{"id":"F2006B09280","name":"AD/DHE/5 - Sun Gear Distance Piece - Modification","slug":"ad-dhe-5-sun-gear-distance-piece-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":53325,"registerId":"commonwealth-F2006B09280-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DHE/5 - Sun Gear Distance Piece - 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 - 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/5 Sun Gear Distance Piece - Modification NK\n\nApplicability: Gipsy Queen 70 series modified to Mod. G1213. Document:  1. DH Mod. G1329; or\n\n2. ANO 106.1.7.6.5.6.\n\n \n\nCompliance: Before installation in an aircraft.\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":1852},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow technical scope targeting a specific engine component (sun gear distance piece) for the Gipsy Queen 70 series. There is no evidence of expansion into broader operational requirements or additional engine models beyond the original safety mandate."},"complexity_factors":["Extremely short document with no sections or subsections","Single, clear applicability criterion (Gipsy Queen 70 series with Mod. G1213)","Simple binary choice for compliance (two alternative documents referenced)","No defined terms, interpretation clauses, or exceptions","Straightforward temporal trigger (compliance required before installation)"],"plain_english_summary":"**What this does:** This is a mandatory safety directive requiring a specific mechanical modification to certain aircraft engines before they can be flown. It targets the \"sun gear distance piece\" — an internal component in the engine's gearbox — in De Havilland Gipsy Queen 70 series engines (used in some older British aircraft) that have already undergone Modification G1213.\n\n**Who it affects:** Aircraft owners, operators, and maintenance engineers working on planes fitted with these specific engines.\n\n**What you must do:** Before installing one of these engines into an aircraft, you must ensure the sun gear distance piece has been modified according to **either**:\n- De Havilland Modification G1329, **or**\n- British Airworthiness Notice 106.1.7.6.5.6\n\n**Why it matters:** This ensures a critical engine component meets updated safety standards to prevent mechanical failures that could affect flight safety."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dhe-5-sun-gear-distance-piece-modification","history":"/api/acts/ad-dhe-5-sun-gear-distance-piece-modification/history","analysis":"/api/acts/ad-dhe-5-sun-gear-distance-piece-modification/analysis","conflicts":"/api/acts/ad-dhe-5-sun-gear-distance-piece-modification/conflicts","importantCases":"/api/acts/ad-dhe-5-sun-gear-distance-piece-modification/important-cases","documents":"/api/acts/ad-dhe-5-sun-gear-distance-piece-modification/documents"}}