{"id":"F2006B06275","name":"AD/PMC/12 Amdt 3 - Propeller Hub - Replacement","slug":"ad-pmc-12-amdt-3-propeller-hub-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47308,"registerId":"commonwealth-F2006B06275-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PMC/12 Amdt 3 - Propeller Hub - Replacement","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Propellers - Variable Pitch - McCauley\n\n \n\nAD/PMC/12\n\nAmdt 3\n\n\nPropeller Hub - Replacement 11/71\n\n \n\nApplicability: McCauley propellers installed in rear position of Cessna 336 aircraft as follows:\n\n \n\n(a)     All model D2AF34C56 series; and\n\n \n\n(b)     All model D2AF34C61 series prior to model D2AF34C61-J not incorporating AD/PMC/20 (SB 88 refers).\n\n \n\nRequirement: Remove propeller hub from service.\n\n \n\nNote: Propeller hubs which are removed from service in accordance with this requirement may be re-used after incorporation of AD/PMC/20 (SB. 88).\n\n \n\nCompliance: Before propeller hub exceeds 500 hours total time in service.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1546},"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment maintains the directive's original narrow scope targeting specific McCauley propeller models installed on Cessna 336 aircraft. It does not expand applicability to new aircraft types or propeller models beyond those originally identified."},"complexity_factors":["Cross-references to separate airworthiness directive (AD/PMC/20) and service bulletin (SB 88) for remediation path","Technical model number granularity requiring precise identification of propeller series and dash numbers","Conditional applicability based on prior modification status and specific engine mounting position (rear vs front)","Compliance measured against \"total time in service\" flight hours metric"],"plain_english_summary":"This airworthiness directive requires owners/operators of Cessna 336 aircraft fitted with McCauley rear (pusher) propeller hubs of certain D2AF34C56 or earlier D2AF34C61 series to remove those hubs before they reach 500 flight hours. It life-limits the affected hubs to prevent possible catastrophic hub failure. Hubs removed under this AD may be returned to service only if later modified per the separate AD/PMC/20 (Service Bulletin 88)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pmc-12-amdt-3-propeller-hub-replacement","history":"/api/acts/ad-pmc-12-amdt-3-propeller-hub-replacement/history","analysis":"/api/acts/ad-pmc-12-amdt-3-propeller-hub-replacement/analysis","conflicts":"/api/acts/ad-pmc-12-amdt-3-propeller-hub-replacement/conflicts","importantCases":"/api/acts/ad-pmc-12-amdt-3-propeller-hub-replacement/important-cases","documents":"/api/acts/ad-pmc-12-amdt-3-propeller-hub-replacement/documents"}}