CHAPTER 10 - AIRFRAME HUSBANDY

Question 1

PAINT REMOVAL
What procedures should be carried out when doing paint removal?
Include what to do if it comes in contact with your skin or eyes

Answer 1

1. Apply a barrier cream to the hands and all skin that the materials may touch
2. Do not let the material touch your skin or eyes
3. Put PVC protective clothes and chemical proof eye protection on
4. If material touch your skin: flush out immediately with clean cold water - if skin is red or burning, seek medical aid
5. If materials get into your eyes, flush out immediately with clean cold water for NO LESS than 10 minutes. Get medical aid immediately
6. Make sure your work area has a good air flow
7. Do not breathe in the fumes

Question 2

PAINT REMOVAL
Paint removers contain chlorinated-hydrocarbons, what are they mixed with in small quantities?

Answer 2

Solvents, thickeners, wetting agents, corrosion inhibitors and wax

Question 3

PAINT REMOVAL
Why is wax mixed into paint removers?

Answer 3

Decrease the rate at which the paint remover evaporates - helps keep solvents against the paint layer for longer

Question 4

PAINT REMOVAL
What is used to help seal joint/surfaces that the materials could cause damage?

Answer 4

With masking tape

Question 5

PAINT REMOVAL
What is the maximum time paint remover can be left on the surface?

Answer 5

1 hour

Question 6

PAINT REMOVAL
What three things effects how long a paint remover takes?

Answer 6

1. The number of layers of paint being removed
2. The length of time since the paint was applied
3. The type of paint

Question 7

PAINT REMOVAL
What area is someone of Depth A allowed to remove up to?

Answer 7

0.1m squared

Question 8

PAINT REMOVAL
Depth B, C and D can be done by a specialist trained paint and finisher tradesman who must hold a minimum of what?

Answer 8

Authority level B

Question 9

CLEANING OF SURFACES
What document is look at to clarify which chemical is used for cleaning?

Answer 9

Aircraft Document Set

Question 10

RESTORATION OF A DAMAGED SURFACE FINISH
What does SF mean?

Answer 10

Surface Finish

Question 11

RESTORATION OF A DAMAGED SURFACE FINISH
Give a small description of the following chemicals:
1. Alocrom 1200
2. Etch Primers
3. Epoxy primers and fillers

Answer 11

1. Alocrom 1200: Two-part solution. Process is the local treatment of aluminium and their alloys to repair a damaged anodic layer. Makes them more corrosion resistant and paint bond better
2. Etch Primers: Procedure roadies instruction on how to use water-repellent etch-primer. Gives metals a corrosion-resistant layer. Good base for an epoxy primer, a finish paint or a soluble nylon\
3. Epoxy Primers and Fillers: Procedure for how to use the green two-part chromates epoxy-primers. Primers are resistant to water and ester lubricants.

Question 12

RESTORATION OF A DAMAGED SURFACE FINISH
What materials are epoxy primers and fillers used on?

Answer 12

Magnesium Alloy
Aluminium Alloy
Copper based alloy
Steel
Glass Fibre reinforced plastic

Question 13

AIRCRAFT DECALS
Why are decals used?

Answer 13

Highlight safety information, danger areas, operation of handles/catches
Indicate refuelling points
Print oil/grease types adjacent to the components requiring them

Question 14

AIRCRAFT DECALS
Decals are elastomeric. What does this mean?

Answer 14

they can stretch and Alex with the airframe without tearing

Question 15

AIRCRAFT DECAALS
Where should Gloss decals be applied? Where should Matt decals be applied?

Answer 15

Gloss: onto a gloss or acrylic finish
Matt: to a matt or eggshell finish

Question 16

AIRCRAFT DECALS
What temperature is required before decals can be applied?

Answer 16

Temperature of more than 10 degrees

Question 17

AIRCRAFT DECALS
State the time limits before a decal can be applied when:
An epoxy or polyurethane paint finish is applied
An acrylic paint finish was applied

Answer 17

1. 16hrs
2. 24hrs

Question 18

AIRCRAFT DECALS
State the 8 steps when applying a decals to an aircraft..

Answer 18

1. Peel off the old decal
2. Repair paint finish if necessary
3. Clean teh surface
4. Pull backing paper off top edge of decal and position the decal before attaching the top edge
5. Peel the backing paper downwards by increments, rubbbing it down with a clean cloth to remove air bubbles
6. Push any remaining bubbles to the edge (if that doesn’t work, pop with a pin)
7. Clean teh surface of the decal with a small quantity of white spirits
8. Apply a layer of sealer with a soft brush to make a continuous seal

Question 19

AIRCRAFT DECALS
How long after cleaning should a decal be applied?

Answer 19

Applied less than 2 hours post cleaning

Question 20

AIRCRAFT DECAL
How thick should the seal be over the decal?

Answer 20

Continuous 6mm seal

Question 21

AIRCRAFT TAPES
What tape is used for anti fretting?

Answer 21

Skyflex

Question 22

AIRCRAFT TAPES
What tape can be used in the engine bay decking as a fire-resistant barrier?

Answer 22

Aluminium Tape

Question 23

AIRCRAFT TAPES
What is Polyurethane tape used for?

Answer 23

To protect the MRB leading edges from erosion due to bad weather/sandy conditions

Question 24

AIRCRAFT TAPES
Why is masking tape used?

Answer 24

As a temporary masking barrier

Question 25

AIRCRAFT TAPES
Which tape provides external and internal marking information, sometimes safety related?

Answer 25

Decal Tape

Question 26

AIRCRAFT ADHESIVE
What are the two chemical types of adhesives?

Answer 26

Thermoplastic
Thermosetting

Question 27

AIRCRAFT ADHESIVES
State the difference between thermoplastic and thermosetting..

Answer 27

Thermoplastic: Group of plastic materials that become elastic or melt when heated and return to their rigid state at room temperature

Thermosetting: Capable of being converted to a relatively infusible state by actions of heat, catalysts, UV light and similar means