{"id":"F2006B10624","name":"AD/HU 269/64 Amdt 1 - Tail Rotor Assembly - Component Replacement, Inspection and Revised Assembly Procedures","slug":"f2006b10624","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":323463,"registerId":"commonwealth-F2006B10624-current","compilationNumber":null,"startDate":"2026-04-08","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HU 269/64 Amdt 1 - Tail Rotor Assembly - Component Replacement, Inspection and Revised Assembly Procedures","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 269/64\n\nAmdt 1\n\n\nTail Rotor Assembly - Component Replacement, Inspection and Revised Assembly Procedures\n\n\n10/83\n\n \n\nApplicability: All models referred to in Hughes SIN No. N-155.2. Document:  Hughes SIN N-155.2.\n\nCompliance: Unless already accomplished within 100 hours TIS after 31st October, 1983.\n\n \n\nBackground:  This directive is raised in issue to reflect increased model and component applicability as referred to in revised 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":1834},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":true,"description":"The amendment expands the directive's applicability to cover additional helicopter models and tail rotor components compared to the original AD, as reflected in the revised Hughes Service Information Notice N-155.2."},"complexity_factors":["Extremely short operative text (approximately 100 words)","All technical requirements delegated to external manufacturer document (Hughes SIN N-155.2)","Single conditional exemption only (compliance not required if already accomplished)","Minimal legislative drafting (essentially a pointer to engineering standards)","Only one industry abbreviation requiring interpretation (TIS)"],"plain_english_summary":"**What this does**\nThis Airworthiness Directive mandates safety-critical maintenance for Schweizer (Hughes) 269 series helicopters. It requires operators to replace specific tail rotor components, conduct inspections, and follow revised assembly procedures exactly as specified in Hughes Service Information Notice N-155.2.\n\n**Who it affects**\nOwners and operators of all Schweizer (Hughes) 269 helicopter models listed in the referenced service notice.\n\n**What you must do**\nYou must complete the specified component replacements, inspections, and assembly updates within 100 hours of flight time (\"TIS\" means Time In Service) after 31 October 1983—unless you have already performed these actions.\n\n**Why it matters**\nThis amendment expands the original safety directive to cover additional helicopter models and tail rotor components. The changes ensure critical tail rotor maintenance—which prevents potentially catastrophic mechanical failures—is performed across a broader range of aircraft in this fleet."}},"importantCases":[],"_links":{"self":"/api/acts/f2006b10624","history":"/api/acts/f2006b10624/history","analysis":"/api/acts/f2006b10624/analysis","conflicts":"/api/acts/f2006b10624/conflicts","importantCases":"/api/acts/f2006b10624/important-cases","documents":"/api/acts/f2006b10624/documents"}}