{"id":"F2006B08736","name":"AD/DAUPHIN/25 - MGB Support Bar Shackle","slug":"ad-dauphin-25-mgb-support-bar-shackle","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":51973,"registerId":"commonwealth-F2006B08736-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DAUPHIN/25 - MGB Support Bar Shackle","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)  Eurocopter SA 360 and SA 365 (Dauphin) Series Helicopters\n\n \n\nAD/DAUPHIN/25 MGB Support Bar Shackle 9/90\n\nDM\n\n \n\nApplicability: All model SA 360C, SA 361 and SA 365C, C1, C2 and C3 helicopters. Requirement:  Action in accordance with Aerospatiale Service Telex 01-27.\n\nCompliance: Within 10 hours time in service after 13 July 1990.\n\n \n\nBackground: One of the main gearbox support bar shackles has been found cracked.\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":1642},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive maintains its original narrow technical scope. It addresses a single identified safety defect (cracked MGB support bar shackles) in specific helicopter models and has not expanded to cover broader systems or aircraft types beyond the original safety concern."},"complexity_factors":["Single mechanical component addressed with no sub-categories","Single unconditional compliance deadline (10 hours time-in-service)","No interpretation section or defined terms","Only one external document referenced","Limited applicability to four specific helicopter model variants"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by the Civil Aviation Safety Authority under the Civil Aviation Regulations.\n\n**What it does**\nIt requires owners and operators of specific Eurocopter Dauphin helicopters (models SA 360C, SA 361, and SA 365C variants) to inspect and fix a dangerous defect in the **main gearbox support bar shackle** — a metal fitting that helps hold the gearbox (which transfers power from the engine to the rotors) in place.\n\n**Why it matters**\nA cracked shackle was discovered on one helicopter. If left unaddressed, the shackle could fail, potentially causing the main gearbox to detach in flight and leading to catastrophic loss of control.\n\n**What must be done**\nFollow the manufacturer's instructions in *Aerospatiale Service Telex 01-27* and complete the required action within **10 hours of flight time** after 13 July 1990."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dauphin-25-mgb-support-bar-shackle","history":"/api/acts/ad-dauphin-25-mgb-support-bar-shackle/history","analysis":"/api/acts/ad-dauphin-25-mgb-support-bar-shackle/analysis","conflicts":"/api/acts/ad-dauphin-25-mgb-support-bar-shackle/conflicts","importantCases":"/api/acts/ad-dauphin-25-mgb-support-bar-shackle/important-cases","documents":"/api/acts/ad-dauphin-25-mgb-support-bar-shackle/documents"}}