{"id":"F2006B04405","name":"AD/BELL 205/68 - Tail Rotor Counterweight Bellcrank Retention Nut","slug":"ad-bell-205-68-tail-rotor-counterweight-bellcrank-retention-nut","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44230,"registerId":"commonwealth-F2006B04405-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.","sortOrder":0},{"sectionNumber":"AD/BELL 205/68 Tail Rotor Counterweight ","sectionType":"part","heading":"AD/BELL 205/68 Tail Rotor Counterweight Bellcrank","content":"# AD/BELL 205/68 Tail Rotor Counterweight Bellcrank\n\nRetention Nut\n\nApplicability: Model 205A-1 and 205B helicopters. Requirement: 1. For 205A-1 helicopters:","sortOrder":1},{"sectionNumber":"9/2001","sectionType":"part","heading":"9/2001","content":"#   \n9/2001\n\nDM","sortOrder":2}],"analysis":{"kimi_summary":{"content_quality":"rejected","complexity_score":3,"rejection_reason":"This appears to be a fragmented, corrupted, or poorly extracted document with significant formatting errors, repeated headers, truncated content (the 205B requirements are cut off), and nonsensical elements ('9/2001 9/2001', 'DM'). The substantive content is incomplete and the document structure is broken.","scope_assessment":{"changed":false,"description":"This appears to be a standard, narrow Airworthiness Directive focused on a specific mechanical defect in specific aircraft models. No evidence of scope creep beyond original safety purpose."},"complexity_factors":["Very short document (appears to be an extract or fragment)","Minimal defined terms (only standard aviation terminology)","Simple conditional structure: applicability → requirement → compliance","No nested exceptions or complex cross-referencing visible","Straightforward applicability limited to two specific helicopter models","Single mechanical component focus"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by the Civil Aviation Safety Authority (CASA) for specific Bell helicopter models.\n\n**What it does:**\n- Requires owners and operators of **Bell 205A-1 and 205B helicopters** to take specific safety action regarding the **tail rotor counterweight bellcrank retention nut** — a mechanical component in the helicopter's tail rotor system.\n\n**Why it matters:**\n- The tail rotor is critical for helicopter control and stability. A failure in this component could lead to loss of control of the aircraft.\n- The AD mandates corrective action to address an identified \"unsafe condition\" (a known defect or potential failure mode).\n\n**Who must comply:**\n- Anyone operating or maintaining the specified Bell helicopter models.\n\n**What must be done:**\n- The document indicates there are specific requirements for the 205A-1 model (the 205B requirements appear truncated in this extract), with compliance deadlines and instructions detailed in the full directive.\n\n**Key point:** This is a **safety-critical compliance requirement** — ignoring it means the aircraft cannot legally fly."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"Based on the supplied text, the AD's scope is limited to Bell Model 205A-1 and 205B helicopters concerning the tail rotor counterweight bellcrank retention nut (see \"Applicability\" and the AD title). The supplied fragment follows the standard AD template (delegate issues mandatory corrective action under CAR subregulation 39.1(1)). There is no evidence in the supplied text that the AD's scope departs from that original, model-specific corrective scope, but the absence of the detailed requirement and compliance text prevents a complete determination of any narrower or broader sub-scope (for example, by serial number, installation configuration, or compliance timing)."},"complexity_factors":["Legal delegation and reference to CAR 1998 subregulation 39.1(1) (creates administrative procedure complexity)","Narrow technical subject matter (tail rotor counterweight bellcrank retention nut) requiring specialist maintenance knowledge","Mandatory compliance tied to an external \"requirement\" and \"compliance\" section that are not included in the supplied text (information incompleteness increases practical complexity)","Operational implications for owners/operators (scheduling, parts, downtime) despite short textual length","Potential interface with maintenance organisations, parts suppliers and continuing airworthiness records"],"plain_english_summary":"This Airworthiness Directive, issued by a CASA delegate, mandates corrective action on the tail-rotor counterweight bellcrank retention nut for Bell 205A‑1 and 205B helicopters to address an identified unsafe condition. It legally obliges owners/operators and maintenance providers to carry out the AD’s prescribed inspection/repair within its stated timeframe, creating compliance costs, parts/labour needs and aircraft downtime. Exact procedures and timing are set in the AD’s requirement and compliance text."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-205-68-tail-rotor-counterweight-bellcrank-retention-nut","history":"/api/acts/ad-bell-205-68-tail-rotor-counterweight-bellcrank-retention-nut/history","analysis":"/api/acts/ad-bell-205-68-tail-rotor-counterweight-bellcrank-retention-nut/analysis","conflicts":"/api/acts/ad-bell-205-68-tail-rotor-counterweight-bellcrank-retention-nut/conflicts","importantCases":"/api/acts/ad-bell-205-68-tail-rotor-counterweight-bellcrank-retention-nut/important-cases","documents":"/api/acts/ad-bell-205-68-tail-rotor-counterweight-bellcrank-retention-nut/documents"}}