7.18 Inspection & Repair Techniques Flashcards
What does ‘damage’ refer to in the Structure Repair Manual (SRM)?
A) A temporary change in shape
B) A cross-sectional area or permanent distortion of a structural member
C) A defect caused by corrosion
B) A cross-sectional area or permanent distortion of a structural member
What is a ‘defect’ in the context of the Structure Repair Manual (SRM)?
A) A minor crack in the structure
B) Any event or condition which reduces the serviceability of the aircraft
C) A minor dent with no impact on performance
B) Any event or condition which reduces the serviceability of the aircraft
What is a ‘gouge’ according to the Structure Repair Manual (SRM)?
A) A damaged area where the result is a cross-sectional change caused by a sharp object
B) A surface crack with no change in shape
C) A small dent with no significant structural effect
A) A damaged area where the result is a cross-sectional change caused by a sharp object
What is the classification for damage that is within acceptable limits?
A) Non-Allowable Damage
B) Allowable Damage
C) Non-Repairable Damage
B) Allowable Damage
What classification is given to damage that requires a repair?
A) Allowable Damage
B) Non-Allowable Damage
C) Non-Repairable Damage
B) Non-Allowable Damage
What classification is given to damage that requires replacement instead of repair?
A) Allowable Damage
B) Non-Allowable Damage
C) Non-Repairable Damage
C) Non-Repairable Damage
What magnification is typically used for viewing inside structures during inspection?
A) 8x
B) 10x
C) 20x
A) 8x
Which magnification is required to confirm a defect during inspection?
A) 8x
B) 10x
C) 20x
B) 10x
What magnification level is used for a stereoscopic magnifying glass?
A) 8x
B) 10x
C) 20x
C) 20x
What are common indicators of corrosion on a painted surface during visual inspection?
A) Scaly or blistered surface, change of color, blisters in the paint
B) Cracks and peeling paint
C) Dents and scratches
A) Scaly or blistered surface, change of color, blisters in the paint
What signs indicate corrosion on a metallic surface during visual inspection?
A) Pitted surface, dull or darkened area, white, grey, or red dust
B) Shiny surface with clean edges
C) Scratches and chips
A) Pitted surface, dull or darkened area, white, grey, or red dust
What is abrasion by hand best suited for during corrosion removal?
A) Removing heavy corrosion
B) Removing light corrosion
C) Polishing surfaces
B) Removing light corrosion
When is wire brushing used in corrosion removal?
A) To remove light corrosion from aluminum parts
B) To remove heavy corrosion, especially on steel components
C) To prepare painted surfaces for inspection
B) To remove heavy corrosion, especially on steel components
Why should wire brushing not be used on aluminum aircraft parts?
A) It creates scratches that cannot be repaired
B) It risks damaging the aluminum surface
C) It leaves steel debris that can cause further corrosion
B) It risks damaging the aluminum surface
Why should hot temperatures be avoided during grinding?
A) It can damage tools
B) It can change the mechanical properties of the material
C) It slows down the grinding process
B) It can change the mechanical properties of the material
What is abrasive blasting best suited for?
A) Removing filiform corrosion quickly
B) Smoothing surfaces for painting
C) Removing heavy corrosion from steel parts
A) Removing filiform corrosion quickly
Why should abrasive blasting be used externally?
A) To avoid generating excessive dust
B) To prevent FOD from being created
C) To ensure better lighting for inspection
B) To prevent FOD from being created
What tool should be used to inspect areas after abrasive blasting?
A) A magnifying glass with 10x magnification
B) A magnifying glass with 20x magnification
C) A stereoscopic microscope
A) A magnifying glass with 10x magnification
What must be done to any defective fasteners?
A) They should be coated with anti-corrosion treatment
B) They should be removed entirely
C) They should be tightened to proper torque specifications
B) They should be removed entirely
What is the most common type of corrosion found on carbon steel?
A) Black pitting
B) Rust (ferrous oxide)
C) Salt deposits
B) Rust (ferrous oxide)
How does corrosion on stainless steel and nickel chromium alloys typically appear?
A) As red rust
B) As black pitting
C) As white oxide
B) As black pitting
What causes corrosion on titanium alloys, and how is it identified?
A) Exposure to air, identified by red rust
B) Salt deposits and metal impurities, identified as black or white oxide
C) High temperatures, identified by cracks in the material
B) Salt deposits and metal impurities, identified as black or white oxide
What does “CAA” stand for, and what is it used for?
A) Chemical Acid Application
B) Chromic Acid Anodising
C) Conversion Acid Anodising
B) Chromic Acid Anodising
What does ELOXAL stand for, and what acid does it use as an electrolyte?
