{"id":"F2009L03934","name":"AD/PR/17 - Hub Driving Centre Flange - Inspection - CANCELLED","slug":"ad-pr-17-hub-driving-centre-flange-inspection-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":81339,"registerId":"commonwealth-F2009L03934-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Propellers - Variable Pitch - Dowty Roto","sectionType":"division","heading":"Propellers - Variable Pitch - Dowty Rotol","content":"### Propellers - Variable Pitch - Dowty Rotol\n\n| AD/PR/17 | Hub Driving Centre Flange - Inspection | 12/2009 |\n| -------- | -------------------------------------- | ------- |\n\n| Requirement: | CANCELLED.                                                                                                                          |\n| ------------ | ----------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 19 November 2009.                                                                                           |\n| Background:  | This unique Australian AD applied to propellers installed on Armstrong-Whitworth Argosy 100 aircraft. The AD is no longer required. |\n\n![](image.001.png)\n\nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n30 September 2009","sortOrder":0},{"sectionNumber":"AD/PR/17","sectionType":"part","heading":"AD/PR/17","content":"## AD/PR/17","sortOrder":1},{"sectionNumber":"Hub Driving Centre Flange - Inspection","sectionType":"part","heading":"Hub Driving Centre Flange - Inspection","content":"## Hub Driving Centre Flange - Inspection","sortOrder":2},{"sectionNumber":"12/2009","sectionType":"part","heading":"12/2009","content":"## 12/2009","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2831},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument terminates the legal obligations imposed by the original Airworthiness Directive rather than expanding them. The scope shifts from active regulation to cancellation, representing a removal of regulatory burden rather than scope creep."},"complexity_factors":["Single operative provision consisting of one sentence","No defined terms or interpretation section","No cross-references to other legislation","No conditional logic or exceptions","Purely administrative revocation of prior instrument"],"plain_english_summary":"This document **cancels a previous aviation safety rule** (called an *Airworthiness Directive*, or AD) that required mechanical inspections on specific aircraft propellers.\n\n**What it affects**\n*   **Aircraft:** Armstrong-Whitworth Argosy 100 (a historic cargo aircraft)\n*   **Component:** The \"hub driving centre flange\" on Dowty Rotol variable-pitch propellers (the central part connecting the propeller blades to the engine)\n\n**What it does**\nPreviously, owners and operators had to inspect this flange for defects. This cancellation **removes that requirement** effective **19 November 2009**. The Civil Aviation Safety Authority (CASA) determined the inspection was no longer necessary for airworthiness.\n\n**Why it matters**\nFor the few operators maintaining these specific vintage aircraft, this eliminates a mandatory maintenance task, reducing compliance costs and paperwork."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pr-17-hub-driving-centre-flange-inspection-cancelled","history":"/api/acts/ad-pr-17-hub-driving-centre-flange-inspection-cancelled/history","analysis":"/api/acts/ad-pr-17-hub-driving-centre-flange-inspection-cancelled/analysis","conflicts":"/api/acts/ad-pr-17-hub-driving-centre-flange-inspection-cancelled/conflicts","importantCases":"/api/acts/ad-pr-17-hub-driving-centre-flange-inspection-cancelled/important-cases","documents":"/api/acts/ad-pr-17-hub-driving-centre-flange-inspection-cancelled/documents"}}