{"id":"F2006B06299","name":"AD/PMC/44 - Oil Filled Hub","slug":"ad-pmc-44-oil-filled-hub","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47394,"registerId":"commonwealth-F2006B06299-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PMC/44 - Oil Filled Hub","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/44 Oil Filled Hub 9/95\n\nApplicability: All McCauley 2A37C223-[X]B/90RB-[X] propellers installed on, but not limited to, Beech Debonair and Beech Bonanza 35 and 36 series aircraft.\n\n \n\nRequirement: Unless previously carried out action in accordance with McCauley Service Bulletin 208A.\n\n \n\nNote: FAA AD 95-09-08 amdt 39-9211 refers.\n\n \n\nCompliance: Within 50 hours time in service after 17 August 1995 or by 31 December 1995, whichever occurs first.\n\n \n\nBackground: This directive is being raised after receipt of Country of Origin AD.\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":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"There is no indication in the provided text that the AD expands or narrows scope from the original corrective action cited. The directive implements the Country of Origin action by requiring compliance with McCauley Service Bulletin 208A for all listed McCauley propellers and explicitly states the applicability is not limited to the named aircraft (Applicability, Requirement, Background). The instrument therefore appears to mirror the origin AD and the manufacturer’s service bulletin rather than change substantive scope."},"complexity_factors":["Dependence on an external document (McCauley Service Bulletin 208A) for technical detail rather than including specifics in the directive (Requirement).","Short and absolute compliance window (50 flight hours or by a calendar date), creating scheduling and operational pressures (Compliance).","Applicability language that names examples but is open-ended ('installed on, but not limited to'), requiring operator verification of propeller model on each aircraft (Applicability).","Cross-reference to foreign regulatory action (Country of Origin AD and FAA AD), which requires coordination or reconciliation with external authorities' documentation (Background, Note).","No technical or enforcement detail in the AD text itself; determination of satisfactory compliance depends on maintenance records and regulator oversight (Requirement, Compliance)."],"plain_english_summary":"This AD requires operators of aircraft fitted with McCauley propellers model 2A37C223-[X]B/90RB-[X] (including but not limited to certain Beech Debonair/Bonanza 35–36s) to carry out the corrective work specified in McCauley Service Bulletin 208A within the short compliance window. It affects owners, operators and maintenance organisations (who bear costs and scheduling burden) and mirrors corrective action taken by the propeller’s country of origin and the FAA."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive targeting a specific mechanical issue with specific propeller models. It has not expanded beyond its original purpose of mandating a particular maintenance action."},"complexity_factors":["Very short document (approximately 150 words of substantive content)","Only one defined term of note: 'time in service' (standard aviation term)","Single, clear compliance requirement with reference to external technical document (Service Bulletin 208A)","No nested exceptions or conditional logic — straightforward 'unless already done, do this by this date' structure","Minimal cross-referencing (only one reference to corresponding FAA AD)"],"plain_english_summary":"**What this is:** This is an Airworthiness Directive (AD) — essentially a mandatory safety notice issued by Australia's Civil Aviation Safety Authority (CASA).\n\n**What it does:** It requires owners and operators of specific McCauley propellers (model 2A37C223-[X]B/90RB-[X]) to carry out maintenance actions outlined in McCauley Service Bulletin 208A. These propellers are commonly found on Beech Debonair and Beech Bonanza 35/36 series aircraft.\n\n**Why it matters:** The directive addresses a safety issue with \"oil filled hub\" propellers. Without the required maintenance, there could be a risk of propeller failure — which, in flight, could be catastrophic.\n\n**Who must act:** Anyone operating an aircraft with these specific propellers installed.\n\n**When it had to be done:** By the earlier of either (a) 50 flight hours after 17 August 1995, or (b) 31 December 1995.\n\n**Key point:** This AD was issued because the United States (the \"Country of Origin\") had already issued a similar safety directive (FAA AD 95-09-08). Australia followed suit to maintain equivalent safety standards."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pmc-44-oil-filled-hub","history":"/api/acts/ad-pmc-44-oil-filled-hub/history","analysis":"/api/acts/ad-pmc-44-oil-filled-hub/analysis","conflicts":"/api/acts/ad-pmc-44-oil-filled-hub/conflicts","importantCases":"/api/acts/ad-pmc-44-oil-filled-hub/important-cases","documents":"/api/acts/ad-pmc-44-oil-filled-hub/documents"}}