AC 21.17-4
FAA guidance for type, production and airworthiness certification of powered-lift under the special-class pathway.
Track aircraft certification progress and understand the regulatory frameworks, airworthiness rules and technical standards behind electric flight.
Selected documents spanning powered-lift certification, electric propulsion requirements and technical compliance evidence.
FAA guidance for type, production and airworthiness certification of powered-lift under the special-class pathway.
EASA's performance-based airworthiness framework for electric and hybrid propulsion systems.
Guidance for endurance substantiation of electric and hybrid propulsion systems, referenced by EASA for electric-engine endurance demonstration.
A compact map of the document families represented in PropulsionWatch today.
Long-form analysis connecting certification frameworks to aircraft programmes, operations and evidence.
How the US and European frameworks address pilots, operations, continuing airworthiness and cross-market compliance.
Read analysis → CERTIFICATION EXPLAINERProduction, operator authority, qualified crews, maintenance, infrastructure and airspace after design approval.
Read analysis → CERTIFICATION EXPLAINERA practical guide to certification bases, means of compliance, conformity evidence and testing under FAA and EASA frameworks.
Read explainer → CERTIFICATION ANALYSISHow ANAC-led international validation for Eve differs from EHang's CAAC-approved pilotless-aircraft framework.
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