{"id":"F2006B08722","name":"AD/DAUPHIN/1 - Tail Rotor and Tail Gearbox Support - Inspection","slug":"ad-dauphin-1-tail-rotor-and-tail-gearbox-support-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":51939,"registerId":"commonwealth-F2006B08722-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DAUPHIN/1 - Tail Rotor and Tail Gearbox Support - 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)  Eurocopter SA 360 and SA 365 (Dauphin) Series Helicopters\n\n \n\n# AD/DAUPHIN/1 Tail Rotor and Tail Gearbox Support - Inspection\n\nApplicability: All SA 360C, SA 361, SA 365C and SA365C1 helicopters. Document:  Dauphin SB No. 05.02.\n\nCompliance: As per requirement document.\n\n# 7/79\n\n \n\nBackground: Several cases of cracking have been observed at the junction of the three arms on the ring of the support assembly on overseas registered helicopters.\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":1706},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive remains focused on its original 1979 purpose: addressing the specific cracking defect in tail rotor support assemblies. There is no evidence of scope expansion beyond the initial safety concern."},"complexity_factors":["External document incorporation by reference (Service Bulletin No. 05.02) — the actual inspection steps are not included in the directive itself","Narrow applicability limited to four specific aircraft model variants","No defined terms, exceptions, or conditional provisions within the directive text"],"plain_english_summary":"**What this is:** An Airworthiness Directive (AD) — a mandatory safety order issued by the Civil Aviation Safety Authority (CASA) that has the force of law.\n\n**What it requires:** Owners and operators must inspect the tail rotor and tail gearbox support assembly on specific helicopters for dangerous cracks.\n\n**Which aircraft:** All Eurocopter (now Airbus) Dauphin models: SA 360C, SA 361, SA 365C, and SA 365C1.\n\n**Why it matters:** Cracks have been discovered where three arms connect to the support ring on overseas-registered helicopters. If this part fails, the tail rotor could separate from the aircraft, causing catastrophic loss of control.\n\n**How to comply:** Follow the inspection procedures detailed in the manufacturer's Service Bulletin No. 05.02 (referenced in the document)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dauphin-1-tail-rotor-and-tail-gearbox-support-inspection","history":"/api/acts/ad-dauphin-1-tail-rotor-and-tail-gearbox-support-inspection/history","analysis":"/api/acts/ad-dauphin-1-tail-rotor-and-tail-gearbox-support-inspection/analysis","conflicts":"/api/acts/ad-dauphin-1-tail-rotor-and-tail-gearbox-support-inspection/conflicts","importantCases":"/api/acts/ad-dauphin-1-tail-rotor-and-tail-gearbox-support-inspection/important-cases","documents":"/api/acts/ad-dauphin-1-tail-rotor-and-tail-gearbox-support-inspection/documents"}}