{"id":"F2006B10129","name":"AD/G73/18 - Superseded by AD/G73/21","slug":"ad-g73-18-superseded-by-ad-g73-21","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55687,"registerId":"commonwealth-F2006B10129-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/G73/18 - Superseded by AD/G73/21","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET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OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Frakes (Grumman) G73 Series Aeroplanes\n\n \n\nAD/G73/18 Superseded by AD/G73/21 NK\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n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":{"kimi_summary":{"content_quality":"rejected","complexity_score":1,"rejection_reason":"This is a navigation stub/placeholder page indicating that AD/G73/18 has been superseded by AD/G73/21. It contains no substantive legislative content, operative provisions, or regulatory requirements. The actual content of the airworthiness directive is not present in this fragment.","scope_assessment":{"changed":false,"description":"This is a navigation stub indicating document replacement. It has no scope of its own to assess."},"complexity_factors":["Document is a stub/placeholder with no substantive legislative content","Contains only metadata (document title, supersession notice, and aircraft type)","No operative provisions, definitions, or conditional logic","No cross-references to other legislation (only internal reference to replacement AD)","Length: effectively zero substantive text"],"plain_english_summary":"This document is a **navigation marker** indicating that Airworthiness Directive AD/G73/18 has been replaced by a newer version, AD/G73/21.\n\n**What it is:**\n- An **Airworthiness Directive (AD)** is a mandatory safety notice issued by the Civil Aviation Safety Authority (CASA) requiring aircraft owners or operators to perform specific inspections, repairs, or modifications to address unsafe conditions.\n\n**What this specific entry tells us:**\n- The old directive **AD/G73/18** (which applied to **Frakes/Grumman G73 series aircraft**) is no longer in force.\n- It has been **superseded** (replaced) by **AD/G73/21**.\n- The \"NK\" likely indicates the classification or source of the directive.\n\n**Who it affects:**\n- Owners and operators of Grumman G73 series aircraft (also known as Grumman Mallard amphibious aircraft).\n- Maintenance engineers and aviation safety inspectors.\n\n**Why it matters:**\n- Aircraft operators must comply with the **current** version of the directive (AD/G73/21), not this outdated one. Using superseded safety directives could mean missing critical safety updates.\n- This marker exists to prevent confusion and ensure aviation professionals locate the correct, legally binding safety requirements."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The source text records that AD/G73/18 has been superseded by AD/G73/21 but does not include the text of either directive. The entry therefore indicates an administrative replacement but provides no evidence in this document that the substantive scope of obligations changed. To determine whether scope changed, the text of AD/G73/21 must be consulted."},"complexity_factors":["The document is a short schedule entry with no substantive directive text, reducing textual complexity.","Regulatory context (Civil Aviation Regulations 1998 Part 39–105) introduces legal complexity for implementation despite brevity of the entry.","Supersession creates a cross-reference dependency: relevant obligations now reside in AD/G73/21 rather than in this entry.","Operational impact cannot be assessed from this entry alone, requiring practitioners to locate additional material (increasing practical complexity).","Stakeholder implications (owners/operators/maintainers) are implied rather than stated, so determining compliance burdens requires further documents.","Administrative clarity (clear record of supersession) reduces interpretive complexity but shifts investigative effort to find the replacing AD."],"plain_english_summary":"This Civil Aviation Safety Authority Schedule entry records that AD/G73/18 for Frakes (Grumman) G73 series aeroplanes has been superseded by AD/G73/21.  \n\nOwners, operators and maintainers of G73 aircraft must obtain and follow AD/G73/21 for current mandatory requirements; this entry provides no compliance details itself."}},"importantCases":[],"_links":{"self":"/api/acts/ad-g73-18-superseded-by-ad-g73-21","history":"/api/acts/ad-g73-18-superseded-by-ad-g73-21/history","analysis":"/api/acts/ad-g73-18-superseded-by-ad-g73-21/analysis","conflicts":"/api/acts/ad-g73-18-superseded-by-ad-g73-21/conflicts","importantCases":"/api/acts/ad-g73-18-superseded-by-ad-g73-21/important-cases","documents":"/api/acts/ad-g73-18-superseded-by-ad-g73-21/documents"}}