{"id":"F2006B10364","name":"AD/HILLER 12/39 - Consolidation of Early Airworthiness Directives","slug":"ad-hiller-12-39-consolidation-of-early-airworthiness-directives","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115983,"registerId":"commonwealth-F2006B10364-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HILLER 12/39 - Consolidation of Early Airworthiness Directives","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)  Hiller UH-12 Series Helicopters\n\n \n\n# AD/HILLER 12/39  Consolidation of Early Airworthiness Directives\n\nApplicability: All Hiller UH-12 series helicopters. Requirement:  As applicable comply with the following;\n\n# 3/87\n\nHiller SIL: 3015A, 3039, 3052, 3054. Hiller SB: 2026, 87 and 2004, 51-2, 32-2, 21-\n\n2. Hiller SL: 21-4, 30-2. Soloy Conversions Ltd SB: 14-560. Compliance: Prior to issue of Certificate of Airworthiness.\n\nBackground: Early modifications and one time inspections of older model UH-12 Helicopters have been consolidated above.\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":1752},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive consolidates existing early airworthiness directives into a single instrument for administrative clarity. It does not expand the regulatory scope beyond the original safety requirements for Hiller UH-12 helicopters, nor does it introduce new substantive obligations beyond those already mandated in the predecessor directives."},"complexity_factors":["Short, single-purpose directive with minimal conditional language","Relies entirely on external technical references (Service Bulletins and Information Letters) without reproducing their content","Specific to one aircraft series (Hiller UH-12) with no exceptions or nested provisions"],"plain_english_summary":"This **Airworthiness Directive** (a legally binding safety order issued by the aviation regulator) bundles multiple old safety requirements into one rule for **Hiller UH-12 series helicopters** (a specific type of aircraft). \n\n**What it requires:**\nBefore a Hiller UH-12 helicopter can be issued with a **Certificate of Airworthiness** (the official government permit that allows an aircraft to fly legally), the owner must complete specific modifications and inspections outlined in manufacturer technical notices.\n\n**Which documents:**\nThe rule references various Service Bulletins (SB) and Service Information Letters (SIL) from Hiller and Soloy Conversions Ltd. These contain the detailed technical instructions for the required safety work.\n\n**Who it affects:**\nAnyone who owns, operates, or maintains a Hiller UH-12 series helicopter in Australia.\n\n**Why it matters:**\nIt ensures older helicopters are brought up to current safety standards before they fly, preventing accidents caused by outdated components or missed structural inspections."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hiller-12-39-consolidation-of-early-airworthiness-directives","history":"/api/acts/ad-hiller-12-39-consolidation-of-early-airworthiness-directives/history","analysis":"/api/acts/ad-hiller-12-39-consolidation-of-early-airworthiness-directives/analysis","conflicts":"/api/acts/ad-hiller-12-39-consolidation-of-early-airworthiness-directives/conflicts","importantCases":"/api/acts/ad-hiller-12-39-consolidation-of-early-airworthiness-directives/important-cases","documents":"/api/acts/ad-hiller-12-39-consolidation-of-early-airworthiness-directives/documents"}}