{"id":"F2006B10137","name":"AD/G73/4 - Superseded by AD/G73/21","slug":"ad-g73-4-superseded-by-ad-g73-21","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55712,"registerId":"commonwealth-F2006B10137-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/G73/4 - Superseded by AD/G73/21","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET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OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Frakes (Grumman) G73 Series Aeroplanes\n\n \n\nAD/G73/4 Superseded by AD/G73/21 NK\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n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is a navigation/redirect page indicating that AD/G73/4 has been superseded by AD/G73/21. It contains no substantive legislative content — only metadata, a title, and a supersession notice. The actual regulatory requirements are found in the current directive (AD/G73/21), not in this placeholder.","scope_assessment":{"changed":false,"description":"Not applicable — this is a navigation marker with no substantive scope to assess."},"complexity_factors":["Document is a placeholder/redirect only — contains no substantive regulatory requirements","Zero defined terms","Zero conditional provisions or cross-references","Consists entirely of metadata and a supersession notice"],"plain_english_summary":"This document is a **navigation marker** indicating that Airworthiness Directive AD/G73/4 has been replaced by a newer version, AD/G73/21.\n\n**What it is:**\n- An **Airworthiness Directive (AD)** is a mandatory safety notice issued by the Civil Aviation Safety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 directive applied to **Frakes (Grumman) G73 Series Aeroplanes** (a type of amphibious aircraft originally built by Grumman, later modified by Frakes).\n- **AD/G73/4** is no longer in force — it has been **superseded** (replaced) by **AD/G73/21**.\n- The \"NK\" notation typically indicates the directive was issued by CASA's Continuing Airworthiness Management Section.\n\n**Why it matters:**\n- Aircraft owners and maintenance engineers must follow the **current** version of an Airworthiness Directive, not superseded ones. This marker prevents confusion by clearly redirecting users to the active requirement.\n- Failing to comply with the current AD could render an aircraft unairworthy (illegal to fly)."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":true,"description":"The entry indicates the scope of regulatory obligation for Frakes (Grumman) G73 series aeroplanes has changed by replacing AD/G73/4 with AD/G73/21. This record does not set out the new substantive requirements; it only notifies that the earlier directive has been superseded and that stakeholders must consult AD/G73/21 for the current obligations (Source: Schedule of Airworthiness Directives; Civil Aviation Regulations 1998, Part 39‑105)."},"complexity_factors":["Very short entry with no substantive technical requirements included","Contains only a supersession cross‑reference (AD/G73/4 superseded by AD/G73/21)","Requires retrieval and reading of the superseding AD to determine operative obligations","Legal placement in a broader regulatory framework (Civil Aviation Regulations 1998, Part 39‑105) creates dependence on external materials","Potential for stakeholder confusion if record‑keeping/version control is weak"],"plain_english_summary":"The Schedule records that Airworthiness Directive AD/G73/4 for Frakes (Grumman) G73 series aeroplanes has been superseded by AD/G73/21. Owners, operators and maintenance organisations must stop relying on the old AD and obtain and comply with AD/G73/21 for current mandatory requirements. This entry is an administrative cross‑reference: it signals the change but does not set out the substantive actions or costs, which fall to operators to determine."}},"importantCases":[],"_links":{"self":"/api/acts/ad-g73-4-superseded-by-ad-g73-21","history":"/api/acts/ad-g73-4-superseded-by-ad-g73-21/history","analysis":"/api/acts/ad-g73-4-superseded-by-ad-g73-21/analysis","conflicts":"/api/acts/ad-g73-4-superseded-by-ad-g73-21/conflicts","importantCases":"/api/acts/ad-g73-4-superseded-by-ad-g73-21/important-cases","documents":"/api/acts/ad-g73-4-superseded-by-ad-g73-21/documents"}}