{"id":"F2010L02760","name":"CASA ADCX 027/10 - Revocation of Airworthiness Directives","slug":"casa-adcx-027-10-revocation-of-airworthiness-directives","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":84716,"registerId":"commonwealth-F2010L02760-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"CASA ADCX 027/10 - Revocation of Airworthiness Directives","content":"Instrument number CASA ADCX 027/10\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  \nManager\n\nContinuing Airworthiness\n\n15 October 2010\n\nRevocation of Airworthiness Directives\n\n1 Commencement\n\nThis instrument commences on 22 October 2010.\n\n2 Revocation\n\nEach 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/B747/132  | 12 November 2010 |\n| AD/CT58/2    | 1 November 2010  |\n| AD/CT58/3    | 1 November 2010  |\n| AD/CT58/4    | 1 November 2010  |\n| AD/CT58/6    | 1 November 2010  |\n| AD/CT58/7    | 1 November 2010  |\n| AD/CT58/8    | 1 November 2010  |\n| AD/CT58/9    | 1 November 2010  |\n| AD/CT58/10   | 1 November 2010  |\n| AD/A320/184  | 28 October 2010  |\n| AD/ARRIEL/35 | 28 October 2010  |","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1170},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"The instrument precisely targets the revocation of specific listed Airworthiness Directives without expanding beyond this stated purpose."},"complexity_factors":["Single operational purpose with no conditional provisions","No defined terms or interpretive sections","Simple schedule format with only two data points per item (AD number and date)","No cross-references to other legislation beyond the enabling regulation"],"plain_english_summary":"This instrument is a housekeeping measure by the Civil Aviation Safety Authority (CASA) that cancels 11 outdated safety directives for specific aircraft types.\n\n**What it does:**  \nIt formally revokes (cancels) old Airworthiness Directives (ADs) — which are mandatory safety rules requiring specific maintenance or modifications — for certain Boeing 747, Airbus A320, and helicopter engine models.\n\n**Who it affects:**  \nAirlines and aircraft operators who maintain these specific aircraft models, including those with:\n- **Bell helicopter engines** (CT58 series) — 8 directives revoked\n- **Boeing 747** (AD/B747/132)\n- **Airbus A320** (AD/A320/184)  \n- **Turbomeca Arriel engines** (AD/ARRIEL/35)\n\n**Why it matters:**  \nIt removes obsolete regulatory burdens. Once revoked, operators no longer need to comply with these specific maintenance requirements, typically because newer safety measures have replaced them or the original safety issue has been resolved through fleet modifications. The revocations take effect on various dates between 28 October and 12 November 2010."}},"importantCases":[],"_links":{"self":"/api/acts/casa-adcx-027-10-revocation-of-airworthiness-directives","history":"/api/acts/casa-adcx-027-10-revocation-of-airworthiness-directives/history","analysis":"/api/acts/casa-adcx-027-10-revocation-of-airworthiness-directives/analysis","conflicts":"/api/acts/casa-adcx-027-10-revocation-of-airworthiness-directives/conflicts","importantCases":"/api/acts/casa-adcx-027-10-revocation-of-airworthiness-directives/important-cases","documents":"/api/acts/casa-adcx-027-10-revocation-of-airworthiness-directives/documents"}}