Aircraft Structural Repair & NDI Flashcards
Procedure for penetrant inspection (4)
Apply penetrant
Remove excess penetrant
Apply developer
Surface indication
Marks penetrating the surface that reduce the cross-sectional area but do not penetrate the complete thickness of the material are known as ____?
scratches
Disbonds are areas within the bonded surface between two adherents in which _____ has occurred
adhesion failure or separation
Delamination involves the _____
separation of layers
Types of Repairs: (5)
Insertion - Inserting a new section and splicing it to the affected member Replacement Negligible Patch Blending / Stop-Drill Repair
An eddy current probe ______ with the test material to detect eddy currents
must be in contact
Magnetic particle inspections can _________
detect near-surface and surface defects in ferromagnetic materials.
Structures with temporary repairs must be ______
replaced or repaired at the earliest opportunity.
_______ permits an aircraft to fly until the opportunity to carry out a permanent repair presents itself.
An acceptable defect
What flaw can penetrant inspection detect?
surface flaws
What can ultrasonic inspection detect?
surface and inter-surface defects in metals and composite materials.
What is the best method to inspect internal and inaccessible structural parts
radiography
What is used for visual inspection?
Borescopes [Boroscopes]
How are cracks formed?
Exposure to a corrosive environment while subjected to sustained tensile stress are known as stress corrosion cracks.
