{"id":"F2006B06180","name":"AD/PFP/6 - McCauley Propellers - Modification","slug":"ad-pfp-6-mccauley-propellers-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47031,"registerId":"commonwealth-F2006B06180-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PFP/6 - McCauley Propellers - Modification","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 - Fixed Pitch\n\n \n\nAD/PFP/6 McCauley Propellers - Modification NK\n\nApplicability: All McCauley model 1B235/BFA7862 fitted to Beech model A23-24 aircraft. Document:               McCauley SB No. 67.\n\nCompliance: Before installation in an aircraft following next overhaul completed after 11 July 1968.\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\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":1856},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow, specific scope targeting only McCauley model 1B235/BFA7862 propellers installed on Beech A23-24 aircraft. It has not expanded beyond this specific safety modification requirement for this particular hardware configuration."},"complexity_factors":["Extremely brief instrument with only three substantive clauses (Applicability, Document, Compliance)","No defined terms or interpretation section","Single external reference (McCauley SB No. 67)","Linear temporal trigger with no exceptions or nested conditions","Specific applicability limited to one propeller model on one aircraft type"],"plain_english_summary":"This Airworthiness Directive (AD) mandates a safety modification for specific aircraft propellers to ensure they remain airworthy.\n\n**What it requires:**\nAny McCauley model 1B235/BFA7862 propeller fitted to a Beech A23-24 aircraft must undergo the modification detailed in **McCauley Service Bulletin No. 67** (an official manufacturer repair instruction) before being returned to service.\n\n**When it applies:**\nThe modification is required **before installation** in an aircraft if the propeller has just completed an overhaul performed after **11 July 1968**.\n\n**Who is affected:**\n- Owners and operators of Beech A23-24 aircraft equipped with these specific propellers\n- Aircraft maintenance organisations overhauling or reinstalling these propeller models\n\nIn practical terms, if you are putting one of these propellers back on a plane after servicing it (and that servicing happened after mid-1968), you must perform this factory-specified update first."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pfp-6-mccauley-propellers-modification","history":"/api/acts/ad-pfp-6-mccauley-propellers-modification/history","analysis":"/api/acts/ad-pfp-6-mccauley-propellers-modification/analysis","conflicts":"/api/acts/ad-pfp-6-mccauley-propellers-modification/conflicts","importantCases":"/api/acts/ad-pfp-6-mccauley-propellers-modification/important-cases","documents":"/api/acts/ad-pfp-6-mccauley-propellers-modification/documents"}}