{"id":"F2006B06316","name":"AD/PR/18 - Hub and Driving Centre Assembly - Inspection of Cadmium Plating","slug":"ad-pr-18-hub-and-driving-centre-assembly-inspection-of-cadmium-plating","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47449,"registerId":"commonwealth-F2006B06316-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PR/18 - Hub and Driving Centre Assembly - Inspection of Cadmium Plating","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 - Dowty Rotol\n\n \n\nAD/PR/18 Hub and Driving Centre Assembly - Inspection NK\n\nof Cadmium Plating\n\n \n\nApplicability: Models R193/4-30-4/50 and R193/4-30-4/61 with S/Nos. as listed in the requirement document.\n\n \n\nDocument: Dowty Rotol SB No. 61-882. Compliance:  As detailed in the requirement document.\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":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive itself does not state any change of scope from a prior instrument or from an original intent. It prescribes an inspection for cadmium plating on a specified component for named models and serial numbers and delegates procedural detail to the cited service bulletin (see \"Applicability\", \"Document\", and \"Compliance\"). No information in the text indicates an expansion or contraction of scope relative to an earlier measure."},"complexity_factors":["References an external document (Dowty Rotol SB No. 61-882) for procedural detail, so the directive itself is brief and procedural complexity is offloaded to that document (see \"Document\" and \"Compliance\").","Applicability limited to specific models and serial numbers requires cross-checking a separate list, adding administrative steps to determine who must comply (see \"Applicability\").","Technical subject matter (inspection of cadmium plating on hub and driving centre assembly) implies specialised maintenance capability and judgement in execution.","Regulatory text provides the mandate but not the inspection method or schedule, creating potential compliance uncertainty unless the service bulletin is consulted (see \"Compliance\").","Short, terse format means legal and operational detail is concentrated in the referenced service bulletin rather than in the directive text."],"plain_english_summary":"This directive, issued by the Civil Aviation Safety Authority, requires operators of specified Dowty Rotol variable‑pitch propellers (two models, listed serial numbers) to inspect the cadmium plating on the hub and driving‑centre assembly. Compliance procedures and timing are set by Dowty Rotol Service Bulletin No. 61‑882. It targets a limited subset of propellers, shifting inspection, any necessary repairs, and associated costs and downtime onto the owners/operators who must obtain and follow the service bulletin."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow Airworthiness Directive targeting a specific technical defect in specific propeller models. It reflects the original purpose of Part 39 of the Civil Aviation Regulations — issuing mandatory safety directives for particular aircraft components. No scope creep is evident."},"complexity_factors":["Extremely short document (approximately 150 words)","No defined terms section — relies entirely on external reference to Dowty Rotol SB No. 61-882","Single, clear applicability clause with specific model and serial number targeting","No conditional logic, exceptions, or nested provisions","Simple command structure: identify affected aircraft, reference external document, require compliance"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** issued by Australia's Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations 1998. It mandates a specific safety inspection for certain aircraft propellers.\n\n**What it does:**\n- Requires owners and operators to inspect the **cadmium plating** on the hub and driving centre assembly of specific Dowty Rotol variable-pitch propellers.\n- Cadmium plating is a protective metal coating used to prevent corrosion on aircraft parts. Over time, this plating can deteriorate and cause safety issues.\n\n**Who it affects:**\n- Owners and operators of aircraft fitted with **Dowty Rotol propeller models R193/4-30-4/50 and R193/4-30-4/61** — but only specific serial numbers listed in the referenced service bulletin.\n\n**Why it matters:**\n- Airworthiness Directives are legally binding safety orders. Non-compliance can ground an aircraft or result in penalties.\n- This directive addresses potential corrosion or structural integrity issues that could affect propeller performance and flight safety.\n\n**What must be done:**\n- Follow the inspection procedures detailed in **Dowty Rotol Service Bulletin No. 61-882**.\n- Compliance deadlines and methods are set out in that document (not repeated in this directive)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pr-18-hub-and-driving-centre-assembly-inspection-of-cadmium-plating","history":"/api/acts/ad-pr-18-hub-and-driving-centre-assembly-inspection-of-cadmium-plating/history","analysis":"/api/acts/ad-pr-18-hub-and-driving-centre-assembly-inspection-of-cadmium-plating/analysis","conflicts":"/api/acts/ad-pr-18-hub-and-driving-centre-assembly-inspection-of-cadmium-plating/conflicts","importantCases":"/api/acts/ad-pr-18-hub-and-driving-centre-assembly-inspection-of-cadmium-plating/important-cases","documents":"/api/acts/ad-pr-18-hub-and-driving-centre-assembly-inspection-of-cadmium-plating/documents"}}