Aerospace component manufacturing combines demanding safety requirements with specialised production methods. Electronics manufacturers need to understand the relevant quality and qualification expectations before accepting work in this sector. This article provides an industry overview; it does not establish that Techbit holds the aerospace approvals or offers every process discussed.
1. Standards and certification: supporting aerospace safety
Aerospace standards and regulatory requirements are demanding because component conformity and reliability can affect flight safety.
AS9100: aerospace quality management
AS9100 is part of the 9100 family of quality-management standards for aviation, space and defence organisations. It builds on ISO 9001 with sector-specific requirements, including:
- Risk management
- Controlled process documentation
- Product safety and reliability considerations
For an electronics manufacturer considering aerospace work, the applicable quality-system requirements and customer qualification route need to be established. AS9100 certification should not be assumed from general electronics experience.
Nadcap: accreditation of critical processes
Nadcap is an industry-led accreditation programme for aerospace critical processes and products. Its areas include:
- Heat treatment
- Coatings
- Chemical processing
- Non-destructive testing
Customers may require Nadcap accreditation for particular processes. The requirement depends on the contract and the work being supplied.
FAA and EASA: aviation regulators
The US Federal Aviation Administration (FAA) and the European Union Aviation Safety Agency (EASA) oversee relevant aviation approvals. Examples of approval routes include:
- Production Organisation Approval (POA) under the European Part 21 framework
- FAA Parts Manufacturer Approval (PMA) for modification and replacement articles
These approvals have defined purposes and scopes. They are not interchangeable, and not every subcontractor needs both. The applicable route must be established for the particular product, activity and supply arrangement.
2. Materials and technologies in aerospace
Material selection depends on the component and its application. Common considerations include:
- Strength relative to weight
- Operating-temperature resistance
- Corrosion and fatigue performance
Aluminium alloys: weight and strength
Alloys such as 2024 and 7075 are used in aerospace structures where their mechanical properties suit the design. Electronic-system enclosures may also use qualified aluminium constructions. The alloy, finish and manufacturing method need to meet the product specification.
Composites: design opportunities
Carbon-fibre-reinforced polymers (CFRP) and other composites offer useful properties in appropriate applications, including:
- Low weight
- High specific strength
- Fatigue performance dependent on the construction and loading
For electronic systems, composite enclosures require assessment of mechanical, thermal and electromagnetic requirements. Their suitability cannot be inferred from low weight alone.
Superalloys: demanding temperature conditions
Superalloys such as selected Inconel or Hastelloy grades are used where high-temperature or corrosion performance is required. Their allowable conditions depend on the grade, loading and application; a single temperature limit does not describe the whole material family.
3. Key manufacturing processes
Aerospace components require manufacturing processes qualified for the drawing, material and acceptance criteria.
CNC machining: controlled precision
Computer numerical control (CNC) machining is widely used for aerospace parts. It can support:
- Complex geometries within specified tolerances
- Repeatable production
- Prototype manufacture
Precision enclosures and mounting parts for avionics may require CNC machining. This is a separate capability to confirm with the relevant mechanical supplier.
Additive manufacturing
Additive manufacturing, including 3D printing, provides options such as:
- Geometries difficult to produce using conventional methods
- Weight optimisation through suitable design
- Rapid prototypes and design iterations
Potential electronics-related uses include enclosures and heat sinks. Aerospace production requires appropriate material, process and part qualification rather than treating a prototype method as an approved production process.
Joining methods
Aerospace manufacturing uses several joining methods:
- Electron-beam welding for suitable precision joints
- Structural adhesive bonding for appropriate composite constructions
- Riveting for many metal structures
Each method requires specialist expertise, a controlled process and the relevant inspection.
4. Quality control and safety
Quality control is essential in aerospace component manufacturing and must address the particular product's requirements.
Non-destructive testing (NDT)
NDT examines components without intentionally damaging them. Methods used in the industry include:
- Ultrasonic testing
- Radiographic inspection
- Penetrant testing
- Eddy-current testing
In electronics assembly, X-ray inspection can help assess hidden connections. The appropriate NDT method, equipment and qualified personnel depend on the part and required coverage.
Traceability
Aerospace supply chains require defined traceability and controlled records. Depending on the product and contract, these may include:
- Material-batch identification
- Manufacturing-process records
- Test and inspection results
An electronics supplier needs to confirm which records it can provide and whether they meet the customer's traceability requirements.
5. Innovation and the future of the sector
Aerospace manufacturing continues to develop its technologies and production methods.
Industry 4.0 in aerospace manufacturing
Connected production concepts have applications such as:
- Internet of Things (IoT) monitoring of production processes
- Data analysis for process improvement
- AI-supported inspection and predictive maintenance
Manufacturers considering these tools need to assess validation, data quality and integration within the relevant quality system.
Sustainability
Environmental performance creates additional priorities for component manufacturers:
- Reducing production-related greenhouse-gas emissions
- Using suitable recycled materials where permitted
- Considering end-of-life treatment during design
These approaches need to remain consistent with material specifications, airworthiness and customer requirements. Environmental benefits should be supported by evidence.
Conclusion
Aerospace component manufacturing combines specialised technologies with rigorous safety and qualification requirements. It can offer opportunities for electronics suppliers that establish a suitable, approved scope of work.
Important foundations include:
- Meeting applicable standards and contract requirements
- Investing in relevant technologies and processes
- Maintaining a clear commitment to quality and product safety
- Responding to changing technical and customer requirements
General electronics capability alone does not establish suitability for an aerospace application. Before selecting a supplier, verify its certifications, processes, traceability and acceptance scope against the particular design.
Contact Techbit to discuss an electronics assembly requirement. Our team can review the documentation and clarify which work is within the confirmed manufacturing scope.
Frequently asked questions
- How do you become an aerospace supplier? Entry requires planning and investment. Relevant steps include:
- Establishing the required quality-system and process qualifications, such as AS9100 or Nadcap where applicable
- Investing in suitable equipment and validated processes
- Developing a team with the necessary aerospace competence
- Building relationships with customers and qualified partners
- What mistakes do new aerospace suppliers make? Common risks include:
- Underestimating documentation and traceability requirements
- Insufficient investment in appropriate quality controls
- Reducing cost at the expense of required conformity
- Misunderstanding sector requirements or the scope of applicable approvals
- Can small businesses work in aerospace? They can participate when their scope and qualifications match customer needs, particularly if they:
- Specialise in a defined product or process
- Respond effectively to changing requirements
- Invest in relevant technical development
- Build reliable relationships with customers and other suppliers
Further topics to explore:
- IoT applications in manufacturing
- Electronics inspection and testing
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