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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
What’s the most common type of corrosion found on carbon steel
Red rust
26
Why can’t power tools be used on steel to remove corrosion
Because they may overheat due to steel being hard
27
What’s the hazards relating to titanium and silver chips
They are extremely flammable
28
Why are pretreatments carried out
To increase corrosion resistant properties and to give a surface food for adhesives
29
What type of metals are phosphate coatings used on
Steels
30
What are the main types of phosphate coatings
Manganese, zinc and iron
31
How thick is aluminium chromium oxide
0.001mm
32
What system does Boeing use for its paint finishes
Two layer paint system
33
What are the two main reasons for paint finishes
Aesthetics and protection
34
What are the three types of surface protection repairs and what are they for
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
What general requirements should be taken into account when replacing a component
Correct number of people available, correct components, materials and work area
36
What should be considered when working on systems with capacitors in them
The capacitors must be allowed to stand without power supply recommended before any work is carried out as they’re high power supplies
37
What three things should be done before assembling a riveted joint
That the correct joining compounds used, the joints clean and the hole slightly oversize to allow for the expansion of the rivet shank
38
If a repair has been carried out to a control surface what additional actions will be required in addition to the repair
They must be checked for balance as they might have added weight from repair metal patches or paint
39
What’s the definition of a sealant
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
What are five functions of seals
Contain fuel, maintain cabin pressure, reduce fire hazards, exclude moisture, prevent corrosion
41
What’s a fillet seal and where’s it used
It’s used at structural joints and it’s used where maximum sealant of fuel liquids is required
42
What is a seal where sequent is sandwiched between two surfaces
Faying surface seals
43
What’s squeeze out time
The hours after application when the sealant can be squeezed out
44
What’s tackfree time
The time after the sealants applied that’s required to ensure that no residue is left on the fingers after touching it
45
What’s a seal plane
46
What can effect the cure time of sealants
Heat
47
What are methods of mixing sealants
Hand and machine
48
Whaf are 5 things that have to be checked before applying a sealant
49
What’s a semkit
Two part material injection
50
What tool must be used to remove sealants
Something made from hardwood or metal not harder than 2024 t3 treated
51
How is it possible to determine where fatugue might occur on aircraft structures
In places where repeated tress cycles occur
52
What are the three types of endoscope
Introscope, boroscope, fiberscope
53
What is anodising
Treating metals to form oxide coatings to improve performances of the metal
54
What’s secondary damage
55
When are injection seals used
To fill a channel. Or hole that occurs as a result of structural design
56
What’s a seal plane
The structural boundary on which the continuity of the seal is established
57
What’s a class a sealant
Brushable sealant
58
What’s a class B seal
A filleting sealant
59
What’s a class C sealant
A faying sealant
60
What’s a class D sealant
Hole filling sealant
61
What’s class E and f sealants
Sprayable sealants
62
At what Temperature will a sealant start bubbling when applied
120 degrees FARENHIET U STUPID CUNT NOT CELCIUS
63
What precautions must be made with silicone sealants
Should be stored separate from other sealants Should have separate tools used The use of mechanical freezers not CO2
64
What’s the three phase system used for applying silicone sealants
A brush coat is applied A small fillet seal is applied Final fillet seal applied
65
What type of seals are used for isolating fuel tank leakages
Faying surface seals
66
What’s used on fasteners to prevent leaking of liquids through fasteners
Small lightweight aluminium seal caps
67
What’s the maximum temperature a machine ,iced sealant compound can be stored at
-40 degrees FARENHIET U SILLT CUNY
68
How long Should you allow a sealant to thaw before use
5-10 mins in warm water Or 30 mins in room temperature
69
Why’s it important for a sealant to thaw before application
Because a cold sealant doesn’t adhere correctly
70
What’s solvent are commonly used to clear sealants
MEK
71
What should the temperature of the structure be thawed to before having a sealant applied to it
50 degrees FARENHIET

Kemble (39 decks)

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