{"id":"F2006B04464","name":"AD/BELL 206/149 - Magnetic Brakes","slug":"ad-bell-206-149-magnetic-brakes","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44301,"registerId":"commonwealth-F2006B04464-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.001.png)\n\n![](image.001.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.\n\nBell Helicopter Textron Canada\n\n(BHTC) 206 and Agusta Bell 206 Series Helicopters","sortOrder":0},{"sectionNumber":"AD/BELL 206/149 Magnetic Brakes 2/2002 D","sectionType":"part","heading":"AD/BELL 206/149 Magnetic Brakes 2/2002 DM","content":"# AD/BELL 206/149 Magnetic Brakes 2/2002 DM\n\nApplicability: Agusta-Bell AB 206B helicopters equipped with magnetic brakes Part Number (P/N) 204-001-376-3 manufactured by Memcor Truohm (Vendor P/N MP498-3).\n\nNote 1: Magnetic brakes P/N 204-001-376-3 with Serial Numbers 48150, 48152,\n\n48165, 48166, 48169, 48170, 48171 and 48172 are not affected by this Directive.\n\nRequirement: Verify the correct installation of the cyclic magnetic brake adjustable stop screws in accordance with Agusta Bollettino Technico 206-236 dated 19 November 2001.\n\nNote 2: Italian Ente Nazionale per l’Aviazone Civile AD 2001-524 refers.\n\nCompliance: Within 25 hours time in service after the effective date of this Directive, but no later than 28 February 2002.\n\nThis Airworthiness Directive becomes effective on 16 January 2002.\n\nBackground: Agusta has received reports that adjustable stop screws on magnetic brake P/N 204- 001-376-3 had backed out and limited the travel of the arm assembly. Investigation revealed that brake units manufactured by Memcor Truohm Inc under P/N MP498-3 had the stop screws installed without the proper adhesive.\n\nThis Directive requires an inspection to verify correct installation of the adjustable stop screws.\n\n![Signature: Neville Probert](image.002.png)  \n\nNeville Probert\n\nDelegate of the Civil Aviation Safety Authority 8 January 2002\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 16 January 2002.","sortOrder":1}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The Directive’s scope remains focused on verifying and, if necessary, correcting the installation of adjustable stop screws on the specified brake part number for AB 206B helicopters. The AD excludes certain serial numbers (Note 1) and references the manufacturer bulletin for procedure (Requirement). There is no text in the AD indicating an expansion or narrowing of scope from an earlier measure; it simply prescribes inspection and verification tied to the identified manufacturing defect (Background)."},"complexity_factors":["Narrow applicability: applies only to Agusta‑Bell AB 206B helicopters fitted with magnetic brake P/N 204‑001‑376‑3 (Applicability).","Serial‑number exclusions add a small layer of filtering: specific SNs listed are not affected (Note 1).","Mandates an inspection and verification to be performed in accordance with an external manufacturer bulletin (Agusta Bollettino 206‑236) rather than prescribing procedure detail in the AD (Requirement).","Short, mandatory compliance window: within 25 hours time in service or by a fixed calendar date (Compliance) increases operational scheduling pressure for operators.","Root cause and scope are narrowly defined in the Background (missing adhesive on stop screws), limiting mandated corrective action to verification/correction of screw installation.","Issued under regulatory power and signed by a CASA delegate (subregulation 39.1(1) of CAR 1998; signature), so compliance is compulsory and enforceable by the regulator.","Cross‑referenced foreign AD increases traceability requirements (Note 2: Italian AD 2001‑524), requiring operators to consult multiple documents.","Operational cost and responsibility fall to aircraft operators to inspect and, if necessary, perform corrective work or shop visits (Requirement; Compliance) — cost not quantified in the AD."],"plain_english_summary":"This Airworthiness Directive requires operators of Agusta‑Bell AB 206B helicopters fitted with Memcor Truohm magnetic brakes (P/N 204‑001‑376‑3) to inspect the cyclic brake adjustable stop screws and confirm they are correctly installed, following Agusta Bollettino 206‑236. A short list of serial numbers is excluded. The check must be done within 25 flight hours or by 28 February 2002 because screws were found backing out where adhesive had not been used."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive maintains its original narrow scope — addressing a specific safety defect in a specific helicopter brake component. There is no evidence of scope creep; it targets exactly the unsafe condition identified in the background."},"complexity_factors":["Very short document (approximately 300 words)","Only 1 defined term (Part Number/P/N)","Single, straightforward requirement with clear applicability criteria","No cross-references to other legislation or complex conditional logic","Simple compliance deadline (25 hours OR fixed date)","Limited exceptions clearly listed in a single note"],"plain_english_summary":"This safety order requires owners/operators of Agusta‑Bell AB 206B helicopters fitted with Memcor Truohm magnetic brakes (P/N 204‑001‑376‑3) to inspect the adjustable stop screws per Agusta Bollettino Technico 206‑236. Missing adhesive or loose screws can back out and restrict cyclic movement, risking loss of control. It’s mandatory for affected aircraft (except serials 48150, 48152, 48165, 48166, 48169–48172) within 25 flight hours or by 28 Feb 2002."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-206-149-magnetic-brakes","history":"/api/acts/ad-bell-206-149-magnetic-brakes/history","analysis":"/api/acts/ad-bell-206-149-magnetic-brakes/analysis","conflicts":"/api/acts/ad-bell-206-149-magnetic-brakes/conflicts","importantCases":"/api/acts/ad-bell-206-149-magnetic-brakes/important-cases","documents":"/api/acts/ad-bell-206-149-magnetic-brakes/documents"}}