{"id":"F2006B04455","name":"AD/BELL 206/140 - Collective Idler Link and Collective Lever","slug":"ad-bell-206-140-collective-idler-link-and-collective-lever","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44292,"registerId":"commonwealth-F2006B04455-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BELL 206/140 - Collective Idler Link and Collective Lever","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nBell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 Series Helicopters\n\nAD/BELL 206/140 Collective Idler Link and Collective Lever 13/98\n\nApplicability: All BHTC Model 206L-4 helicopters.\n\nRequirement: To ensure that part numbers of the collective idler link and collective lever correspond with the proper airworthiness life limitations, accomplish the following:\n\n    Check the part number (P/N) and assign the proper corresponding retirement life as per the following schedule:\n\n| Item | Part Number                                                                                                                                    | Retirement Life |\n| ---- | ---------------------------------------------------------------------------------------------------------------------------------------------- | --------------- |\n| (a)  | Collective Idler Link P/N 206-010-446-105 Serial No. A-1 through A-27 and RE-238 through RE- 270                                               | 1200 hours      |\n| (b)  | Collective Idler Link P/N 206-010-446-105 having serial numbers other than those in (a) above, and Collective Idler Link P/N 206-010- 446-107. | 4800 hours      |\n| (c)  | Collective Lever P/N 206-010-447-105 Serial A-1 through A-22                                                                                   | 1200 hours      |\n| (d)  | Collective Lever P/N 206-010-447-105 having serial numbers other than those in (c) above, and Collective Lever P/N 206-010-447-109             | 4800 hours      |\n\n    2. Remove from service all parts that have already reached or exceeded their airworthiness limitation and replace them with serviceable parts.\n\n    3. Re-identify the collective idler link and collective lever that have a retirement life of 4800 hours to the new part numbers, as outlined below and in Part II of BHTC Alert Service Bulletin 206L-98-110:\n\n| Component             | Old Part Number | New Part Number   |\n| --------------------- | --------------- | ----------------- |\n| Collective Lever Link | 206-010-446-105 | 206-010-446-107FM |\n| Collective Lever      | 206-010-447-105 | 206-010-447-109FM |\n\nNote: Transport Canada AD CF-98-20 refers.\n\nCompliance: Unless already accomplished, within 100 hours time in service after 3 December 1998.\n\nThis Airworthiness Directive becomes effective on 3 December 1998.\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\nBackground: It has been determined that the collective idler link and the collective lever, when manufactured from two different materials, have substantially different airworthiness lives, while still being identified with a single part number. Parts manufactured from forged material have a longer life than those of rolled plate stock. Therefore, re- identification of the affected parts and corresponding life limitation are necessary.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Previously identical part numbers covered items with different materials and thus different fatigue lives. The AD splits the scope by assigning two retirement lives and issuing new part numbers for the longer‑life items, and applies this change to all BHTC Model 206L-4 helicopters. Operators must now treat formerly identical PNs as distinct service‑life categories and re‑mark affected parts."},"complexity_factors":["Multiple part numbers and specific serial number ranges to check (e.g. Collective Idler Link P/N 206-010-446-105 with serials A-1–A-27 and RE-238–RE-270 versus other serials).","Two distinct retirement lives to assign (1,200 hours and 4,800 hours) depending on PN/serial number.","Mandatory removal and replacement of any part that has reached or exceeded its assigned airworthiness limitation.","Requirement to re‑identify longer‑life parts to new part numbers (206-010-446-107FM and 206-010-447-109FM) per BHTC Alert Service Bulletin 206L-98-110 Part II.","Short compliance window: within 100 hours time in service after 3 December 1998.","Cross-reference to Transport Canada AD CF-98-20 and reliance on the manufacturer's alert service bulletin for re‑identification procedure."],"plain_english_summary":"This Airworthiness Directive requires operators of Bell 206L-4 helicopters to inspect specified collective idler links and collective levers, assign each item the correct retirement life (either 1,200 or 4,800 flight hours) by part number and serial number, remove parts that have reached those lives, and re‑identify longer‑life items to new part numbers. The rule must be complied with within 100 hours time in service after 3 December 1998. The regulator says the change separates parts that, though sharing a part number, were made from different materials and therefore have different fatigue lives; operators pay for inspections, replacements, re‑identification and associated downtime."},"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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive remains tightly focused on its original purpose: correcting a specific part numbering error for two components in Bell 206L-4 helicopters. The scope has not expanded beyond this original safety issue."},"complexity_factors":["Single, specific mechanical issue with narrow applicability (one helicopter model)","Clear tabular format for part numbers and serial number ranges","Straightforward three-step compliance requirement","No nested exceptions or conditional logic—just serial number lookups","Minimal cross-referencing (only one referenced service bulletin and Transport Canada directive)","Short document with plain language background explanation"],"plain_english_summary":"This Airworthiness Directive orders Australian operators of Bell 206L-4 helicopters to inspect the collective idler link and collective lever because both shared a part number despite differing materials and fatigue lives (1,200 vs 4,800 flight hours). Operators must check serial numbers, immediately replace parts that have exceeded their safe life, and relabel long-life parts to prevent future confusion, all within 100 flight hours of 3 December 1998. This prevents in‑flight control failures."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-206-140-collective-idler-link-and-collective-lever","history":"/api/acts/ad-bell-206-140-collective-idler-link-and-collective-lever/history","analysis":"/api/acts/ad-bell-206-140-collective-idler-link-and-collective-lever/analysis","conflicts":"/api/acts/ad-bell-206-140-collective-idler-link-and-collective-lever/conflicts","importantCases":"/api/acts/ad-bell-206-140-collective-idler-link-and-collective-lever/important-cases","documents":"/api/acts/ad-bell-206-140-collective-idler-link-and-collective-lever/documents"}}