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Cat B- Mod 11 Aircraft Systems > 11.2.b Structures General > Flashcards

11.2.b Structures General Flashcards

1
Q

What is a frame or former?

A

Lateral fuselage giving cross sectional shape

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2
Q

How is the strength/weight issue overcome in monocoque structures?

A

Semi-monocoque using stringers

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3
Q

What is a bulkhead?

A

Gives shape to the fuselage, usually to close off or partition.

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4
Q

What is a longeron?

A

Main lengthwise member, they take the primary bending load.

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5
Q

What is a stringer?

A

Smaller and lighter than a longeron, they serve as stiffeners.

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6
Q

What is a doubler?

A

Additional section of material used to reinforce skin areas.

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7
Q

What are some doublers also known as?

A

Crack stoppers

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8
Q

What are struts?

A

Load bearing components that handle compression forces

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9
Q

What is a tie also known as?

A

Tie rod or tension member.

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10
Q

What are floorboards made of?

A

Honeycomb composite

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11
Q

What happens to the floorboards in wet areas?

A

They are sealed.

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12
Q

What methods are there of strengthening aircraft structure?

A

Butt straps
Cleats
Gussets
Fishplates
Angles

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13
Q

What are the two types of fuselage construction?

A

Truss type
Monocoque type

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14
Q

What is a trussed framed fuselage often covered with?

A

Fabric

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15
Q

In a true monocoque construction what is the primary load carrier?

A

Skin

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16
Q

What is a stressed skin structure?

A

The loads are shared between the skin and frame

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17
Q

What methods are there of skinning?

A

Sheet metal wrapped
Filament wound
Preformed

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18
Q

What is the wingbox?

A

The wing box is designed to provide support and rigidity to the wings and is supported by heavy frames and a “keel beam.”

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19
Q

What else does the wing box help with?

A

Absorb impacts sustained during events like turbulence and it may form part of an integral fuel storage system.

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20
Q

How is the engine pylon usually constructed?

A

Frame and skin

21
Q

What is an advantage of adhesively bonding?

A

Spreads the loads

22
Q

What is the type of surface protection related to?

A

Material
Function
Location

23
Q

What are the three groups of protective treatment?

A

Pre-treatment
Paint
Special coatings

24
Q

What are some of the pre-treatments?

A

Passivation
Sacrificial coatings
Chemical film
Electroplating

25
Q

What describes the method of cleaning and prep of a surface?

A

DEF STAN 03-2/1

26
Q

What is chromating?

A

Process that produces a protective oxide film and has a golden yellow appearance.

27
Q

What is the most common chromate type?

A

Potassium Dichromate solution

28
Q

Before painting magnesium what must be done?

A

Special treatment

29
Q

What is the most common type of paint?

A

Polyurethane

30
Q

What temp must paint be applied in?

A

15-25 degrees c

31
Q

What is a type 1 special coating?

A

Water repellent coating generally made from silicone free materials

32
Q

What is a type 2 special coating?

A

Heavy duty corrosion preventative compound, grease like coating

33
Q

What are the three methods of cleaning an aircraft?

A

Wet
Dry
Polishing

34
Q

What does a wet wash remove?

A

Oil, grease, or carbon and most dirt.

35
Q

When is dry washing applicable?

A

For removal of aircraft film, dust or small accumulations.

36
Q

What does polishing do?

A

Restore the brightness/colour.

37
Q

What can chlorinated solvents not be used for?

A

Interior cleaning.

38
Q

What must happen to thick mud, grease or oil?

A

Removed by hand.

39
Q

What is necessary after washing?

A

To re-lubricate.

40
Q

How are exhaust gases cleaned off?

A

Dilution with water or white spirit and applied with a non-atomising spray.

41
Q

How is snow and ice chemical salts cleaned off?

A

Clean water

42
Q

What must happen to contaminated plastic foam?

A

Renewed.

43
Q

What is necessary after the carriage of livestock?

A

Thorough internal clean, with particular attention to the bilge areas.

44
Q

How is misalignment found?

A

Performing a symmetry test and alignment check.

45
Q

When must an alignment check be carried out?

A

Major structural repair
Severe conditions
Flight crew reports of unusual characteristics.

46
Q

What alignment checks are specified?

A

Dihedral angle
Incidence angle
Verticality of the fin
Engine alignment
Symmetry check
Horizontal stab incidence

47
Q

Where is incidence checked?

A

At least two specified positions

48
Q

If the angle of incidence is correct what will the inclinometer read?

A

0

49
Q
A

Cat B- Mod 11 Aircraft Systems (28 decks)

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