30 Questions
What is the most frequently used inspection method in aviation?
Visual Inspection
Why are multiple methods used in composite inspection and non-destructive testing?
To accurately determine the airworthiness of the structure
What is the purpose of determining the classification of damage in a composite structure?
To determine whether the damage is repairable or if the part must be replaced
Why is ongoing inspection necessary for composite structures?
To ensure any damages are identified promptly
What does thorough inspection of a damaged composite structure involve?
Inspecting beyond the immediately apparent defect
Which document outlines inspection procedures, damage classification factors, and recommended repair methods for composite structures?
Manufacturer’s Structural Repair Manual
What could happen if moisture enters the core structure of a composite material along with airflow?
It could cause a small delamination.
Why are bolted and bonded surface patches not usually recommended for composite repairs?
They do not restore the strength characteristics of the original structure.
What is the purpose of resin injection repairs in composite materials?
Filling holes or voids by injecting resin into damaged areas.
Which type of damage would require repair procedures ranging from surface scratches to damage extending through all internal plies and core honeycomb material?
Damage extending through all internal plies and core honeycomb material.
Why might tiny holes, known as pinholes, in the skin surface of composites be dangerous?
They may not be easily detected but can lead to extensive damage.
What is the main reason why resin injections are usually performed on non-structural parts during repairs?
To fill holes or voids in non-structural components.
What is the most desirable type of permanent repair for composite structures?
Laminating new repair plies in the damaged area
What is the purpose of defining the repair procedure in composite repairs?
To ensure the structural integrity of the repair
What role does NDI play in the damage assessment and repair process of composites?
It is used to inspect the repair site for structural integrity
How do potted repairs differ from core material plugs in composite repairs?
Core material plugs add weight and decrease flexibility
What is the final step in the composite damage assessment and repair process?
Documenting the repair
Why does filling a hole with a resin-and-filler mixture impact the repaired part?
It decreases flexibility and adds weight
How can laminate damage that runs through all laminate layers be repaired?
Using a step-cut repair from one side of the part to the other
What should be considered when repairing laminate damage according to the text?
The manufacturer's repair manual for limitations
What is the purpose of a surface patch and backing plate in the repair process?
To strengthen the repair and provide support
How does the repair method differ for thicker laminate structures according to the text?
Thicker laminates use a modified two-sided step-cut repair
What is the result of performing a two-sided step-cut repair on a five-layer laminate according to the text?
A patch that is larger than if a one-sided repair was performed
What is illustrated in View B of the laminate repair process?
A two-sided step-cut repair that meets in the middle
What is the primary reason sandwich structures are vulnerable to impact and puncture damage?
Delaminations in the face sheets
When is potted repair suitable for sandwich structure damage?
For damage up to 1 in. in diameter
What orientation should the grain of a balsa wood plug have when used for sandwich structure repairs?
Perpendicular to the skin
What type of core material should be used if honeycomb material is selected for sandwich structure repairs?
Same density as the original
Which of the following is NOT a common type of sandwich structure repair mentioned in the text?
Composite honeycomb plug bonding
In sandwich structure repairs, why is it crucial to cut a balsa wood or composite honeycomb plug with care?
To prevent delaminations
Test your knowledge on composite inspection techniques and non-destructive testing (NDT) methods used for determining the airworthiness of structures, with a focus on composite applications and ongoing inspection intervals.
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