{"id":"F2007L02452","name":"AD/BELL 222/40 - Vertical Fin Attachment","slug":"ad-bell-222-40-vertical-fin-attachment","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":67931,"registerId":"commonwealth-F2007L02452-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 222/40 | Vertical Fin Attachment | 9/2007 |\n| -------------- | ----------------------- | ------ |\n\n| Applicability: | Model 230 helicopters, serial numbers 23001 through 23038.                                                                                                         |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | Action in accordance with Transport Canada AD CF-98-22.                                                                                                            |\n| Compliance:    | Unless already accomplished, before 30 September 2007 for paragraph 1 and 2 of the Requirement document. As specified in the Requirement document for paragraph 3. |\n|                | This Airworthiness Directive becomes effective on 30 August 2007.                                                                                                  |\n| Background:    | A loss of torque of the vertical fin attachment bolts resulted in fracture of four of the attachment bolts and loosening of the fin.                               |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n11 July 2007","sortOrder":0},{"sectionNumber":"AD/BELL 222/40","sectionType":"part","heading":"AD/BELL 222/40","content":"## AD/BELL 222/40","sortOrder":1},{"sectionNumber":"Vertical Fin Attachment","sectionType":"part","heading":"Vertical Fin Attachment","content":"## Vertical Fin Attachment","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 airworthiness directive with narrow, specific applicability. It addresses exactly one safety issue (vertical fin attachment bolts) for exactly one aircraft model series with defined serial numbers. There is no evidence of scope creep; it matches the typical purpose of ADs."},"complexity_factors":["Very short document (approximately 200 words)","Only 3 defined elements: applicability (specific serial numbers), requirement (reference to external document), and compliance dates","Single cross-reference to external Transport Canada AD CF-98-22 — the actual technical work is contained there, not here","No nested conditions or exceptions within the instrument itself","Straightforward compliance structure: do X by Y date, with one exception for paragraph 3 timing"],"plain_english_summary":"This CASA Airworthiness Directive requires owners and operators of the 38 Bell Model 230 helicopters (s/n 23001–23038) to inspect and rectify the vertical fin attachment bolts per Transport Canada AD CF-98-22. The bolts can lose torque, fracture, and allow the tail fin to detach, risking a crash.\n\nCASA has adopted the Canadian AD as legally binding in Australia; most corrective work must be done before 30 September 2007."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"No change in scope is evident from the text. The directive targets a specific subset of Model 230 helicopters (Applicability) and adopts the technical requirements set out in Transport Canada AD CF-98-22 (Requirement), with specified compliance dates (Compliance)."},"complexity_factors":["Narrow applicability: applies only to Model 230 helicopters, serial numbers 23001–23038 (Applicability).","External-reference dependency: requires following Transport Canada AD CF-98-22 rather than setting out technical steps in full (Requirement).","Deadline structure: fixed compliance date for paragraphs 1 and 2 (30 September 2007) and a different timing mechanism for paragraph 3 (Compliance).","Technical maintenance action: requires inspection/repair/securement of vertical fin attachment bolts following an identified bolt fracture/loosening risk (Background).","Limited regulatory discretion: CSA issues the AD but prescribes compliance to the referenced Transport Canada AD, leaving little interpretive space for operators (Requirement)."],"plain_english_summary":"This Airworthiness Directive requires owners/operators of Bell 230 helicopters (serials 23001–23038) to carry out the actions specified in Transport Canada AD CF-98-22 to inspect and secure the vertical fin attachment bolts. It is effective 30 August 2007.\n\nOperators must comply with paragraphs 1 and 2 by 30 September 2007 (unless already done) and with paragraph 3 as specified in the referenced AD. The Civil Aviation Safety Authority issued the directive; operators bear the compliance actions and associated costs."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-222-40-vertical-fin-attachment","history":"/api/acts/ad-bell-222-40-vertical-fin-attachment/history","analysis":"/api/acts/ad-bell-222-40-vertical-fin-attachment/analysis","conflicts":"/api/acts/ad-bell-222-40-vertical-fin-attachment/conflicts","importantCases":"/api/acts/ad-bell-222-40-vertical-fin-attachment/important-cases","documents":"/api/acts/ad-bell-222-40-vertical-fin-attachment/documents"}}