26
Q

Why can’t power tools be used on steel to remove corrosion

A

Because they may overheat due to steel being hard

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27
Q

What’s the hazards relating to titanium and silver chips

A

They are extremely flammable

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28
Q

Why are pretreatments carried out

A

To increase corrosion resistant properties and to give a surface food for adhesives

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29
Q

What type of metals are phosphate coatings used on

A

Steels

30
Q

What are the main types of phosphate coatings

A

Manganese, zinc and iron

31
Q

How thick is aluminium chromium oxide

A

0.001mm

32
Q

What system does Boeing use for its paint finishes

A

Two layer paint system

33
Q

What are the two main reasons for paint finishes

A

Aesthetics and protection

34
Q

What are the three types of surface protection repairs and what are they for

A

Fixing- cleaning and maintenance of existing paint
Partial or total renewal- that the surface is removed of paint and a fresh cover is put on
Basic renewal- complete removal of paint and checked for corrosion

35
Q

What general requirements should be taken into account when replacing a component

A

Correct number of people available, correct components, materials and work area

36
Q

What should be considered when working on systems with capacitors in them

A

The capacitors must be allowed to stand without power supply recommended before any work is carried out as they’re high power supplies

37
Q

What three things should be done before assembling a riveted joint

A

That the correct joining compounds used, the joints clean and the hole slightly oversize to allow for the expansion of the rivet shank

38
Q

If a repair has been carried out to a control surface what additional actions will be required in addition to the repair

A

They must be checked for balance as they might have added weight from repair metal patches or paint

39
Q

What’s the definition of a sealant

A

Sealing is a process that confines liquids and gasses within a given area
or prevents them from entering areas from which they must be excluded.

40
Q

What are five functions of seals

A

Contain fuel, maintain cabin pressure, reduce fire hazards, exclude moisture, prevent corrosion

41
Q

What’s a fillet seal and where’s it used

A

It’s used at structural joints and it’s used where maximum sealant of fuel liquids is required

42
Q

What is a seal where sequent is sandwiched between two surfaces

A

Faying surface seals

43
Q

What’s squeeze out time

A

The hours after application when the sealant can be squeezed out

44
Q

What’s tackfree time

A

The time after the sealants applied that’s required to ensure that no residue is left on the fingers after touching it

45
Q

What’s a seal plane

A
46
Q

What can effect the cure time of sealants

A

Heat

47
Q

What are methods of mixing sealants

A

Hand and machine

48
Q

Whaf are 5 things that have to be checked before applying a sealant

A
49
Q

What’s a semkit

A

Two part material injection

50
Q

What tool must be used to remove sealants

A

Something made from hardwood or metal not harder than 2024 t3 treated

51
Q

How is it possible to determine where fatugue might occur on aircraft structures

A

In places where repeated tress cycles occur

52
Q

What are the three types of endoscope

A

Introscope, boroscope, fiberscope

53
Q

What is anodising

A

Treating metals to form oxide coatings to improve performances of the metal

54
Q

What’s secondary damage

A
55
Q

When are injection seals used

A

To fill a channel. Or hole that occurs as a result of structural design

56
Q

What’s a seal plane

A

The structural boundary on which the continuity of the seal is established

57
Q

What’s a class a sealant

A

Brushable sealant

58
Q

What’s a class B seal

A

A filleting sealant

59
Q

What’s a class C sealant

A

A faying sealant

60
Q

What’s a class D sealant

A

Hole filling sealant

61
Q

What’s class E and f sealants

A

Sprayable sealants

62
Q

At what Temperature will a sealant start bubbling when applied

A

120 degrees FARENHIET U STUPID CUNT NOT CELCIUS

63
Q

What precautions must be made with silicone sealants

A

Should be stored separate from other sealants
Should have separate tools used
The use of mechanical freezers not CO2

64
Q

What’s the three phase system used for applying silicone sealants

A

A brush coat is applied
A small fillet seal is applied
Final fillet seal applied

65
Q

What type of seals are used for isolating fuel tank leakages

A

Faying surface seals

66
Q

What’s used on fasteners to prevent leaking of liquids through fasteners

A

Small lightweight aluminium seal caps

67
Q

What’s the maximum temperature a machine ,iced sealant compound can be stored at

A

-40 degrees FARENHIET U SILLT CUNY

68
Q

How long Should you allow a sealant to thaw before use

A

5-10 mins in warm water
Or
30 mins in room temperature

69
Q

Why’s it important for a sealant to thaw before application

A

Because a cold sealant doesn’t adhere correctly

70
Q

What’s solvent are commonly used to clear sealants

A

MEK

71
Q

What should the temperature of the structure be thawed to before having a sealant applied to it

A

50 degrees FARENHIET

Kemble (39 decks)

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