{"id":"F2006B04459","name":"AD/BELL 206/144 - Rotor Mast Collective Lever","slug":"ad-bell-206-144-rotor-mast-collective-lever","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44296,"registerId":"commonwealth-F2006B04459-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\n![](image.002.png)\n\n![](image.002.png)  \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 206/144 Rotor Mast Collective Le","sectionType":"part","heading":"AD/BELL 206/144 Rotor Mast Collective Lever 8/2000","content":"# AD/BELL 206/144 Rotor Mast Collective Lever 8/2000\n\nDM\n\nApplicability: All models with Collective lever P/N 206-010-467-001 installed.\n\nRequirement: Action in accordance with Bell ASBs 206-00-93 Rev.A, or 206L-00-116 as appropriate.\n\nNote: Canadian AD CF-2000-13 refers.\n\nCompliance: Inspect within 30 days after the effective date of this directive, and modify as necessary in accordance with the Requirement Document.\n\nThis Airworthiness Directive becomes effective on 5 July 2000.\n\nBackground: This directive is raised to advise operators that there may be forging excess on certain collective levers which may restrict movement of the collective pitch control system.\n\n![Signature: Bernard Malcolm Hole](image.003.png)  \n\nBernard Malcolm Hole\n\nDelegate of the Civil Aviation Safety Authority 23 June 2000\n\n![](image.002.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 5 July 2000.","sortOrder":1}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, targeted airworthiness directive addressing a specific manufacturing defect in a particular helicopter part. The scope remains precisely limited to the identified safety issue with the collective lever forging excess."},"complexity_factors":["Very short document (approximately 250 words)","Only 1 defined applicability criterion (part number 206-010-467-001)","Single requirement referencing external technical documents (Bell Service Bulletins)","Simple compliance timeline (30 days from effective date)","No nested conditions, exceptions, or cross-references to other legislation","Straightforward cause-and-effect: unsafe condition → mandatory inspection → modification if needed"],"plain_english_summary":"This AD mandates inspections and, if needed, modification or replacement of the collective lever (P/N 206-010-467-001) on certain Bell 206 helicopters because excess forging material can restrict collective movement. Owners/operators must inspect the part within 30 days of July 5, 2000 and follow Bell Service Bulletins 206-00-93 Rev.A or 206L-00-116 to correct any defects. The fix prevents loss of proper vertical control."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The AD’s scope remains limited to aircraft with collective lever P/N 206-010-467-001 and requires inspection and modification per the Bell ASBs to correct forging excess that may restrict collective pitch movement. The directive implements that original safety objective without expanding applicability or introducing new kinds of obligation beyond inspection and corrective modification within the 30‑day compliance window."},"complexity_factors":["Narrow technical scope: applies only to collective lever P/N 206-010-467-001 (low breadth of affected fleet).","Dependency on external documents: compliance requires following Bell ASBs 206-00-93 Rev.A or 206L-00-116.","Short compliance window: inspection required within 30 days of the AD’s effective date.","Potential remedial variability: directive allows modification \"as necessary,\" creating variable repair scope and cost per aircraft.","Regulatory reference: issued under subregulation 39.1(1) of CAR 1998, tying it to delegated administrative authority.","Cross-reference to foreign AD: notes Canadian AD CF-2000-13, creating multi-jurisdictional alignment considerations."],"plain_english_summary":"This Airworthiness Directive orders operators of aircraft fitted with collective lever P/N 206-010-467-001 to inspect the rotor‑mast collective lever within 30 days and to modify it if necessary, following the specified Bell Alert Service Bulletins (206-00-93 Rev.A or 206L-00-116). It is issued by a CASA delegate under subregulation 39.1(1) of CAR 1998 to address potential forging excess that may restrict collective pitch movement. Operators bear the cost and must follow the manufacturer service instructions and the AD’s timing requirements."},"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-206-144-rotor-mast-collective-lever","history":"/api/acts/ad-bell-206-144-rotor-mast-collective-lever/history","analysis":"/api/acts/ad-bell-206-144-rotor-mast-collective-lever/analysis","conflicts":"/api/acts/ad-bell-206-144-rotor-mast-collective-lever/conflicts","importantCases":"/api/acts/ad-bell-206-144-rotor-mast-collective-lever/important-cases","documents":"/api/acts/ad-bell-206-144-rotor-mast-collective-lever/documents"}}