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Current Issue Papers and associated Special Conditions applied on e-enabled aircraft have been focused only on Part 25. However, propulsion – engines and propellers – have independent Type Certificates and may have their own external interfaces that need to be considered from a cybersecurity perspective. This paper analyzes the current rulemaking environment and the recent rules issued by EASA on their equivalents to Part 25, 33 and 35. Recommendations have been issued to adopt a similar rulemaking scheme and to apply appropriate Issue Papers until rules have been published.

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