{"id":"F2015L01408","name":"CASA ADCX 013/15 - Repeal of Airworthiness Directive","slug":"casa-adcx-013-15-repeal-of-airworthiness-directive","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":154525,"registerId":"commonwealth-F2015L01408-current","compilationNumber":null,"startDate":"2026-04-04","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"CASA ADCX 013/15 - Repeal of Airworthiness Directive","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-description: Revocation of directions\nmeta-generator: Aspose.Words for .NET 20.2\ntitle: CASA ADCX 004/13\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nInstrument number CASA ADCX 013/15\n\nI, MICHAEL JAMES HIGGINS, Manager, Continuing Airworthiness, a delegate of CASA, make this instrument under subregulation 39.001 (1) of the Civil Aviation Safety Regulations 1998.\n\n![](image.001.png)\n\nMike Higgins  Manager  Continuing Airworthiness\n\n4 September 2015\n\nRepeal of Airworthiness Directive\n\n1 Commencement\n\n This instrument commences on 7 September 2015.\n\n2 Repeal\n\n The Airworthiness Directive (AD) mentioned in Schedule 1 is repealed on the date specified for it in the Schedule.\n\nSchedule 1 Repeal of AD\n\n| AD | Repeal date |\n| --- | --- |\n| AD/PT6A/28 Amdt 1 | 7 September 2015 |\n\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1784},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"The instrument performs exactly the limited function stated in its title and preamble—repealing a single specified Airworthiness Directive on a fixed date without expansion to other regulatory matters."},"complexity_factors":["Extremely short length (only 2 operative sections plus schedule)","Zero defined terms or interpretation provisions","Single, unconditional repeal mechanism with no exceptions","No cross-references to other legislation beyond the enabling regulation"],"plain_english_summary":"This instrument **cancels a specific aircraft safety directive** effective 7 September 2015.\n\n**What it does:**\n*   Repeals Airworthiness Directive **AD/PT6A/28 Amdt 1** (which applied to Pratt & Whitney PT6A aircraft engines—commonly used in turboprop planes)\n*   Removes the legal requirement for aircraft operators and maintenance providers to comply with the specific safety instructions, inspections, or modifications contained in that directive\n\n**Who it affects:**\n*   Owners and operators of aircraft fitted with Pratt & Whitney PT6A engines\n*   Licensed aircraft maintenance engineers and approved maintenance organisations responsible for these engine types\n\n**Why it matters:**\nAirworthiness Directives are mandatory compliance orders issued when safety issues are identified in aircraft or components. Removing this directive eliminates the associated regulatory burden for affected operators, typically because the safety issue has been resolved through other means, the directive has been superseded by a newer requirement, or the original safety concern no longer exists."}},"importantCases":[],"_links":{"self":"/api/acts/casa-adcx-013-15-repeal-of-airworthiness-directive","history":"/api/acts/casa-adcx-013-15-repeal-of-airworthiness-directive/history","analysis":"/api/acts/casa-adcx-013-15-repeal-of-airworthiness-directive/analysis","conflicts":"/api/acts/casa-adcx-013-15-repeal-of-airworthiness-directive/conflicts","importantCases":"/api/acts/casa-adcx-013-15-repeal-of-airworthiness-directive/important-cases","documents":"/api/acts/casa-adcx-013-15-repeal-of-airworthiness-directive/documents"}}