{"id":"F2006B04664","name":"AD/BELL 412/30 - Swashplate Support Assembly","slug":"ad-bell-412-30-swashplate-support-assembly","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44416,"registerId":"commonwealth-F2006B04664-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BELL 412/30 - Swashplate Support Assembly","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)  Bell Helicopter Textron 412 Series Helicopters\n\n \n\nAD/BELL 412/30 Swashplate Support Assembly 4/92\n\nTX\n\nApplicability: All model 412 helicopters if fitted with Swashplate Support Assembly P/N 412-010- 453-101.\n\n \n\nRequirement: Action in accordance with Bell Alert Service Bulletin 412-92-57 Rev A and 412-92- 58.\n\n \n\nCompliance: 1. For compliance with ASB 412-97-57 Rev A,\n\n \n\nPart I Daily after receipt of this Directive, and\n\n \n\nPart II Within 10 hours time in service after 10 February 1992; and\n\n \n\n2. For compliance with ASB 412-92-58, before further flight after receipt of this directive.\n\n \n\nBackground: The manufacturer has received reports of cracking in the stainless steel Swashplate Support Assembly.\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":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The Directive, as presented, targets Bell 412 helicopters fitted with Swashplate Support Assembly P/N 412-010-453-101 and mandates compliance with two specified manufacturer Alert Service Bulletins to address reported cracking. The text contains no indication that the scope was altered from an earlier or different intent; it sets a narrow scope defined by aircraft model and part number and prescribes the same manufacturer procedures for all in-scope aircraft (Applicability; Requirement; Background)."},"complexity_factors":["References to external technical documents (Bell Alert Service Bulletins 412-92-57 Rev A and 412-92-58) rather than containing step-by-step procedures (Requirement).","Multiple and differing compliance deadlines (daily inspections; within 10 hours time in service; before further flight) that create scheduling complexity for operators (Compliance).","Applicability limited to a single part number fitted to a model series, requiring accurate parts/installation records to determine whether an aircraft is in scope (Applicability).","Technical nature of required actions necessitates qualified maintenance personnel and access to manufacturer procedures (Requirement).","Immediate safety-driven constraint (actions required before further flight for one ASB) that can remove aircraft from service until compliance is achieved (Compliance, item 2)."],"plain_english_summary":"The Civil Aviation Safety Authority mandates that Bell 412 helicopters fitted with Swashplate Support Assembly P/N 412-010-453-101 comply with manufacturer Alert Service Bulletins ASB 412-92-57 Rev A and ASB 412-92-58 to address reported cracking. Operators must perform daily Part I inspections and meet short deadlines (Part II within 10 hours TIS; ASB 412-92-58 actions before further flight), bearing the cost and operational disruption and relying on manufacturer procedures and qualified maintenance personnel."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive issued in 1992 (as indicated by '4/92' in the reference number). It addresses a specific mechanical defect in a specific helicopter model. There is no indication of scope creep; the directive remains tightly focused on its original purpose of addressing the cracked swashplate support assembly."},"complexity_factors":["Single, specific mechanical component targeted (one part number)","Clear, unambiguous applicability clause","Two discrete compliance actions with specific timelines","No defined terms section or interpretation provisions","No cross-references to other legislation beyond the enabling regulations","Straightforward conditional logic (if fitted with X, then do Y)","Background section provides clear rationale for the safety action"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations 1998.\n\n**What it does:**\nThis directive requires owners and operators of specific Bell 412 helicopters to inspect and potentially repair a part called the **Swashplate Support Assembly** (part number 412-010-453-101). The swashplate is a critical component that translates pilot control inputs into the movement of the helicopter's rotor blades.\n\n**Why it matters:**\nThe manufacturer (Bell Helicopter Textron) discovered **cracking in the stainless steel swashplate support**. If this part fails in flight, the pilot could lose control of the helicopter, with potentially catastrophic results.\n\n**Who must comply:**\nAnyone operating a Bell 412 helicopter fitted with the specific swashplate part mentioned above.\n\n**What must be done:**\nOperators must follow two separate Bell Alert Service Bulletins:\n- **ASB 412-92-57 Rev A:** Requires daily inspections starting immediately, plus a detailed inspection within 10 flight hours after 10 February 1992\n- **ASB 412-92-58:** Must be completed before the helicopter flies again after receiving this directive\n\n**The bottom line:**\nThis is an urgent safety fix. The \"before further flight\" requirement for one of the bulletins means affected helicopters are grounded until the work is done."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-412-30-swashplate-support-assembly","history":"/api/acts/ad-bell-412-30-swashplate-support-assembly/history","analysis":"/api/acts/ad-bell-412-30-swashplate-support-assembly/analysis","conflicts":"/api/acts/ad-bell-412-30-swashplate-support-assembly/conflicts","importantCases":"/api/acts/ad-bell-412-30-swashplate-support-assembly/important-cases","documents":"/api/acts/ad-bell-412-30-swashplate-support-assembly/documents"}}