{"id":"F2006B09024","name":"AD/DHC-1/8 - Fairey-Reed Propeller - Spinner Removal","slug":"ad-dhc-1-8-fairey-reed-propeller-spinner-removal","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52705,"registerId":"commonwealth-F2006B09024-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DHC-1/8 - Fairey-Reed Propeller - Spinner Removal","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 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  De Havilland DHC-1 (Chipmunk) Series Aeroplanes\n\n \n\nAD/DHC-1/8 Fairey-Reed Propeller - Spinner Removal 2/55\n\nApplicability: All models fitted with Fairey-Reed fixed pitch propeller type A66753/X1 and spinners type 66870 Marks 2 and 3.\n\n \n\nRequirement: 1. Remove the spinner nose and body assemblies from type A66753/X1 propellers, leaving the spinner back plate assembly installed;. or\n\n \n\n2. ANO 104.1.14.0.1.2, Issue 2.\n\n \n\nCompliance: Forthwith.\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":2594},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This airworthiness directive maintains its original narrow scope addressing a specific safety defect in specific propeller assemblies on De Havilland Chipmunk aircraft. It has not expanded beyond this original technical safety purpose."},"complexity_factors":["Single requirement with alternative compliance pathway requiring cross-reference to external technical notice (ANO)","Highly specific technical nomenclature for aircraft components (propeller types A66753/X1, spinner marks 2 and 3)","Use of archaic regulatory terminology ('Forthwith' rather than specific calendar dates)"],"plain_english_summary":"Owners/operators of De Havilland DHC‑1 Chipmunk aircraft fitted with Fairey‑Reed A66753/X1 propellers and spinner assemblies type 66870 Mark 2 or 3 must immediately remove the spinner nose/body (leaving the back plate) or comply with the alternative engineering option in ANO 104.1.14.0.1.2 Issue 2. This urgent action prevents potential in‑flight spinner failure that could damage the propeller or airframe and create a serious safety hazard."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dhc-1-8-fairey-reed-propeller-spinner-removal","history":"/api/acts/ad-dhc-1-8-fairey-reed-propeller-spinner-removal/history","analysis":"/api/acts/ad-dhc-1-8-fairey-reed-propeller-spinner-removal/analysis","conflicts":"/api/acts/ad-dhc-1-8-fairey-reed-propeller-spinner-removal/conflicts","importantCases":"/api/acts/ad-dhc-1-8-fairey-reed-propeller-spinner-removal/important-cases","documents":"/api/acts/ad-dhc-1-8-fairey-reed-propeller-spinner-removal/documents"}}