{"id":"F2006B09272","name":"AD/DHE/22 - Minimum Modification Standard at Major Reconditioning","slug":"ad-dhe-22-minimum-modification-standard-at-major-reconditioning","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":53300,"registerId":"commonwealth-F2006B09272-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DHE/22 - Minimum Modification Standard at Major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\nAD/DHE/22 Minimum Modification Standard at Major Reconditioning\n\n\n6/72\n\n \n\nApplicability: Gipsy Queen 11.\n\n \n\nDocument: R.Royce Gipsy TNS G No. 15 dated 18 February 1970 and Appendix 3 dated 27 June 1963.\n\n \n\nCompliance: Before installation 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\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1807},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This is a narrow, technical directive with a specific mechanical safety purpose. It has not expanded beyond its original intent of ensuring Gipsy Queen 11 engines meet modification standards during overhaul."},"complexity_factors":["Limited to single engine type (Gipsy Queen 11)","Single compliance trigger (installation after reconditioning post-30 June 1972)","No defined terms, exceptions, or conditional logic","Direct reference to external technical standards without complex incorporation machinery"],"plain_english_summary":"**What this does:** This rule requires specific safety upgrades to be installed on **Gipsy Queen 11 aircraft engines** whenever they undergo major overhauls (reconditioning) after 30 June 1972.\n\n**Who it affects:** Aircraft maintenance organisations and owners operating planes with these specific engines (commonly used in older De Havilland aircraft).\n\n**Key requirement:** Before putting a reconditioned engine back into service, mechanics must incorporate the modifications listed in two specific Rolls-Royce technical documents (TNS G No. 15 and Appendix 3). This ensures engines meet updated safety standards after significant maintenance work."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dhe-22-minimum-modification-standard-at-major-reconditioning","history":"/api/acts/ad-dhe-22-minimum-modification-standard-at-major-reconditioning/history","analysis":"/api/acts/ad-dhe-22-minimum-modification-standard-at-major-reconditioning/analysis","conflicts":"/api/acts/ad-dhe-22-minimum-modification-standard-at-major-reconditioning/conflicts","importantCases":"/api/acts/ad-dhe-22-minimum-modification-standard-at-major-reconditioning/important-cases","documents":"/api/acts/ad-dhe-22-minimum-modification-standard-at-major-reconditioning/documents"}}