M11.2

Question 1

What are the three aircraft structure classifications?

Answer 1

• primary structure
• secondary structure
• tertiary structure

Question 2

Where would you find out what structure classification a part is?

Answer 2

The AMM

Question 3

What is a primary structure?

Answer 3

A critical load bearing structure (landing gear, keel beam)

Question 4

What is a secondary structure?

Answer 4

They aren’t critical but should be repaired as soon as possible (access panels)

Question 5

What is a tertiary structure?

Answer 5

Anything that isn’t a that important to the airframe

Question 6

How is stress created?

Answer 6

By internal force of a substance which opposes or resists deformation

Question 7

How are structural members connected to each other?

Answer 7

Brackets, rivets, bolts, screws, and nuts

Question 8

What are the six major types a aircraft can have?

Answer 8

• tension
• compression
• torsion
• shear
• bending
• hoop stress

Question 9

What is hoop stress?

Answer 9

Stress caused due to pressurisation and depressurisation (just like your lungs)

Question 10

What are the three body coordinates (reference planes) that Boeing use?

Answer 10

• vertical axis (body buttocks)
• lateral axis or transverse axis (body water lines)
• longitudinal axis (body stations)

Question 11

Where do body stations get measured from?

Answer 11

In front of the aircrafts nose

Question 12

What is body buttock 0 indicate?

Answer 12

The centreline going down the fuselage

Question 13

Is the wing reference plane inclined with the dihedral of the wing?

Answer 13

Yes

Question 14

What is a nacelle?

Answer 14

Another word for engines

Question 15

Where is nacelle station 0 positioned?

Answer 15

In front of the engine

Question 16

Where is the nacelle waterline 0?

Answer 16

Below the engine

Question 17

What are the three body coordinates (reference planes) that airbus use?

Answer 17

• longitudinal axis (X)
• lateral axis (Y)
• vertical axis (Z)

Question 18

What are the different types of zones on an aircraft?

Answer 18

100- lower fuselage
200- upper fuselage
300- empennage (aft fuselage and stabilisers)
400- engines
500- left wing
600- right wing
700- landing gear
800- doors

Question 19

How are sub major zones identified?

Answer 19

The second digit of the number code

Question 20

How do you stop depressurisation from drain holes?

Answer 20

They have a spring that shuts them when pressurised

Question 21

What are the two types of lightning strike damage?

Answer 21

Direct damage - you can see the damage

Indirect damage - you cant see the damage

Question 22

Where are the two most likely places of lightning strike hitting?

Answer 22

The nose and the trailing edges

Question 23

How many grounds should be in fuel vapour ares?

Answer 23

Two

Question 24

What are the two general types of fuselage. Construction?

Answer 24

Truss type and monocoque type

Question 25

What are floorboards made from?

Answer 25

Honeycomb composite

Question 26

What attaches both wings together?

Answer 26

A wing box

Question 27

What is a nacelle?

Answer 27

The streamlined enclosure that holds the engine

Question 28

Hat are the three types of surface protection?

Answer 28

• pretreatment
• paint coatings
• special coatings

Question 29

What PH level and chloride level should water have for external cleaning?

Answer 29

PH of between 7 and 8 with chloride level less than 100ppm