Modern aerospace programmes frequently operate across multiple jurisdictions.
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An engine may be developed in one country, installed in another and operated globally.
Consequently, certification evidence often travels between authorities.
This process is known as validation.
What Is Validation?
Validation occurs when one authority evaluates certification findings generated under another authority’s system.
Examples include:
Validation supports international aircraft operations while maintaining sovereign regulatory oversight.
Although regulations are broadly similar, authorities retain independent responsibility for aviation safety.
Consequently:
Validation ensures these differences are properly assessed.
The Challenge for Fire Testing
Fire-testing programmes often rely on:
Differences in interpretation can affect whether evidence generated for one authority is considered sufficient by another.
The deep-dive highlights the importance of AC 21-16G.
This is FAA guidance.
While highly influential, it should not automatically be treated as an EASA position.
For EASA programmes, applicants must map evidence into the applicable CS-25, CS-E, AMC and guidance framework before assuming acceptance.
The Importance of Early Authority Engagement
One of the most effective methods of reducing validation risk is early engagement.
Key questions include:
These questions should be resolved before certification testing begins.
Validation authorities rarely focus solely on the test report.
They focus on traceability.
They want to understand:
The certification BOM.
Strong traceability simplifies validation.
Weak traceability creates risk.
Validation is not a paperwork exercise.
It is a technical process that confirms certification findings remain valid within a different regulatory framework.
Successful aerospace fire-testing programmes therefore begin by identifying not only the test method, but also the authorities, certification basis and validation strategy that will ultimately govern acceptance of the resulting evidence.
Resonate testing provides high quality fire, mechanical, and environmental test solutions and certification services across a wide range of industrial sectors. From Primes to SME’s, Resonate Testing provides a bespoke and tailored service to our clients.
Book fire testing. Use the contact route to share the requirement, test profile, drawings or specification for review.
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