Cleaning and corrosion control Flashcards

1
Q

Is there any requirement for cleaning an aircraft prior to an annual or 100 inspection?

A

Yes, in accordance with FAR part 43 appendix D

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2
Q

Discuss the general precautions that should be observed when washing an airplane

A

Avoid or protect areas which may be damaged or contaminated, such as pitot tubes and static tubes hinges, sealed areas and bearings

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3
Q

What are some of the more common light duty cleaning agents?

A

Soap or detergent and water

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4
Q

What materials are commonly used as heavy duty cleaners

A

Solvents, and emulsions

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5
Q

What are the preferred cleaners for plastic surfaces such as windshields?

A

Mild soap in water or manufacture, approved, cleaners

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6
Q

What type of cleaning agents should be used to remove grease oil or fuel from aircraft tires?

A

Soap and water

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7
Q

Give examples of the factors that cause or influence corrosion

A

Environmental conditions, dissimilar metals, type of metal

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8
Q

Name the different types of corrosion that can be found on an aircraft

A

Fretting, exfoliation, filiform, pitting surface intergranular

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9
Q

What is the cause of filiform corrosion

A

Improper or incomplete, caring of a wash primer prior to painting

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10
Q

What is a visible signs of filiform corrosion?

A

Blistered paint surfaces

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11
Q

What are the two primary factors that may cause development of stress corrosion

A

It corrosive environment and sustained tensile stress

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12
Q

What are the areas of an aircraft that are prone to corrosion?

A

Battery compartments, bag bin, galleys, landing gear, wing flap, lavatories, end, any areas that can and trap water

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13
Q

What is another name for corrosion caused by contacted dissimilar metals

A

Galvanic corrosion

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14
Q

The lifting and flaking of a metal surface due to the buildup of corrosion products as a result of severe intergranular corrosion is an indication of what form of corrosion

A

Exfoliation

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15
Q

What are the visible signs of fretting corrosion?

A

The corrosion residue has a dark, smoky appearance streaming back from rivet heads

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16
Q

What type of corrosion causes a smoking rivet?

A

Fretting corrosion

17
Q

What is the most common type of corrosion?

A

Surface corrosion

18
Q

What form or corrosion is an attack along the grain boundaries of an alloy that is usually caused by improper heat treatment

A

Intergranular corrosion

19
Q

What type of corrosion can be found in battery compartment?

A

Direct, chemical, attack or chemical corrosion

20
Q

Where is stress corrosion most likely to occur on an aircraft

A

In any metal component that is continually under a tensile stress, the metal around holes in casting that are fitted with pressed and bushings are suspectible to stress corrosion

21
Q

Where is intergranular corrosion most likely to occur on an aircraft

A

A long grain boundaries of aluminum alloys that have been improperly he treated. Extruded aluminum alloy suspectible to intergranular corrosion.

22
Q

Why are piano type hinges prime spots for corrosion?

A

The steel pin an aluminum hinge material are dissimilar metals in the hinge design tends to trap, moisture and contaminants

23
Q

What is the best way to protect piano hinges from

A

Keep them clean and properly lubricated

24
Q

What are corrosion preventative measures for aircraft?

A

Cleaning, lubrication treatment, sealing, inspection

25
Q

Describe the tools that should be used to remove corrosion from anodized aluminum surfaces

A

Nylon scrub pads such a scotch Brite bristle brushes, aluminum wool aluminum wire brush

26
Q

Describe the tools that should be used to remove corrosion from titanium

A

Stainless steel wool or brushes, scotch, bright, abrasive blast with glass beads

27
Q

What is the purpose of Alodine

A

Alodine is a chemical process that deposits, a protective film on aluminum alloys the film improves, corrosion resistance, and paint adhesion

28
Q

For what reason should you avoid cleaning anodized aluminum services with aluminum metal polish?

A

Aluminum metal polish should not be used on anodize aluminum surfaces because it will remove the anodized coating

29
Q

Why should aircraft fabrics in plastics be cleaned only with recommended cleaners

A

Recommended cleaners cause the least amount of deterioration or damage

30
Q

Describe the effects of using steel brushes or steel wool to remove corrosion from aluminum surfaces

A

Steel brushes or steel wool must not be cleaned Aluminum because the steel particles can be embedded in the aluminum and cause corrosion

31
Q

How was the inside of a structural steel tubing protected from corrosion?

A

The tubing is filled with hot linseed oil and then drained

32
Q

What are the two types of surface treatments used on aluminum surfaces

A

Anodizing in anodizing

33
Q

What can be used to repair the anodize surface on an aluminum alloy part?

A

Chemical conversion coding, such as Alodine

34
Q

What solvent is recommended for removing grease from aircraft fabric prior to doping it

A

(MEK) methyl ethyl ketone or lacquer thinner

35
Q

What is used to neutralize the electrolyte from a lead acid battery that has been spilled on an aircraft structure

A

Is solution of boric acid and water or vinegar