{"id":"F2006B09003","name":"AD/DHC-1/2 - Engine Mount Pick-Up Points - Modification","slug":"ad-dhc-1-2-engine-mount-pick-up-points-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52653,"registerId":"commonwealth-F2006B09003-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DHC-1/2 - Engine Mount Pick-Up Points - Modification","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-1/2 Engine Mount Pick-Up Points - Modification 9/52\n\nApplicability: All English production models. Document: 1. DH TNS CT(C1) No. 63; or\n\n2. ANO 105.1.14.15.5.2.\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\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1636},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive maintains a narrow, technical scope focused solely on a specific structural modification for a single aircraft type. There is no evidence of scope expansion beyond the original safety imperative to address engine mount integrity in English-production Chipmunk aircraft."},"complexity_factors":["Extremely brief text (under 50 words of substantive content)","Single unconditional compliance requirement with no exceptions or conditional logic","No defined terms section (relies on external aviation technical standards)","Heavy reliance on external technical documents not reproduced here (DH TNS CT(C1) No. 63)","Uses aviation industry shorthand ('pick-up points','forthwith','applicability')"],"plain_english_summary":"This mandatory Airworthiness Directive requires owners/operators of English-built De Havilland DHC-1 Chipmunk aircraft to immediately modify the engine mount pick-up points before further flight.  \n\nCompliance must follow the engineering instructions in De Havilland Technical Notes Sheet CT(C1) No. 63 or Airworthiness Notice No. 105.1.14.15.5.2. The change prevents possible engine separation and catastrophic failure."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dhc-1-2-engine-mount-pick-up-points-modification","history":"/api/acts/ad-dhc-1-2-engine-mount-pick-up-points-modification/history","analysis":"/api/acts/ad-dhc-1-2-engine-mount-pick-up-points-modification/analysis","conflicts":"/api/acts/ad-dhc-1-2-engine-mount-pick-up-points-modification/conflicts","importantCases":"/api/acts/ad-dhc-1-2-engine-mount-pick-up-points-modification/important-cases","documents":"/api/acts/ad-dhc-1-2-engine-mount-pick-up-points-modification/documents"}}