CASA 527/09 - Approval - compliance with Airworthiness Directive (AD) for Hartzell Propellers 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/casa-527-09-approval-compliance-with-airworthiness-directive-ad-for-hartzell-propellers