AD/ROTAX/18 - Replacement of Valve Spring Retainers of Engines in Single Valve Spring Configuration Zoe has a public metadata record for this legal instrument, but accepted source text is not available in the agent mirror yet. Canonical page: https://zoelaw.ai/legislation/ad-rotax-18-replacement-of-valve-spring-retainers-of-engines-in-single-valve-spring-configuration