{"id":"F2012L00541","name":"CASA ADCX 004/12 - Revocation of Airworthiness Directives","slug":"casa-adcx-004-12-revocation-of-airworthiness-directives","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":88735,"registerId":"commonwealth-F2012L00541-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"CASA ADCX 004/12 - Revocation of Airworthiness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 354/06\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nInstrument number CASA ADCX 004/12\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 \n\n![](image.001.png)\n\nMike Higgins  Manager\n\nContinuing Airworthiness\n\n7 March 2012\n\nRevocation of Airworthiness Directives\n\n1 Commencement\n\n This instrument commences on 9 March 2012.\n\n2 Revocation\n\n Each Airworthiness Directive (AD) mentioned in Schedule 1 is revoked on the date specified for it in the Schedule.\n\nSchedule 1 Revocation of ADs\n\n| AD | Revocation date |\n| --- | --- |\n| AD/CFM56/31 | 9 March 2012 |\n\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1258},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"The instrument remains strictly limited to its stated purpose of revoking specific Airworthiness Directives, in this case a single directive relating to CFM56 engines."},"complexity_factors":["Single operative provision revoking one specific directive","No interpretation section or defined terms","No conditional logic, exceptions, or cross-references","One-page instrument with straightforward tabular schedule"],"plain_english_summary":"**What this does**\n\nThis instrument cancels (revokes) a specific aviation safety order — Airworthiness Directive AD/CFM56/31 — effective 9 March 2012.\n\n**What is an Airworthiness Directive?**\n\nThese are mandatory safety instructions issued by the Civil Aviation Safety Authority (CASA) to fix unsafe conditions in aircraft, engines, or parts. Compliance is legally required.\n\n**Who it affects**\n\nAircraft operators, maintenance organisations, and engineers who operate or service aircraft with CFM56 engines (commonly used in Boeing 737 and Airbus A320 family aircraft).\n\n**Why it matters**\n\nThis removes a specific maintenance or inspection requirement. This typically happens when:\n- The safety issue has been permanently fixed through design changes\n- The directive has been replaced by a newer requirement\n- CASA determines the safety risk no longer justifies the compliance burden\n\nOperators no longer need to follow the specific instructions in AD/CFM56/31 from 9 March 2012 onwards."}},"importantCases":[],"_links":{"self":"/api/acts/casa-adcx-004-12-revocation-of-airworthiness-directives","history":"/api/acts/casa-adcx-004-12-revocation-of-airworthiness-directives/history","analysis":"/api/acts/casa-adcx-004-12-revocation-of-airworthiness-directives/analysis","conflicts":"/api/acts/casa-adcx-004-12-revocation-of-airworthiness-directives/conflicts","importantCases":"/api/acts/casa-adcx-004-12-revocation-of-airworthiness-directives/important-cases","documents":"/api/acts/casa-adcx-004-12-revocation-of-airworthiness-directives/documents"}}