A) Electric oxidise aluminium; sulphuric acid
B) Electrolytic oxidation aluminium; chromic acid
C) Electrical oxide aluminium; nitric acid
A) Electric oxidise aluminium; sulphuric acid
What does “CCC” refer to in surface treatments?
A) Chromic Conversion Coating
B) Chemical Conversion Coating
C) Chemical Corrosion Control
B) Chemical Conversion Coating
What does “SAA” stand for, and what acid is used?
A) Sulphuric Acid Anodising; sulphuric acid
B) Surface Aluminium Anodising; chromic acid
C) Sulphur Acid Aluminium; sulphuric acid
A) Sulphuric Acid Anodising; sulphuric acid
How many layers are in the Airbus paint system?
A) 1 layer
B) 2 layers
C) 3 layers
C) 3 layers
How many layers of paint does Boeing typically use for the cabin and fuselage outer skin?
a) 1 layer
b) 3 layers
c) 2 layers
c) 2 layers
What are the types of surface protection repairs?
A) Fixing, polishing, buffing
B) Fixing, partial or total renewal, basic renewable
C) Patching, sanding, layering
B) Fixing, partial or total renewal, basic renewable
What does basic renewable paint finishing involve when dealing with heavily aged paint finishes with cracks?
a) Complete removal of the old paint
b) Applying a new layer of paint over the cracks
c) Only sanding the surface without removing the paint
a) Complete removal of the old paint
What should electrically conductive paints not be applied to?
a) Antennae covers
b) Aircraft wings
c) Engine parts
a) Antennae covers
What is the most commonly encountered water-displacing inhibitor manufacturer?
a) Dinitrol
b) 3M
c) Loctite
a) Dinitrol
What must be covered with electrically conductive paint on composite components?
a) 75% of all countersinks
b) 50% of all countersinks
c) 100% of all countersinks
a) 75% of all countersinks
What is sealing?
a) A process that confines liquids and gases within a given area or prevents them from entering areas from which they must be excluded
b) A process that allows liquids and gases to escape freely
c) A process to remove moisture from an area
a) A process that confines liquids and gases within a given area or prevents them from entering areas from which they must be excluded
What do seals protect against in acid areas?
a) Battery acid attack
b) UV radiation
c) Corrosion from saltwater
a) Battery acid attack
What colours are silicone compounds typically available in?
a) White, red, grey
b) Blue, green, yellow
c) Black, white, brown
a) White, red, grey
Where are silicone compounds used?
a) Where heat resistance is required
b) Where low temperature resistance is needed
c) Where flexibility is important
a) Where heat resistance is required
What colour can non-silicone compounds be?
a) Any colour
b) Red and green
c) Only black and white
a) Any colour
What is the “tack-free time” for sealants?
a) The time required for the sealant to cure sufficiently so it won’t transfer to the finger after thawing (for one-part silicones)
b) The time it takes for the sealant to dry completely
c) The time it takes for the sealant to become fully hardened
a) The time required for the sealant to cure sufficiently so it won’t transfer to the finger after thawing (for one-part silicones)
Which sealing method is applied with a brush?
a) Class A
b) Class B
c) Class C
a) Class A
What is the purpose of a Class B seal?
a) To prevent leaks at the edges of structural joints
b) To apply to one faying surface with a roller
c) To be sprayable
a) To prevent leaks at the edges of structural joints
What is the sealing method for a fraying surface seal (Class C)?
a) Applied with a roller to one faying surface
b) Applied with a brush
c) Sprayable
a) Applied with a roller to one faying surface
Which classes of seals are sprayable?
a) Class E & F
b) Class A & B
c) Class B & C
a) Class E & F
What type of sealing system is used for integral fuel tank sealing?
a) 2-phase system
b) 3-phase system
c) 4-phase system
b) 3-phase system
How many Class A and Class B seals are involved in the integral fuel tank sealing system?
a) 1x Class A, 1x Class B
b) 1x Class A, 2x Class B
c) 2x Class A, 1x Class B
b) 1x Class A, 2x Class B
What are the 4 levels of sealant?
a) Basic, Extensive, Intermediate, Limited
b) Absolute, Extensive, Intermediate, Limited
c) Absolute, Standard, Extensive, Limited
b) Absolute, Extensive, Intermediate, Limited
What type of freezers should be used for sealing materials?
a) Chemical freezers
b) Mechanical freezers
c) Cryogenic freezers
b) Mechanical freezers
What tools should be used for silicone sealant?
a) Any general-purpose tools
b) Tools used only for silicone sealants
c) Tools used for any type of material
b) Tools used only for silicone sealants
What should cutting tools for silicone sealants be made of?
a) Plastic or rubber
b) Hardwood or metal no harder than 2024-T3 aluminium
c) Stainless steel
b) Hardwood or metal no harder than 2024-T3 aluminium
