{"id":"F2006B10688","name":"AD/HU 369/24 - Tail Rotor Drive Shaft Damper - Inspection","slug":"ad-hu-369-24-tail-rotor-drive-shaft-damper-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116640,"registerId":"commonwealth-F2006B10688-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HU 369/24 - Tail Rotor Drive Shaft Damper - 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)  McDonnell Douglas (Hughes) and Kawasaki 369 Series Helicopters\n\n \n\nAD/HU 369/24 Tail Rotor Drive Shaft Damper - Inspection 3/77\n\nApplicability: Model 369HS S/No. 0661S, 0662S, 0668S, 0675S, 0678S, 0680S, 0681S, 0686S, 0690S, 0693S, 0695S, 0696S, 0702S, thru 0764S, 0767S thru 0773S, 0775S thru\n\n0794S, 0796S thru 0810S, 0812S thru 0814S, 0817S thru 0819S, 0824S, 0826S,\n\n0845S, Model 369HM S/No. 0260M thru 0271M, 0274M, 0275M, 0278M thru\n\n0292M.\n\n \n\nDocument: Hughes SIN No. HN-110.\n\n \n\nCompliance: In accordance with the 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","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1409},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This airworthiness directive maintains a narrow, technical scope focused solely on mandatory safety inspection of a single component (tail rotor drive shaft damper) on enumerated helicopter models. It does not expand beyond its original aviation safety purpose into broader operational or administrative requirements."},"complexity_factors":["Very short document (under 200 words) with only four operative sections","External incorporation by reference—all technical requirements contained in referenced manufacturer document (Hughes SIN HN-110)","Highly specific applicability limited to enumerated serial numbers rather than broad categories","No conditional logic, exceptions, or nested definitions within the directive text itself"],"plain_english_summary":"**What this is:** A mandatory safety directive (called an Airworthiness Directive) issued by the Civil Aviation Safety Authority (CASA) that requires helicopter operators to inspect a specific mechanical part—the tail rotor drive shaft damper.\n\n**Who it affects:** Owners and operators of specific McDonnell Douglas (Hughes) and Kawasaki 369 Series Helicopters. The directive lists exact serial numbers that must comply, including:\n- Model 369HS: S/No. 0661S, 0662S, 0668S, and many others through 0845S\n- Model 369HM: S/No. 0260M through 0292M (specific ranges listed)\n\n**What you must do:** Inspect the tail rotor drive shaft damper following the exact procedures in **Hughes Service Information Notice No. HN-110**. The directive itself doesn't spell out the inspection steps—it legally mandates that you must follow that specific manufacturer's document.\n\n**Why it matters:** This ensures the tail rotor system (which keeps the helicopter stable and prevents it from spinning) remains airworthy and safe to operate."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hu-369-24-tail-rotor-drive-shaft-damper-inspection","history":"/api/acts/ad-hu-369-24-tail-rotor-drive-shaft-damper-inspection/history","analysis":"/api/acts/ad-hu-369-24-tail-rotor-drive-shaft-damper-inspection/analysis","conflicts":"/api/acts/ad-hu-369-24-tail-rotor-drive-shaft-damper-inspection/conflicts","importantCases":"/api/acts/ad-hu-369-24-tail-rotor-drive-shaft-damper-inspection/important-cases","documents":"/api/acts/ad-hu-369-24-tail-rotor-drive-shaft-damper-inspection/documents"}}