{"id":"F2009L03772","name":"AD/PMC/52 - Propeller Blade Erosion - CANCELLED","slug":"ad-pmc-52-propeller-blade-erosion-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":141661,"registerId":"commonwealth-F2009L03772-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PMC/52 - Propeller Blade Erosion - CANCELLED","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 20.2\ntitle: AIRCRAFT\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\n \n\nAIRWORTHINESS DIRECTIVE\n\nOn the effective date specified below, and for the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive AD/PMC/52.\n\n### Propellers - Variable Pitch - McCauley\n\n| AD/PMC/52 | Propeller Blade Erosion | 12/2009 DM |\n| --- | --- | --- |\n\n\n \n\n| Requirement: | CANCELLED. |\n| --- | --- |\n|  | This AD is cancelled on 27 October 2009. |\n| Background: | This directive has been superseded by AD/PMC/53. |\n\n\n![](image.001.png)\n\nDavid Villiers  Delegate of the Civil Aviation Safety Authority\n\n25 September 2009\n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1703},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This is an administrative revocation that does not expand or alter the substantive regulatory framework; it simply removes a superseded directive and directs compliance to the replacement AD/PMC/53."},"complexity_factors":["Single operative provision (cancellation)","No defined terms or interpretive sections","No conditional logic, cross-references, or exceptions"],"plain_english_summary":"This document cancels a previous aviation safety rule (**Airworthiness Directive AD/PMC/52**) that required maintenance checks for propeller blade erosion on certain aircraft.\n\n**What it does:**\n- Revokes the old directive effective **27 October 2009**\n- Tells aircraft operators and mechanics to stop following the old rules\n- Directs them to follow the replacement directive (**AD/PMC/53**) instead\n\n**Who it affects:**\n- Owners and operators of aircraft with McCauley variable-pitch propellers (the type covered by the original AD)\n- Licensed aircraft maintenance engineers\n\n**Why it matters:**\nThe cancellation avoids confusion by removing an outdated safety requirement that has been replaced by updated standards. Compliance is now governed solely by the new directive (AD/PMC/53)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pmc-52-propeller-blade-erosion-cancelled","history":"/api/acts/ad-pmc-52-propeller-blade-erosion-cancelled/history","analysis":"/api/acts/ad-pmc-52-propeller-blade-erosion-cancelled/analysis","conflicts":"/api/acts/ad-pmc-52-propeller-blade-erosion-cancelled/conflicts","importantCases":"/api/acts/ad-pmc-52-propeller-blade-erosion-cancelled/important-cases","documents":"/api/acts/ad-pmc-52-propeller-blade-erosion-cancelled/documents"}}