{"id":"F2005L02327","name":"AD/BELL 430/3 - Tail Rotor Counterweight Bellcrank","slug":"ad-bell-430-3-tail-rotor-counterweight-bellcrank","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":36701,"registerId":"commonwealth-F2005L02327-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Bell Helicopter Textron Canada (BHTC) 43","sectionType":"division","heading":"Bell Helicopter Textron Canada (BHTC) 430 Series Helicopters","content":"### Bell Helicopter Textron Canada (BHTC) 430 Series Helicopters\n\n| AD/BELL 430/3 | Tail Rotor Counterweight Bellcrank | 10/2005 TX |\n| ------------- | ---------------------------------- | ---------- |\n\n| Applicability: | Model 430 helicopters, serial numbers 49001 through 49105.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |\n| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. Identify the part number of the tail rotor counterweight bellcrank installed on the helicopter and proceed as follows:If part number 222-012-727-003 is installed, proceed to Requirement 3.If part number 222-012-727-105 without the prefix letters is installed, proceed to Requirement 2.Note 1: Part number 222-012-727-105, with the added prefix letters inscribed on the part before the serial number, satisfies the requirement of this Directive.2. Inspect the tail rotor counterweight bellcrank in accordance with Part I of Bell Helicopter Textron Canada Alert Service Bulletin (ASB) 430-04-32 Revision A.3. Remove from service, tail rotor counterweight bellcrank part numbers222-012-727-003 and 222-012-727-105 (without prefix letters), in accordance with the following Alert Service Bulletin:Model 430 helicopters with the following bellcranks:- Part number 222-012-727-105 bellcranks installed; in accordance with Part II of ASB 430-04-32 Revision A.- Part number 222-012-727-003 bellcranks installed; in accordance with ASB 430-04-30 Revision B.Note 2: Transport Canada AD CF-2005-27 refers. |\n| Compliance:    | 1. Within 10 flight hours after 19 August 2005.2. Within 10 flight hours after 19 August 2005. Repeat thereafter at intervals not to exceed 50 flight hours, until compliance with Requirement 3.3. Before 1 April 2006.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |\n\n|             | This Airworthiness Directive becomes effective on 19 August 2005.                                                                                                                                                                                                                             |\n| ----------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Background: | The manufacturer has determined that tail rotor counterweight bellcrank part numbers 222-012-727-003 and 222-012-727-105 may have manufacturing discrepancies, which can result in an in-flight failure. BHTC also has identified certain correctly manufactured parts that are not affected. |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n17 August 2005","sortOrder":0},{"sectionNumber":"AD/BELL 430/3","sectionType":"part","heading":"AD/BELL 430/3","content":"## AD/BELL 430/3","sortOrder":1},{"sectionNumber":"Tail Rotor Counterweight Bellcrank","sectionType":"part","heading":"Tail Rotor Counterweight Bellcrank","content":"## Tail Rotor Counterweight Bellcrank","sortOrder":2},{"sectionNumber":"10/2005 TX","sectionType":"part","heading":"10/2005 TX","content":"## 10/2005 TX","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The Directive confines action to specified serial numbers and part numbers and prescribes inspections and removals per Bell ASBs; nothing in the text indicates an expansion or narrowing beyond that stated safety focus."},"complexity_factors":["Limited applicability to a defined serial-number range increases administrative simplicity (Applicability).","Different treatment for two closely related part numbers requires accurate part identification by maintenance personnel (Requirement).","Short, prescriptive compliance windows and repeat intervals create scheduling pressure on operators and maintenance providers (Compliance).","Procedural work is delegated to manufacturer Alert Service Bulletins, so regulators and operators must follow external documents for technical steps (Requirement).","Removal mandated for specified parts imposes direct replacement cost and downtime on operators (Requirement; Compliance).","Cross-reference to a Transport Canada AD and multiple ASB revisions adds a minor cross-jurisdictional and document-control coordination burden (Requirement; Background)."],"plain_english_summary":"Requires Model 430 operators to inspect and, where specified, remove certain tail-rotor counterweight bellcranks that may have manufacturing defects. It applies to serials 49001–49105 and sets short compliance windows for inspection repeats and mandatory removal, relying on Bell Alert Service Bulletins for procedures. The manufacturer identified parts at risk of in‑flight failure. Helicopter operators pay for and schedule the inspections, maintenance and replacements within the flight-hour limits set by the Directive (Applicability; Requirement; Compliance; Background)."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a standard, narrowly-targeted Airworthiness Directive addressing a specific manufacturing defect in a specific helicopter model. The scope remains tightly focused on the identified safety issue without expansion into broader operational or regulatory matters."},"complexity_factors":["Multiple conditional pathways based on part number identification (3 distinct requirement branches)","Cross-reference to external technical documents: Bell Helicopter Alert Service Bulletins 430-04-32 Revision A and 430-04-30 Revision B","Nested compliance deadlines: immediate inspection (10 flight hours), recurring inspection (every 50 flight hours), and final replacement deadline (1 April 2006)","Technical distinction between part numbers with and without prefix letters requires careful reading","Reference to parallel Canadian aviation regulation (Transport Canada AD CF-2005-27)"],"plain_english_summary":"CASA requires owners/operators of Bell 430 helicopters (s/n 49001–49105) to inspect and replace the tail-rotor counterweight bellcrank. Two part numbers (222-012-727-003 and 222-012-727-105 without prefix letters) may be defective and could fail in flight, risking loss of tail-rotor control.\n\nIf you have an affected part, verify the markings now, inspect within 10 flight hours (and every 50 hours until replacement), and fit the corrected part by 1 April 2006."},"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-430-3-tail-rotor-counterweight-bellcrank","history":"/api/acts/ad-bell-430-3-tail-rotor-counterweight-bellcrank/history","analysis":"/api/acts/ad-bell-430-3-tail-rotor-counterweight-bellcrank/analysis","conflicts":"/api/acts/ad-bell-430-3-tail-rotor-counterweight-bellcrank/conflicts","importantCases":"/api/acts/ad-bell-430-3-tail-rotor-counterweight-bellcrank/important-cases","documents":"/api/acts/ad-bell-430-3-tail-rotor-counterweight-bellcrank/documents"}}