{"id":"F2006B04385","name":"AD/BELL 205/49 - Elevator to Horn Assembly Attachment - Modification","slug":"ad-bell-205-49-elevator-to-horn-assembly-attachment-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44210,"registerId":"commonwealth-F2006B04385-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BELL 205/49 - Elevator to Horn Assembly Attachment - Modification","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-description: CASA Airworthiness Directive\nmeta-generator: Aspose.Words for .NET 22.10.0\nmeta-keywords: Issue 1/1985,Rotorcraft,Bell Helicopter Textron 205 Series Helicopters,Elevator to Horn Assembly Attachment - Modification,49\ntitle: Airworthiness Directive - AD/BELL 205/49 - Elevator to Horn Assembly Attachment - Modification\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\nBell Helicopter Textron 205 Series Helicopters\n\n \n\nAD/BELL 205/49 Elevator to Horn Assembly Attachment - Modification\n\n\n1/85\n\n \n\nApplicability: All models.\n\n \n\nRequirement: Bell Alert S.B. No. 205-84-21.\n\n \n\nCompliance: Unless already accomplished, before 1 March 1985 or prior to the issue of the next Maintenance Release after 31 January 1985, whichever is the later.\n\n \n\nBackground: Several reports have been received of bolt lugs cracking on elevator spar fittings and horn assemblies. Loss of an elevator in flight could result in airframe or tail rotor damage.\n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1867},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive maintains a narrow, technical scope focused solely on the elevator-to-horn assembly attachment modification for Bell 205 helicopters. It does not expand beyond the original safety remediation purpose of addressing the cracked bolt lugs defect."},"complexity_factors":["Single external reference to unpublished technical document (Bell Alert S.B. No. 205-84-21) containing actual implementation details","Conditional compliance deadline using 'whichever is the later' logic","Technical aviation terminology requiring specialized domain knowledge (elevator spar fittings, horn assemblies, Maintenance Release)"],"plain_english_summary":"**What this does:** This is a mandatory safety order (called an Airworthiness Directive) for all Bell 205 series helicopters operated in Australia. It requires operators to modify how the elevator—the moving surface on the tail that controls the aircraft's pitch—attaches to the horn assembly (the mechanism that moves it).\n\n**Who it affects:** Owners and operators of all models of Bell Helicopter Textron 205 Series helicopters.\n\n**Why it matters:** The bolts and lugs connecting these parts have been cracking. If an elevator detaches during flight, it could damage the airframe or tail rotor, potentially causing loss of control and a crash.\n\n**What must be done:** Operators must carry out the modification described in **Bell Alert Service Bulletin No. 205-84-21** before the earlier of: (1) 1 March 1985, or (2) the aircraft's next scheduled maintenance check after 31 January 1985. If the fix has already been done, no further action is required."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-205-49-elevator-to-horn-assembly-attachment-modification","history":"/api/acts/ad-bell-205-49-elevator-to-horn-assembly-attachment-modification/history","analysis":"/api/acts/ad-bell-205-49-elevator-to-horn-assembly-attachment-modification/analysis","conflicts":"/api/acts/ad-bell-205-49-elevator-to-horn-assembly-attachment-modification/conflicts","importantCases":"/api/acts/ad-bell-205-49-elevator-to-horn-assembly-attachment-modification/important-cases","documents":"/api/acts/ad-bell-205-49-elevator-to-horn-assembly-attachment-modification/documents"}}