{"id":"F2006B10592","name":"AD/HU 269/18 - Tail Boom - Inspection","slug":"ad-hu-269-18-tail-boom-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116447,"registerId":"commonwealth-F2006B10592-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HU 269/18 - Tail Boom - 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)  Schweizer (Hughes) 269 Series Helicopters\n\n \n\nAD/HU 269/18 Tail Boom - Inspection 11/67\n\nApplicability: Models 269A and 269B.\n\n \n\nRequirement:  Visually inspect the tail boom for cracks originating at the bolts attaching the tail rotor transmission housing to the boom and also the horizontal stabiliser forward mounting bolt.\n\n \n\nCompliance: At intervals not exceeding 50 hours time in service after 13 May 1966.\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":1659},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive remains tightly scoped to its original purpose: preventing structural failure of the tail boom assembly on specific Schweizer helicopter models through recurring inspection. No legislative creep or expansion into broader operational requirements is evident."},"complexity_factors":["Single operative requirement (visual inspection only)","Zero defined terms requiring legislative interpretation","No cross-references to external standards or other Parts","Narrow applicability limited to two specific aircraft models","Simple, absolute compliance trigger (50-hour intervals)"],"plain_english_summary":"This is a mandatory safety check (called an **Airworthiness Directive**) for owners of Schweizer (Hughes) 269A and 269B helicopters. **What you must do:** Visually inspect the tail boom (the long strut at the back of the chopper) for cracks around two specific bolt locations — where the tail rotor gearbox attaches, and where the horizontal stabiliser bolts on. **Who it affects:** Anyone operating these specific helicopter models. **When:** Every 50 hours of flight time, starting from 13 May 1966. **Why it matters:** Cracks at these high-stress points could cause the tail boom to snap off in flight, which is generally considered catastrophic for continued aircraft operation."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hu-269-18-tail-boom-inspection","history":"/api/acts/ad-hu-269-18-tail-boom-inspection/history","analysis":"/api/acts/ad-hu-269-18-tail-boom-inspection/analysis","conflicts":"/api/acts/ad-hu-269-18-tail-boom-inspection/conflicts","importantCases":"/api/acts/ad-hu-269-18-tail-boom-inspection/important-cases","documents":"/api/acts/ad-hu-269-18-tail-boom-inspection/documents"}}