{"id":"F2006B09275","name":"AD/DHE/25 - Minimum Modification Standard at Major Reconditioning","slug":"ad-dhe-25-minimum-modification-standard-at-major-reconditioning","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":53308,"registerId":"commonwealth-F2006B09275-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DHE/25 - Minimum Modification Standard at Major Reconditioning","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 - 106 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  De Havilland Piston Engines\n\n \n\n# AD/DHE/25 Minimum Modification Standard at Major Reconditioning\n\nApplicability: Gipsy Queen 70 MK. 2.\n\n# 6/72\n\n \n\nRequirement: Incorporate modifications marked with an asterisk in Rolls Royce Gipsy Technical News Sheet TNS GQ.70 No. 15 dated 26 February 1968, Appendix \"A\".\n\n \n\nCompliance: Before installation in an aircraft following next reconditioning completed after 30 June 1972.\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":991},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"The directive retains its original narrow scope, applying exclusively to the Gipsy Queen 70 MK. 2 engine and mandating specific modifications only at the point of major reconditioning."},"complexity_factors":["Single, clearly defined applicability (one specific engine model)","Single external technical reference (Rolls-Royce Technical News Sheet)","No defined terms section","Single compliance trigger event (post-reconditioning installation)","No conditional logic, exceptions, or nested provisions"],"plain_english_summary":"This AD requires owners/operators of De Havilland Gipsy Queen 70 MK.2 piston engines to fit the safety modifications identified (asterisked) in Rolls‑Royce Technical News Sheet TNS GQ.70 No.15, Appendix A, when the engine undergoes its next major reconditioning completed after 30 June 1972.  \n\nIt affects operators, maintainers and owners of vintage aircraft using this engine and matters because the modifications reduce the risk of mechanical failure after overhaul."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dhe-25-minimum-modification-standard-at-major-reconditioning","history":"/api/acts/ad-dhe-25-minimum-modification-standard-at-major-reconditioning/history","analysis":"/api/acts/ad-dhe-25-minimum-modification-standard-at-major-reconditioning/analysis","conflicts":"/api/acts/ad-dhe-25-minimum-modification-standard-at-major-reconditioning/conflicts","importantCases":"/api/acts/ad-dhe-25-minimum-modification-standard-at-major-reconditioning/important-cases","documents":"/api/acts/ad-dhe-25-minimum-modification-standard-at-major-reconditioning/documents"}}