{"id":"F2006B04477","name":"AD/BELL 206/21 - Cyclic Stick Lever Assembly P/N 206-00-339-1 - Inspection","slug":"ad-bell-206-21-cyclic-stick-lever-assembly-p-n-206-00-339-1-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44314,"registerId":"commonwealth-F2006B04477-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BELL 206/21 - Cyclic Stick Lever Assembly P/N 206-00-339-1 - 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)  Bell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 Series Helicopters\n\n \n\nAD/BELL 206/21  Cyclic Stick Lever Assembly P/N 206-00-339-1 - Inspection\n\n\n9/69\n\n \n\nApplicability: All model 206A and AB-206A equipped with dual controls which were delivered prior to 15 July 1969 and any model in which dual control kit P/N 206-706-006-1, -3, or -5 was installed prior to that date.\n\n \n\nDocument: Bell SB No. 206A-13.\n\n \n\nCompliance: Within 10 hours time in service after 21 August 1969. Background: AD/Agusta 206/12 equivalent.\n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The supplied text sets a narrowly defined requirement: inspect cyclic stick lever assembly P/N 206-00-339-1 on specified aircraft in accordance with Bell SB No. 206A-13 within 10 hours TIS (Applicability; Document; Compliance). The text does not indicate any change to that scope from an earlier or original intent; it simply notes equivalence to AD/Agusta 206/12 (Background)."},"complexity_factors":["Narrow technical scope: single part number (P/N 206-00-339-1) and single service bulletin (Bell SB No. 206A-13) reduce legal and operational ambiguity (Document; Applicability).","Short compliance window: 10 hours time in service imposes tight scheduling and implementation pressure on operators (Compliance).","Clear applicability criteria by model, delivery date and kit P/N simplifies identification of affected aircraft (Applicability).","No alternative compliance or exemption language present in the supplied text increases rigidity but reduces procedural complexity (Document; Compliance).","Cross-reference to an equivalent foreign AD (AD/Agusta 206/12) requires awareness of related documents but does not expand substantive requirements (Background)."],"plain_english_summary":"What this instrument does, mechanically\n\n- It requires an inspection of the cyclic stick lever assembly, part number 206-00-339-1, on certain Bell 206 helicopters. The inspection must be carried out in accordance with Bell Service Bulletin No. 206A-13 (Document) and completed within 10 hours time in service after 21 August 1969 (Compliance).\n\nWho and which aircraft it affects\n\n- The requirement applies to: all model 206A and AB-206A helicopters equipped with dual controls that were delivered prior to 15 July 1969; and any model helicopter in which dual control kit P/N 206-706-006-1, -3, or -5 was installed prior to that date (Applicability).\n\nWhy the directive exists (as stated in the source)\n\n- The text identifies this instrument as an Airworthiness Directive and notes it is equivalent to AD/Agusta 206/12 (Background). The directive therefore directs a mandatory inspection action rather than setting out broader regulatory changes.\n\nWho pays, who decides, and what must change in behaviour\n\n- The Civil Aviation Safety Authority issues the directive (by inclusion in the Schedule of Airworthiness Directives). Operators and owners of affected helicopters must arrange for the required inspection to be carried out in accordance with the Bell service bulletin within the stated 10-hour window (Document; Compliance; Applicability). Practically, the operator will need to schedule maintenance, provide access to the aircraft, and bear the labour and any associated downtime or minor parts costs needed to complete the inspection.\n\nCosts, incentives, trade-offs and implementation issues (grounded in the source text)\n\n- Compliance burden and timing: the instrument sets a short, fixed compliance window (10 hours time in service after 21 August 1969) (Compliance). That creates an immediate scheduling requirement for affected operators and may require short-term grounding until the inspection is completed.\n\n- Specification and limiting scope: the AD points to a specific part number and a specific service bulletin (P/N 206-00-339-1; Bell SB No. 206A-13) (Document; Applicability). This narrows the technical scope and reduces ambiguity about what must be inspected, but it also ties the required method to the manufacturer’s bulletin.\n\n- Effects on businesses and maintenance providers: the requirement concentrates work on operators of the specified helicopters and on maintenance organisations qualified to perform inspections listed in the service bulletin. The directive therefore transfers immediate demand to those maintenance providers and creates a short-term cost for aircraft owners/operators (Applicability; Document; Compliance).\n\n- Discretion and alternatives: the text provides a mandatory inspection requirement and a compliance deadline. It does not, in the text provided, set out alternative means of compliance or exemptions. That limits administrative discretion in how compliance is satisfied, other than following the referenced service bulletin (Document; Compliance).\n\n- Background linkage: the AD is presented as equivalent to an earlier AD (AD/Agusta 206/12), which may indicate coordination or harmonisation with that instrument; the source does not elaborate further on the relationship (Background).\n\nNet practical effect\n\n- Operators of the listed aircraft must arrange and pay for an inspection of the specified cyclic stick lever assembly following Bell SB No. 206A-13 within the 10-hour window. The action is narrowly targeted by model, delivery date and kit P/N, and intends a specific maintenance intervention rather than broader regulatory change (Applicability; Document; Compliance; Background)."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a historical Airworthiness Directive from 1969 with a narrow, specific scope targeting a particular part on specific helicopter models. It has not expanded beyond its original safety purpose."},"complexity_factors":["Very short document (approximately 150 words)","Only 3 defined elements: applicability criteria, reference document (Bell SB No. 206A-13), and compliance deadline","No cross-references to other legislation or regulations beyond the parent Civil Aviation Regulations 1998","Simple conditional logic: single applicability test based on model, dual control configuration, and delivery/installation date","Single compliance action with clear deadline","Historical document with no ongoing amendments or nested exceptions"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for specific helicopters.\n\n**What it does:**\nOrders owners and operators of certain Bell 206 and Agusta-Bell 206 helicopters to inspect a specific part called the **\"cyclic stick lever assembly\"** (part number 206-00-339-1). This is the control stick that pilots use to steer the helicopter.\n\n**Who it affects:**\n- Bell 206A and Agusta-Bell AB-206A helicopters with dual controls (two sets of flight controls, typically for training)\n- Only those delivered **before 15 July 1969**\n- Or any model where a specific dual control kit was installed before that date\n\n**Why it matters:**\nThe directive was issued because there was likely a safety defect or failure risk with this particular lever assembly. The \"Background\" note mentions this is equivalent to a previous Italian directive (AD/Agusta 206/12), suggesting this was a known international safety issue. Helicopters must complete the inspection within **10 hours of flying time** after 21 August 1969.\n\n**In short:** If you owned one of these specific older training helicopters in 1969, you had to get this control stick inspected quickly or you couldn't legally fly."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-206-21-cyclic-stick-lever-assembly-p-n-206-00-339-1-inspection","history":"/api/acts/ad-bell-206-21-cyclic-stick-lever-assembly-p-n-206-00-339-1-inspection/history","analysis":"/api/acts/ad-bell-206-21-cyclic-stick-lever-assembly-p-n-206-00-339-1-inspection/analysis","conflicts":"/api/acts/ad-bell-206-21-cyclic-stick-lever-assembly-p-n-206-00-339-1-inspection/conflicts","importantCases":"/api/acts/ad-bell-206-21-cyclic-stick-lever-assembly-p-n-206-00-339-1-inspection/important-cases","documents":"/api/acts/ad-bell-206-21-cyclic-stick-lever-assembly-p-n-206-00-339-1-inspection/documents"}}