{"id":"F2006B06315","name":"AD/PR/17 - Hub Driving Centre Flange - Inspection","slug":"ad-pr-17-hub-driving-centre-flange-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47446,"registerId":"commonwealth-F2006B06315-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PR/17 - Hub Driving Centre Flange - Inspection","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/17 Hub Driving Centre Flange - Inspection NK\n\nApplicability: All model R186/4-30-4/16 installed on Argosy 100 aircraft and not incorporating Mod. No. (c) VP 2381.\n\n \n\nDocument: Dowty Rotol SB No. 61-477, Rev. 1. 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\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2046},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This airworthiness directive maintains its original tightly-circumscribed scope. It addresses a specific safety defect in a specific propeller component as identified by the manufacturer, without expansion into broader operational or maintenance requirements."},"complexity_factors":["Single operational requirement (visual or dimensional inspection) with no nested exceptions","Complete delegation of technical procedure to external document (Service Bulletin 61-477 Rev 1)","Narrow applicability limited to one legacy aircraft type (Argosy 100) and single propeller model","Simple binary exclusion criterion based on modification status (Mod. VP 2381)"],"plain_english_summary":"This directive mandates a safety inspection for a specific mechanical part on certain older aircraft propellers.\n\n**What it requires**\nOwners must inspect the **hub driving centre flange** (the central metal component that connects the propeller to the engine and transmits power) on specific Dowty Rotol propellers.\n\n**Who must comply**\nThis applies only to:\n- **Argosy 100 aircraft** fitted with Dowty Rotol model **R186/4-30-4/16** propellers\n- Only if the propeller has **not** already been modified under Service Modification No. VP 2381\n\n**How to comply**\nFollow the inspection procedures detailed in **Dowty Rotol Service Bulletin No. 61-477, Revision 1**. The bulletin contains the technical steps, tools required, and acceptance criteria.\n\n**Why this matters**\nThe inspection detects potential cracks or structural fatigue in the flange that could lead to propeller separation or catastrophic failure during flight. This is a mandatory safety requirement under Part 39 of the Civil Aviation Regulations."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pr-17-hub-driving-centre-flange-inspection","history":"/api/acts/ad-pr-17-hub-driving-centre-flange-inspection/history","analysis":"/api/acts/ad-pr-17-hub-driving-centre-flange-inspection/analysis","conflicts":"/api/acts/ad-pr-17-hub-driving-centre-flange-inspection/conflicts","importantCases":"/api/acts/ad-pr-17-hub-driving-centre-flange-inspection/important-cases","documents":"/api/acts/ad-pr-17-hub-driving-centre-flange-inspection/documents"}}