{"id":"F2006B04320","name":"AD/BELL 204/12 Amdt 1 - Superseded by DCA/BELL 204/6 Amdt 5","slug":"ad-bell-204-12-amdt-1-superseded-by-dca-bell-204-6-amdt-5","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44135,"registerId":"commonwealth-F2006B04320-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BELL 204/12 Amdt 1 - Superseded by DCA/BELL 204/6 Amdt 5","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: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)  Bell Helicopter Textron 204 Series Helicopters\n\n \n\nAD/BELL 204/12\n\nAmdt 1\n\n\nSuperseded by DCA/BELL 204/6 Amdt 5 NK\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\n \n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"The supplied entry was superseded by a later instrument: \"Superseded by DCA/BELL 204/6 Amdt 5 NK.\" This indicates the scope or the administrative status of AD/BELL 204/12 Amdt 1 changed after issuance. The supplied text does not contain the substantive requirements of either the original AD or the superseding instrument, so the precise nature of the scope change (which actions, serial numbers, compliance times or technical requirements were altered) cannot be determined from the excerpt alone. To assess the substantive scope change, consult the full texts of AD/BELL 204/12 Amdt 1 and DCA/BELL 204/6 Amdt 5 NK."},"complexity_factors":["Document fragment contains only metadata (title, amendment and supersession) and no operative provisions, forcing cross-reference to other instruments.","Regulatory cross-references and amendment history require locating the superseding AD (DCA/BELL 204/6 Amdt 5 NK) to understand current obligations.","Technical subject matter (airworthiness for Bell 204 series helicopters) implies underlying aviation-technical complexity not present in the excerpt but likely relevant in the full AD.","Administrative numbering (multiple AD series, amendments, and supersessions) increases traceability complexity for affected operators."],"plain_english_summary":"### What this entry is\n\n- This document is an entry in the Civil Aviation Safety Authority's Schedule of Airworthiness Directives under the Commonwealth Civil Aviation Regulations 1998 (Part 39 - 105). The entry is titled \"AD/BELL 204/12 Amdt 1\" and is identified as applying to \"Bell Helicopter Textron 204 Series Helicopters.\" (see header: COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY; SCHEDULE OF AIRWORTHINESS DIRECTIVES; AD/BELL 204/12 Amdt 1; Bell Helicopter Textron 204 Series Helicopters).\n\n- The supplied text contains no operative requirements, compliance dates, corrective actions, affected serial numbers, or other substantive paragraphs. The only additional information shown in the supplied snippet is that this entry was later superseded: \"Superseded by DCA/BELL 204/6 Amdt 5 NK.\" (see footnote: Superseded by DCA/BELL 204/6 Amdt 5 NK).\n\n### Who this affects\n\n- As titled, the entry is directed at Bell Helicopter Textron 204 series helicopters. Practically, the class of parties most likely affected by such an entry are owners, operators and maintainers of those helicopters within the regulator's jurisdiction, because airworthiness directives address the continued airworthiness of specific aircraft types (source: title and regulatory heading above).\n\n### Why it matters (mechanics and institutional role)\n\n- An Airworthiness Directive (AD) listed in CASA's Schedule is a regulatory instrument recorded under Part 39 of the Civil Aviation Regulations 1998 (per the document heading). Such entries are the regulator's way of recording and communicating mandatory or mandatory-style requirements for particular aircraft types. The supplied text does not include the particular requirements for this AD, so the document as supplied does not allow identification of the specific technical fixes or actions required.\n\n### Where the costs, decisions and compliance responsibilities lie (source-grounded statements)\n\n- Who decides: The Civil Aviation Safety Authority is the issuing authority identified by the document heading (COMMONWEALTH OF AUSTRALIA ... CIVIL AVIATION SAFETY AUTHORITY). That agency issues, amends and can supersede ADs (the presence of an amendment number and the note that it was superseded show administrative action by the regulator).\n\n- Who pays: The supplied entry does not set out cost lines. By virtue of this being an AD for a specific helicopter type, any costs of complying with the AD (if the AD contains inspections, modifications or part replacements) would fall on the owners/operators/maintainers of the affected aircraft — the supplied text identifies those aircraft only by type (Bell 204 series) but gives no cost figures or mandatory actions.