{"id":"F2007L02454","name":"AD/BELL 222/41 - Main Rotor Grips and Flapping Bearing Assemblies","slug":"ad-bell-222-41-main-rotor-grips-and-flapping-bearing-assemblies","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":67952,"registerId":"commonwealth-F2007L02454-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 222/41 | Main Rotor Grips andFlapping Bearing Assemblies | 9/2007 |\n| -------------- | ----------------------------------------------- | ------ |\n\n| Applicability: | All Model 230 helicopters.                                                                                                                                                                                                                                        |\n| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with Transport Canada AD CF-98-17.                                                                                                                                                                                                           |\n| Compliance:    | Unless already accomplished, within 10 flight hours after 30 August 2007.                                                                                                                                                                                         |\n|                | This Airworthiness Directive becomes effective on 30 August 2007.                                                                                                                                                                                                 |\n| Background:    | Fatigue cracks were reported at the bolt holes of the main rotor pitch horn and in the flapping bearing assembly. This Directive requires certain actions to ensure proper torque on the retaining bolts of the main rotor grips and flapping bearing assemblies. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n11 July 2007","sortOrder":0},{"sectionNumber":"AD/BELL 222/41","sectionType":"part","heading":"AD/BELL 222/41","content":"## AD/BELL 222/41","sortOrder":1},{"sectionNumber":"Main Rotor Grips andFlapping Bearing Ass","sectionType":"part","heading":"Main Rotor Grips andFlapping Bearing Assemblies","content":"## Main Rotor Grips and  \nFlapping Bearing Assemblies","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":false,"description":"This is a standard, narrow Airworthiness Directive addressing a specific safety defect in a specific aircraft model. It has not expanded beyond its original purpose of mandating inspection and maintenance for fatigue cracks in rotor components."},"complexity_factors":["Very short document (under 300 words)","Only one substantive requirement: comply with an external Canadian directive (CF-98-17)","No defined terms section","No cross-references to other Australian legislation","Simple conditional logic: 'unless already accomplished'","Single applicability criterion (Model 230 helicopters)"],"plain_english_summary":"This mandatory Airworthiness Directive applies to all Bell 230 helicopters in Australia, requiring inspection and maintenance of main rotor grips and flapping bearing assemblies per Transport Canada AD CF-98-17. It responds to fatigue cracks found in pitch horn bolt holes and bearings that could cause catastrophic rotor failure, and required action within 10 flight hours after 30 August 2007. Compliance is legally enforceable for operators/owners."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD adopts Transport Canada AD CF-98-17 for the aircraft named in the document and sets a compliance deadline; it does not, on its face, expand or narrow the corrective action mandated by the referenced AD. Note: the instrument contains an internal inconsistency in the aircraft model listed (heading vs Applicability), which creates uncertainty about the intended scope but does not indicate an expressed change to the corrective measures."},"complexity_factors":["Cross-reference to Transport Canada AD CF-98-17 — compliance requires obtaining and following a separate foreign airworthiness directive (Requirement).","Short compliance window — action must be completed within 10 flight hours after 30 August 2007 (Compliance).","Technical, safety‑critical maintenance task — torque checks and inspection of retaining bolts and bearings require qualified maintenance personnel and possible parts/rectification.","Applicability text inconsistency — heading refers to BHTC 222 series while Applicability line states “All Model 230 helicopters,” creating ambiguity about exact affected fleet (Applicability).","Enforcement and effective date are explicit — CASA delegate signs and the AD becomes effective 30 August 2007, leaving operators little time to plan (Compliance; Effective date)."],"plain_english_summary":"This directive requires operators to follow Transport Canada AD CF-98-17 to inspect and ensure correct torque of the main rotor grip and flapping bearing retaining bolts after reports of fatigue cracking. It applies to the helicopters listed (the instrument states “All Model 230 helicopters”) and must be complied with within 10 flight hours after 30 August 2007. Operators must schedule and pay for the inspections/maintenance; the Civil Aviation Safety Authority enforces the requirement."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-222-41-main-rotor-grips-and-flapping-bearing-assemblies","history":"/api/acts/ad-bell-222-41-main-rotor-grips-and-flapping-bearing-assemblies/history","analysis":"/api/acts/ad-bell-222-41-main-rotor-grips-and-flapping-bearing-assemblies/analysis","conflicts":"/api/acts/ad-bell-222-41-main-rotor-grips-and-flapping-bearing-assemblies/conflicts","importantCases":"/api/acts/ad-bell-222-41-main-rotor-grips-and-flapping-bearing-assemblies/important-cases","documents":"/api/acts/ad-bell-222-41-main-rotor-grips-and-flapping-bearing-assemblies/documents"}}