{"id":"F2007L02449","name":"AD/BELL 222/25 Amdt 1 - Main Rotor Pendulum Weight Support","slug":"ad-bell-222-25-amdt-1-main-rotor-pendulum-weight-support","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":67920,"registerId":"commonwealth-F2007L02449-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Bell Helicopter Textron Canada (BHTC) 22","sectionType":"division","heading":"Bell Helicopter Textron Canada (BHTC) 222 Series Helicopters","content":"### Bell Helicopter Textron Canada (BHTC) 222 Series Helicopters\n\n| AD/BELL 222/25 Amdt 1 | Main Rotor Pendulum Weight Support | 9/2007 |\n| --------------------- | ---------------------------------- | ------ |\n\n| Applicability: | All BHTC Model 222, 222B, 222U, and 230 helicopters.                                                                                                                                                                                                                                                                                                           |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Remove main rotor pendulum weight supports part number 222-011-114-103, as identified with serial numbers having the prefix “HD”, and replace with a serviceable part; in accordance with Bell Helicopter Textron Alert Service Bulletin 222-01-91, 222U-01-62 or 230-01-24, as applicable.Note: Transport Canada AD CF-2001-28 refers.                        |\n| Compliance:    | Unless already accomplished, before 30 September 2007.                                                                                                                                                                                                                                                                                                         |\n|                | This Amendment becomes effective on 30 August 2007.                                                                                                                                                                                                                                                                                                            |\n| Background:    | The manufacturer received a report of an incident where one of the main rotor pendulum weight support failed, shedding the pendulum weight set in flight. Subsequent investigation revealed that the failed support had manufacturing discrepancies.Amendment 1 is issued to include the Model 230 helicopter in applicability and change the compliance time. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n11 July 2007","sortOrder":0},{"sectionNumber":"AD/BELL 222/25 Amdt 1","sectionType":"part","heading":"AD/BELL 222/25 Amdt 1","content":"## AD/BELL 222/25 Amdt 1","sortOrder":1},{"sectionNumber":"Main Rotor Pendulum Weight Support","sectionType":"part","heading":"Main Rotor Pendulum Weight Support","content":"## Main Rotor Pendulum Weight Support","sortOrder":2},{"sectionNumber":"9/2007","sectionType":"part","heading":"9/2007","content":"## 9/2007","sortOrder":3}],"analysis":{"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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":true,"description":"This is Amendment 1 to an existing AD. The original directive (implied by the amendment number) was expanded to include the Model 230 helicopter in addition to the original 222 series models, and the compliance deadline was changed. This represents a modest expansion of scope to cover additional aircraft affected by the same manufacturing defect."},"complexity_factors":["Single, specific mechanical defect addressed with clear part numbers and serial number prefixes","Straightforward replacement requirement referencing external manufacturer bulletins","Simple applicability criteria (four specific helicopter models)","Single compliance deadline with no conditional exceptions or alternative methods","No defined terms section or complex cross-referencing within the instrument itself","Background explanation limited to one paragraph"],"plain_english_summary":"This CASA Airworthiness Directive orders owners/operators of Bell 222, 222B, 222U and 230 helicopters to replace defective main rotor pendulum weight supports (units with serials beginning \"HD\") with serviceable parts by 30 September 2007. It’s mandatory because manufacturing defects allowed an in‑flight failure that detached a pendulum weight, creating a severe crash risk."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Amendment 1 \"is issued to include the Model 230 helicopter in applicability and change the compliance time.\" Effect: applicability is broadened to add Model 230 and the compliance timeframe was adjusted, altering who must comply and by when (Background; Compliance)."},"complexity_factors":["Narrow technical trigger: specific part number and serial‑prefix requirement increases inspection precision (Applicability; Requirement).","Mandatory compliance deadline requires operators to schedule maintenance and replacements by a set date (Compliance).","Dependence on manufacturer Alert Service Bulletin for procedures and the meaning of 'serviceable' creates reliance on an external document (Requirement).","Amendment 1 expands applicability to include Model 230 and changes the compliance time, adding scope and timeline changes to manage (Background).","Cross‑reference to Transport Canada AD introduces an inter‑jurisdictional link that may affect interpretation or parallel obligations (Requirement note).","Operational action is mechanically simple (remove and replace), which reduces legal and technical ambiguity (Requirement)."],"plain_english_summary":"This Airworthiness Directive requires removal and replacement of main rotor pendulum weight supports (P/N 222-011-114-103 with serials prefixed “HD”) on Bell 222, 222B, 222U and 230 helicopters, to be done according to the manufacturer’s alert service bulletin by 30 September 2007. It responds to a reported in‑flight loss traced to a manufacturing discrepancy; the direct costs and compliance effort fall on operators who must identify affected parts and install serviceable replacements within the compliance period."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-222-25-amdt-1-main-rotor-pendulum-weight-support","history":"/api/acts/ad-bell-222-25-amdt-1-main-rotor-pendulum-weight-support/history","analysis":"/api/acts/ad-bell-222-25-amdt-1-main-rotor-pendulum-weight-support/analysis","conflicts":"/api/acts/ad-bell-222-25-amdt-1-main-rotor-pendulum-weight-support/conflicts","importantCases":"/api/acts/ad-bell-222-25-amdt-1-main-rotor-pendulum-weight-support/important-cases","documents":"/api/acts/ad-bell-222-25-amdt-1-main-rotor-pendulum-weight-support/documents"}}