{"id":"F2006B04896","name":"AD/CERES/7 Amdt 1 - Turnover Truss - Modification","slug":"ad-ceres-7-amdt-1-turnover-truss-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44716,"registerId":"commonwealth-F2006B04896-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CERES/7 Amdt 1 - Turnover Truss - Modification","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)  C.A.C. CA-28 (Ceres) Series Aeroplanes\n\n \n\nAD/CERES/7\n\nAmdt 1\n\n\nTurnover Truss - Modification 9/99\n\n \n\nApplicability: C.A.C. “Ceres” Aeroplanes S/Nos. 5(VH-CDO), 6(VH-CEG) and 13(VH-SSF). Document:               Ceres SB No. 45.\n\nCompliance: Not later than 21 January 1980.\n\n \n\nThis Amendment becomes effective on 9 September 1999.\n\n \n\nNote: Modifications performed in accordance with AD/CA-28/7 satisfy the requirements of this Directive.\n\n \n\nBackground:  In a recent accident involving overturn on landing the overturn truss collapsed with fatal consequences for the pilot.\n\n \n\nThe original issue of this Airworthiness Directive became effective on 31 January 1980.\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":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1763},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This Amendment 1 (effective 1999) maintains the identical scope to the original 1980 directive. It merely adds a cross-reference clarifying that compliance with an earlier related directive (AD/CA-28/7) satisfies this requirement, without expanding applicability beyond the three specified aircraft."},"complexity_factors":["Extremely narrow applicability limited to 3 specific aircraft serial numbers","Single compliance requirement with no alternatives or exceptions","No defined terms, interpretation provisions, or cross-references to legislation","Document contains fewer than 150 words","No conditional logic or procedural steps"],"plain_english_summary":"This is a safety order (called an **Airworthiness Directive**) issued by the Civil Aviation Safety Authority. It requires owners of three specific vintage C.A.C. Ceres aircraft (serial numbers 5, 6, and 13) to modify a safety structure called the \"turnover truss\" — a metal frame designed to protect the pilot if the plane flips over on landing.\n\n**Why it matters:** After a fatal accident where this truss collapsed during an overturn, the authority mandated a structural fix detailed in **Ceres Service Bulletin No. 45**. Owners must have this modification completed by **21 January 1980**.\n\n**Who is affected:** Only the operators of the three specific aircraft listed (registration marks VH-CDO, VH-CEG, and VH-SSF). If you already modified your aircraft under an earlier related directive (AD/CA-28/7), you don't need to do it again."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ceres-7-amdt-1-turnover-truss-modification","history":"/api/acts/ad-ceres-7-amdt-1-turnover-truss-modification/history","analysis":"/api/acts/ad-ceres-7-amdt-1-turnover-truss-modification/analysis","conflicts":"/api/acts/ad-ceres-7-amdt-1-turnover-truss-modification/conflicts","importantCases":"/api/acts/ad-ceres-7-amdt-1-turnover-truss-modification/important-cases","documents":"/api/acts/ad-ceres-7-amdt-1-turnover-truss-modification/documents"}}