{"id":"F2006B09281","name":"AD/DHE/6 - Connecting Rod Securing Nuts - Modification","slug":"ad-dhe-6-connecting-rod-securing-nuts-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":53327,"registerId":"commonwealth-F2006B09281-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DHE/6 - Connecting Rod Securing Nuts - 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/6 Connecting Rod Securing Nuts - Modification NK\n\nApplicability: Gipsy Queen Series 70.\n\n \n\nDocument: 1. DH Mods. G1432 Part 1 or G1708; or 2. ANO 106.1.7.6.5.9.\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":1321},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument remains tightly focused on its original purpose: mandating a specific hardware modification for connecting rod nuts. There is no evidence of scope expansion into unrelated maintenance requirements or additional engine models."},"complexity_factors":["Very short text with a single, clear compliance obligation","Narrow applicability limited to one specific engine series (Gipsy Queen 70)","Only three external technical references (no legislative cross-references)","No defined terms, exceptions, or conditional provisions","Straightforward temporal trigger (before installation)"],"plain_english_summary":"**What this is:** A mandatory safety direction (an Airworthiness Directive) issued by the Civil Aviation Safety Authority (CASA) that applies to specific vintage aircraft engines.\n\n**What it requires:** Before a De Havilland Gipsy Queen Series 70 engine can be installed in any aircraft, the nuts that hold the connecting rods (the metal links connecting pistons to the crankshaft) must be modified according to specific technical instructions.\n\n**Who it affects:** Aircraft mechanics, maintenance organisations, and owners of aircraft fitted with these engines (commonly used in older British aircraft like the Dove or Devon).\n\n**Why it matters:** The modification prevents catastrophic engine failure caused by connecting rod nuts loosening during flight. The directive points to three technical documents (DH Modification G1432 Part 1, G1708, or Airworthiness Notice 106.1.7.6.5.9) that detail exactly how the hardware must be altered or replaced."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dhe-6-connecting-rod-securing-nuts-modification","history":"/api/acts/ad-dhe-6-connecting-rod-securing-nuts-modification/history","analysis":"/api/acts/ad-dhe-6-connecting-rod-securing-nuts-modification/analysis","conflicts":"/api/acts/ad-dhe-6-connecting-rod-securing-nuts-modification/conflicts","importantCases":"/api/acts/ad-dhe-6-connecting-rod-securing-nuts-modification/important-cases","documents":"/api/acts/ad-dhe-6-connecting-rod-securing-nuts-modification/documents"}}