{"id":"F2006B10027","name":"AD/G1159/25 - Windows - Inspection and Modification","slug":"ad-g1159-25-windows-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55420,"registerId":"commonwealth-F2006B10027-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/G1159/25 - Windows - Inspection and 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)  Gulfstream (Grumman) G1159 and G-IV Series Aeroplanes\n\n \n\nAD/G1159/25 Windows - Inspection and Modification 12/78\n\nApplicability: All models.\n\n \n\nDocument: Grumman Customer Bulletin No. 269.\n\n \n\nCompliance: Within 600 hours time in service or 12 calendar months after 31 December 1978.\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\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1515},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope: mandating specific window inspections and modifications for Gulfstream G1159 and G-IV aircraft. No evidence of legislative creep or expansion beyond this specific airworthiness issue."},"complexity_factors":["Extremely short instrument with only three operative components (applicability, document reference, compliance deadline)","No interpretation section or defined terms","Single unconditional compliance requirement","No exceptions, exemptions, or nested conditions"],"plain_english_summary":"This legally binding Airworthiness Directive requires owners/operators and maintenance engineers of Grumman-built Gulfstream G1159 and G‑IV series jets to inspect and modify the airplane windows per Grumman Customer Bulletin No. 269. The work must be completed within 600 flight hours or within 12 months after 31 December 1978 (whichever is earlier). Compliance is mandatory to maintain legal airworthiness in Australia due to identified safety risks with the windows."}},"importantCases":[],"_links":{"self":"/api/acts/ad-g1159-25-windows-inspection-and-modification","history":"/api/acts/ad-g1159-25-windows-inspection-and-modification/history","analysis":"/api/acts/ad-g1159-25-windows-inspection-and-modification/analysis","conflicts":"/api/acts/ad-g1159-25-windows-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-g1159-25-windows-inspection-and-modification/important-cases","documents":"/api/acts/ad-g1159-25-windows-inspection-and-modification/documents"}}