{"id":"F2006B10133","name":"AD/G73/21 - Consolidation of Previously Issued Airworthiness Directives","slug":"ad-g73-21-consolidation-of-previously-issued-airworthiness-directives","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55700,"registerId":"commonwealth-F2006B10133-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/G73/21 - Consolidation of Previously Issued Airworthiness Directives","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/G73/21 Consolidation of Previously Issued Airworthiness Directives\n\n\n9/83\n\n \n\nApplicability: All G73 Models.\n\n \n\nDocument: Grumman Service Bulletins Nos. 1, 3, 6, 10, 12, 18, 20, 23, 24 and Grumman\n\nCustomer Bulletins G73-3, -4, -5, -27, -29, -43, -46, -66, -71, -83, -88.\n\n \n\nCompliance: Prior to issue of Certificate of Airworthiness.\n\n \n\nBackground:  To reduce operators administrative workload, the requirements for initial modification and one time inspections have been consolidated above.\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":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive performs exactly its stated purpose: consolidating existing requirements without expanding them. The scope remains limited to initial airworthiness certification of G73 aircraft and does not introduce new operational restrictions, ongoing maintenance requirements, or extend to other aircraft types."},"complexity_factors":["Extremely short document (approximately 150 words of substantive content)","No defined terms section — uses plain language and aircraft model references only","No cross-references to other legislation or regulations beyond naming source documents","Single, unambiguous compliance requirement ('Prior to issue of Certificate of Airworthiness')","No conditional logic, exceptions, or nested provisions","Simple administrative consolidation with no substantive new requirements"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety notice issued by Australia's Civil Aviation Safety Authority (CASA) for aircraft.\n\n**What it does:**\nThis directive consolidates (combines into one document) multiple previous safety requirements for **Frakes (Grumman) G73 series aeroplanes** — a type of amphibious aircraft originally built by Grumman.\n\n**Who it affects:**\n- Owners and operators of all G73 model aircraft\n- Anyone seeking to obtain a **Certificate of Airworthiness** (official approval that an aircraft is safe to fly) for these planes\n\n**What it requires:**\nBefore CASA will issue a Certificate of Airworthiness for any G73 aircraft, the owner/operator must complete:\n- Specific modifications (physical changes to the aircraft)\n- One-time inspections\n\nThese requirements were previously scattered across **10 different Service Bulletins** and **10 different Customer Bulletins** from the manufacturer. This directive pulls them all together in one place to make life easier for aircraft operators.\n\n**Why it matters:**\nRather than tracking down 20 separate technical documents, operators now have a single reference point for getting these older aircraft certified as airworthy. It reduces paperwork and administrative headaches while maintaining the same safety standards."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument is explicitly presented as a consolidation of previously issued airworthiness directives to reduce administrative workload (Background). It does not, in the text provided, add new types of obligations beyond the listed initial modifications and one‑time inspections. The substantive technical requirements remain those in the referenced Service and Customer Bulletins; the AD reorganises and collates them and sets the timing requirement that they be completed prior to issuance of a Certificate of Airworthiness (Background, Document, Compliance)."},"complexity_factors":["References multiple external technical documents (Grumman Service Bulletins Nos. 1, 3, 6, 10, 12, 18, 20, 23, 24 and Customer Bulletins listed) which contain the substantive technical actions (Document).","Applicability covers all G73 models, creating broad technical coverage but not model‑specific carve outs (Applicability).","A single, non‑negotiable timing constraint: actions must be completed prior to issue of the Certificate of Airworthiness (Compliance).","Consolidation reduces administrative complexity but increases the need to cross‑check multiple referenced bulletins for exact technical steps, which can be operationally awkward if the bulletins have differing formats or scopes (Background, Document).","The AD text does not include the detailed procedural, cost, or enforcement mechanisms, requiring practitioners to consult the referenced bulletins and certification procedures for full implementation (Document, Compliance)."],"plain_english_summary":"This AD consolidates previously issued technical requirements for all Grumman (Frakes) G73 series aeroplanes into a single directive, referencing specified Grumman service/customer bulletins as the mandatory technical sources. It requires listed initial modifications and one‑time inspections to be completed before a Certificate of Airworthiness can be issued. Operators must arrange and pay for the work; the AD aims to reduce administrative tracking without changing the underlying technical actions or who bears their costs."}},"importantCases":[],"_links":{"self":"/api/acts/ad-g73-21-consolidation-of-previously-issued-airworthiness-directives","history":"/api/acts/ad-g73-21-consolidation-of-previously-issued-airworthiness-directives/history","analysis":"/api/acts/ad-g73-21-consolidation-of-previously-issued-airworthiness-directives/analysis","conflicts":"/api/acts/ad-g73-21-consolidation-of-previously-issued-airworthiness-directives/conflicts","importantCases":"/api/acts/ad-g73-21-consolidation-of-previously-issued-airworthiness-directives/important-cases","documents":"/api/acts/ad-g73-21-consolidation-of-previously-issued-airworthiness-directives/documents"}}