\n\n- Compliance burden and behaviour change: The supplied text gives no operative compliance items, so specific burdens, timing, or required changes to maintenance or operation cannot be stated from this excerpt. The administrative metadata (AD number, amendment, supersession) indicates that operators need to track which ADs/amendments apply because a later instrument (DCA/BELL 204/6 Amdt 5 NK) supersedes this one.\n\n- Discretion and implementation risk: The document shows administrative discretion in the form of amendments and later supersession (AD/BELL 204/12 Amdt 1 was superseded by DCA/BELL 204/6 Amdt 5 NK). The supplied text does not show any discretionary exemptions, alternative means of compliance, or enforcement mechanisms.\n\n### Practical implication of the supplied excerpt\n\n- The text supplied functions primarily as an identifier and record entry: it establishes that an AD titled AD/BELL 204/12 Amdt 1 existed for Bell 204 series helicopters and that it has since been superseded. It does not allow determination of the AD's substantive content, the specific regulatory requirements it imposed, or the magnitude of costs or operational changes. To determine concrete obligations, costs and operational effects, the superseding instrument (DCA/BELL 204/6 Amdt 5 NK) and the original full text of AD/BELL 204/12 Amdt 1 must be consulted (see the supersession note in the supplied text)."},"kimi_summary":{"content_quality":"rejected","complexity_score":1,"rejection_reason":"This is a navigation/header page or stub containing only metadata (document title, amendment number, and supersession notice). It contains no substantive legislative text, operative provisions, or regulatory content to analyse. The actual Airworthiness Directive content is not present in this fragment.","scope_assessment":{"changed":false,"description":"Not applicable — this is a document header/metadata page with no substantive content to assess for scope changes."},"complexity_factors":["Document is essentially a header/metadata page only — no substantive regulatory text present","Contains only document identification information (AD number, amendment number, supersession notice)","No defined terms, operative provisions, or conditional logic visible","Extremely short (effectively a title page)","No cross-references to other legislation or regulations"],"plain_english_summary":"This document is an **Airworthiness Directive (AD)** for Bell 204 series helicopters. Airworthiness Directives are mandatory safety notices issued by the Civil Aviation Safety Authority (CASA) that require aircraft owners and operators to perform specific inspections, repairs, or modifications to address unsafe conditions.\n\n**What this document does:**\n- This is **Amendment 1** to AD/BELL 204/12, which updates a previous safety directive for Bell Helicopter Textron 204 series helicopters\n- The document has been **superseded** (replaced) by a newer directive: DCA/BELL 204/6 Amdt 5\n\n**Who it affects:**\n- Owners and operators of Bell 204 series helicopters in Australia\n- Maintenance organisations servicing these aircraft\n\n**Why it matters:**\n- Airworthiness Directives are **legally binding** — compliance is mandatory\n- This particular document is now obsolete and has been replaced by a newer version, meaning operators should follow the superseding directive instead\n- The numbering suggests this relates to a specific safety issue (the \"/12\" suffix typically indicates the 12th AD issued for this aircraft type)\n\n**Key takeaway:** This is a historical document showing the evolution of safety requirements. Anyone operating Bell 204 helicopters should check the current status and ensure they are complying with the latest directive (DCA/BELL 204/6 Amdt 5), not this superseded version."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-204-12-amdt-1-superseded-by-dca-bell-204-6-amdt-5","history":"/api/acts/ad-bell-204-12-amdt-1-superseded-by-dca-bell-204-6-amdt-5/history","analysis":"/api/acts/ad-bell-204-12-amdt-1-superseded-by-dca-bell-204-6-amdt-5/analysis","conflicts":"/api/acts/ad-bell-204-12-amdt-1-superseded-by-dca-bell-204-6-amdt-5/conflicts","importantCases":"/api/acts/ad-bell-204-12-amdt-1-superseded-by-dca-bell-204-6-amdt-5/important-cases","documents":"/api/acts/ad-bell-204-12-amdt-1-superseded-by-dca-bell-204-6-amdt-5/documents"}}