FAA AC 20-136 EMC Testing for Avionics
The Federal Aviation Administration (FAA) Advisory Circular AC 20-136 provides guidelines for the electromagnetic compatibility (EMC) testing of avionics systems. This regulation is critical as it ensures that all electrical and electronic components in aircraft do not interfere with each other or with external signals, maintaining safety and operational reliability.
EMC testing under FAA AC 20-136 aims to prevent unwanted electromagnetic interference (EMI) from affecting avionics systems. This is achieved through a series of tests that evaluate the system's ability to function correctly in its electromagnetic environment without causing unacceptable interference to other equipment.
The testing process involves several stages, including preliminary design review, component-level testing, subsystem integration testing, and final system-level testing. Each stage ensures that any potential issues are identified early on, minimizing delays and costs later in the development cycle.
For preliminary design review, engineers analyze schematics and bill of materials to identify potential sources of interference. This phase is crucial for identifying design flaws before they become costly issues during later stages.
In component-level testing, individual parts are tested using specialized equipment such as anechoic chambers and Faraday cages. These tests ensure that each component meets the required standards for emission levels and susceptibility to electromagnetic interference.
Subsystem integration testing involves connecting multiple components into a larger system to evaluate how they interact with one another. This stage often reveals issues not apparent at lower levels of integration, allowing them to be addressed before full system-level testing.
The final system-level test simulates real-world operational conditions using environmental chambers and other equipment designed to mimic the electromagnetic environment encountered by aircraft in flight. This comprehensive evaluation confirms that the entire avionics suite operates safely and reliably under all expected operating conditions.
Passing FAA AC 20-136 EMC testing is essential for obtaining the necessary certifications required by aviation authorities worldwide. Compliance with these standards helps manufacturers meet regulatory requirements while enhancing product quality and safety.
To summarize, FAA AC 20-136 EMC testing plays a vital role in ensuring the safe and reliable operation of avionics systems within aircraft. By following this rigorous process, organizations can ensure their products comply with international standards and regulations, thereby protecting both passengers and crew members.
Benefits
- Ensures compliance with FAA AC 20-136 requirements.
- Maintains system reliability in harsh electromagnetic environments.
- Avoids costly rework by identifying issues early in the design process.
- Promotes product safety and enhances overall aviation industry standards.
- Facilitates smoother regulatory approval processes through proven compliance.
Industry Applications
| Aircraft Type | System Tested | Testing Methodologies |
|---|---|---|
| Commercial Passenger Aircraft | In-flight Entertainment Systems | Emission and Immunity Testing |
| Turboprop Aircraft | Avionics Control Panels | Interference Reduction Analysis |
| Business Jets | Cockpit Displays and Navigation Systems | Susceptibility Evaluation under Real-World Conditions |
Customer Impact and Satisfaction
Clients who choose our FAA AC 20-136 EMC testing services experience significant benefits:
- Reduced risk of non-compliance leading to costly delays.
- Increased confidence in product quality and safety.
- Better preparedness for regulatory inspections and audits.
- Potential reduction in warranty claims due to improved reliability.
