{"id":"F2015L01751","name":"CASA ADCX 018/15 - Repeal of Airworthiness Directives","slug":"casa-adcx-018-15-repeal-of-airworthiness-directives","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":93550,"registerId":"commonwealth-F2015L01751-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"CASA ADCX 018/15 - Repeal of Airworthiness Directives","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 018/15\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nInstrument number CASA ADCX 018/15\n\nI, PIETER VAN DIJK, Acting 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.jpeg)\n\nPieter van Dijk  Acting Manager  Continuing Airworthiness\n\n2 November 2015\n\nRepeal of Airworthiness Directives\n\n1 Commencement\n\n This instrument commences on 4 November 2015.\n\n2 Repeal\n\n Each Airworthiness Directive (AD) mentioned in Schedule 1 is repealed on the date specified for it in the Schedule.\n\nSchedule 1 Repeal of ADs\n\n| AD | Repeal date |\n| --- | --- |\n| AD/LYC/90 Amdt 2 | 4 November 2015 |\n| AD/B747/261 Amdt 2 | 1 December 2015 |\n\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1811},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument remains strictly limited to repealing the two specific Airworthiness Directives listed in Schedule 1, precisely matching its stated purpose without expansion."},"complexity_factors":["Very short instrument with only two operative items in a simple schedule format","No defined terms, conditional logic, or nested exceptions","Minimal cross-referencing (only to enabling subregulation 39.001(1) of the CASR 1998)","Straightforward repeal mechanism with specified dates"],"plain_english_summary":"**What this does**\n\nThis instrument cancels two specific **Airworthiness Directives** (mandatory safety instructions issued by the aviation regulator) that previously required owners of certain aircraft to perform specific maintenance or inspections.\n\n**Who it affects**\n\nAircraft operators and maintenance organisations responsible for:\n*   Aircraft with **Lycoming engines** (a type of piston engine)\n*   **Boeing 747 aircraft**\n\n**The changes**\n\nThe following safety directives are cancelled:\n*   **AD/LYC/90 Amdt 2** — cancelled on **4 November 2015** (immediately when this instrument commences)\n*   **AD/B747/261 Amdt 2** — cancelled on **1 December 2015**\n\n**Why it matters**\n\nOnce cancelled, operators are no longer legally required to comply with these specific maintenance rules. This usually happens when the safety risk has been addressed through other means, the directive is replaced by a newer version, or the affected aircraft are retired from service. This reduces paperwork and compliance costs for operators."}},"importantCases":[],"_links":{"self":"/api/acts/casa-adcx-018-15-repeal-of-airworthiness-directives","history":"/api/acts/casa-adcx-018-15-repeal-of-airworthiness-directives/history","analysis":"/api/acts/casa-adcx-018-15-repeal-of-airworthiness-directives/analysis","conflicts":"/api/acts/casa-adcx-018-15-repeal-of-airworthiness-directives/conflicts","importantCases":"/api/acts/casa-adcx-018-15-repeal-of-airworthiness-directives/important-cases","documents":"/api/acts/casa-adcx-018-15-repeal-of-airworthiness-directives/documents"}}