{"id":"F2006B10022","name":"AD/G1159/20 - Wing Trailing Edge Structure - Inspection","slug":"ad-g1159-20-wing-trailing-edge-structure-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55408,"registerId":"commonwealth-F2006B10022-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/G1159/20 - Wing Trailing Edge Structure - Inspection","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/G1159/20 Wing Trailing Edge Structure - Inspection 5/77\n\nApplicability: All models.\n\n \n\nDocument: Grumman Customer Bulletin No. 235. Compliance: As per requirement document.\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":1012},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This airworthiness directive maintains its original narrow scope: mandating a specific structural inspection for specific aircraft models. No scope creep detected."},"complexity_factors":["Single operative provision incorporating external technical document by reference","No interpretation section or defined terms","No conditional exceptions or nested regulatory logic","Document is essentially a pointer to Grumman Customer Bulletin No. 235"],"plain_english_summary":"**What this requires**: Owners and operators of Gulfstream G1159 and G-IV series aircraft must inspect the wing trailing edge structure according to the procedures in Grumman Customer Bulletin No. 235.\n\n**Who it affects**: Anyone who owns, operates, or maintains these specific Gulfstream (formerly Grumman) business jets.\n\n**Why it matters**: This is a mandatory safety directive issued by the Civil Aviation Safety Authority (CASA). It ensures potential structural defects in the wing trailing edge are identified and fixed before they compromise flight safety. Failure to comply grounds the aircraft (makes it illegal to fly)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-g1159-20-wing-trailing-edge-structure-inspection","history":"/api/acts/ad-g1159-20-wing-trailing-edge-structure-inspection/history","analysis":"/api/acts/ad-g1159-20-wing-trailing-edge-structure-inspection/analysis","conflicts":"/api/acts/ad-g1159-20-wing-trailing-edge-structure-inspection/conflicts","importantCases":"/api/acts/ad-g1159-20-wing-trailing-edge-structure-inspection/important-cases","documents":"/api/acts/ad-g1159-20-wing-trailing-edge-structure-inspection/documents"}}