{"id":"F2005L01764","name":"AD/BELL 222/33 - Main Rotor Pendulum Weight Support","slug":"ad-bell-222-33-main-rotor-pendulum-weight-support","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":35868,"registerId":"commonwealth-F2005L01764-current","compilationNumber":null,"startDate":"2026-04-01","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 222/33 | Main Rotor Pendulum Weight Support | 8/2005 |\n| -------------- | ---------------------------------- | ------ |\n\n| Applicability: | Model 222 helicopters, serial numbers 47006 through 47089,Model 222B helicopters, serial numbers 47131 through 47156,Model 222U helicopters, serial numbers 47501 through 47574, and,Model 230 helicopters, serial numbers 23001 through 23038;equipped with main rotor pendulum weight supports part number 222-011-114-101 and -103, excluding those with serial numbers FN-363 and subsequent. |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with Bell Helicopter Textron Canada Alert Service Bulletin 222-02-92, 222U-02-63, or 230-02-25, as applicable.Note: Transport Canada AD CF-2002-33 refers.                                                                                                                                                                                                                   |\n| Compliance:    | Within 50 hours time in service after 4 August 2005, unless already accomplished.                                                                                                                                                                                                                                                                                                                 |\n|                | This Airworthiness Directive becomes effective on 4 August 2005.                                                                                                                                                                                                                                                                                                                                  |\n| Background:    | A report was received of an incident on a Model 230 helicopter where a part number 222-011-114-103 main rotor pendulum weight support failed, shedding the pendulum weight set in flight. Investigation revealed the failed support had manufacturing discrepancies, and had a serial number with the prefix “FN”.                                                                                |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n24 June 2005","sortOrder":0},{"sectionNumber":"AD/BELL 222/33","sectionType":"part","heading":"AD/BELL 222/33","content":"## AD/BELL 222/33","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":"8/2005","sectionType":"part","heading":"8/2005","content":"## 8/2005","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a targeted safety directive addressing a specific manufacturing defect in a defined parts population. The scope remains precisely limited to the identified safety risk without expansion into broader operational or maintenance requirements."},"complexity_factors":["Multiple model variants with distinct serial number ranges (4 separate applicability categories)","Specific part number exclusions with serial number cutoffs (FN-363 and subsequent)","Cross-reference to three different manufacturer service bulletins depending on helicopter model","Reference to Canadian Transport Canada AD CF-2002-33 for additional context","Time-based compliance calculation (50 hours time in service from effective date)"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspection and repair of the main rotor pendulum weight support on certain Bell 222/222B/222U/230 helicopters (specific serial- and part-number ranges) following a in-flight pendulum weight separation. Owners/operators of the affected helicopters must follow Bell’s Alert Service Bulletins within 50 flight hours after 4 August 2005 to prevent possible catastrophic rotor failure."},"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"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument applies to a specific set of Bell 222/222B/222U/230 helicopters by serial number and to specified pendulum weight support part numbers, and requires action per the Bell Alert Service Bulletins within a defined time. The AD text contains no statement that the scope has been expanded or altered from an earlier version."},"complexity_factors":["Narrow, technical applicability defined by model numbers, serial number ranges and specific part numbers (adds precision but requires record checks).","Mandates compliance by reference to manufacturer Alert Service Bulletins rather than detailing actions in the AD (requires obtaining and following external documents).","Short compliance window (50 flight hours from effective date) increases operational urgency for affected operators.","Exclusion clause for supports with serial numbers FN-363 and subsequent requires serial-number verification of parts.","Cross-reference to Transport Canada AD CF-2002-33 introduces an external regulatory context to consider."],"plain_english_summary":"This directive requires owners/operators of specified Bell 222, 222B, 222U and 230 helicopters fitted with main rotor pendulum weight supports (P/N 222-011-114-101 and -103, excluding supports with serial numbers FN-363 and later) to carry out the corrective actions set out in the relevant Bell Alert Service Bulletin within 50 flight hours of 4 August 2005. Owners/operators pay for and arrange the inspections/repairs; the Civil Aviation Safety Authority issued the directive and enforces the compliance deadline."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-222-33-main-rotor-pendulum-weight-support","history":"/api/acts/ad-bell-222-33-main-rotor-pendulum-weight-support/history","analysis":"/api/acts/ad-bell-222-33-main-rotor-pendulum-weight-support/analysis","conflicts":"/api/acts/ad-bell-222-33-main-rotor-pendulum-weight-support/conflicts","importantCases":"/api/acts/ad-bell-222-33-main-rotor-pendulum-weight-support/important-cases","documents":"/api/acts/ad-bell-222-33-main-rotor-pendulum-weight-support/documents"}}