{"id":"F2006L00446","name":"AD/BELL 412/49 - Rescue Hoist P/N BL10300-60 and P/N BL10300-59","slug":"ad-bell-412-49-rescue-hoist-p-n-bl10300-60-and-p-n-bl10300-59","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":117135,"registerId":"commonwealth-F2006L00446-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Bell Helicopter Textron 412 Series Helic","sectionType":"division","heading":"Bell Helicopter Textron 412 Series Helicopters","content":"### Bell Helicopter Textron 412 Series Helicopters\n\n| AD/BELL 412/49 | Rescue Hoist P/N BL10300-60and P/N BL10300-59 | 3/2006 |\n| -------------- | --------------------------------------------- | ------ |\n\n| Applicability: | All Model AB412 helicopters, equipped with rescue hoist part number BL10300-60 or part number BL10300-59.                                                                                                                                                                                                       |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with Agusta Technical Bulletin No. 412-59 Revision A.Note: ENAC AD 1998-186 refers.                                                                                                                                                                                                        |\n| Compliance:    | For Part I of the Requirement document: At each pre-flight inspection after16 March 2006.For Part II of the Requirement document: At each 25-hour inspection after accomplishment of Part I.For Part III of the Requirement document: At intervals not to exceed 12 months; after the last 12 month inspection. |\n|                | This Airworthiness Directive becomes effective on 16 March 2006.                                                                                                                                                                                                                                                |\n| Background:    | The manufacturer requires certain actions to prevent loss of the affected rescue hoist’s hook assembly.                                                                                                                                                                                                         |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n2 February 2006","sortOrder":0},{"sectionNumber":"AD/BELL 412/49","sectionType":"part","heading":"AD/BELL 412/49","content":"## AD/BELL 412/49","sortOrder":1},{"sectionNumber":"Rescue Hoist P/N BL10300-60 and P/N BL10","sectionType":"part","heading":"Rescue Hoist P/N BL10300-60 and P/N BL10300-59","content":"## Rescue Hoist P/N BL10300-60  \nand P/N BL10300-59","sortOrder":2},{"sectionNumber":"3/2006","sectionType":"part","heading":"3/2006","content":"## 3/2006","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow Airworthiness Directive targeting a specific safety defect in specific equipment. It has not expanded beyond its original purpose of addressing the rescue hoist hook assembly failure risk."},"complexity_factors":["Very short document (approximately 200 words)","Only 2 defined part numbers and 1 helicopter model specified","Simple three-tier compliance schedule (pre-flight, 25-hour, 12-month)","Single cross-reference to Agusta Technical Bulletin (external document)","No nested conditions or exceptions","Clear effective date and straightforward applicability criteria"],"plain_english_summary":"CASA's mandatory AD requires operators of Bell Model AB412 helicopters fitted with rescue hoists P/N BL10300‑60 or BL10300‑59 to inspect and maintain the hoist hook assembly, with pre‑flight visual checks, 25‑flight‑hour inspections and annual maintenance to mitigate risk of hook detachment during rescues.\n\nIt affects emergency services and search-and-rescue operators using these aircraft; compliance is legally required to remain airworthy in Australia."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The AD’s scope aligns with its stated purpose in the source: it targets AB412 helicopters with hoists P/N BL10300-60 or BL10300-59 and mandates actions to prevent loss of the hoist hook assembly. No expansion or narrowing of that population or of mandated inspection types is indicated in the text."},"complexity_factors":["Narrow applicability: limited to all Model AB412 helicopters fitted with hoist P/N BL10300-60 or BL10300-59 (Applicability).","External normative reference: requires actions “in accordance with Agusta Technical Bulletin No. 412-59 Revision A” rather than prescribing steps in the AD itself (Requirement) — operators must obtain and follow the bulletin.","Tiered, recurring compliance schedule: Part I at each pre‑flight after 16 March 2006; Part II at each 25‑hour inspection after Part I; Part III at intervals not to exceed 12 months (Compliance).","Immediate effective date: AD becomes effective 16 March 2006, reducing lead time for operators (Compliance / Effective date).","Operational burden concentrated on operators: recurring inspections and maintenance time/costs paid by operators; potential downtime during inspections (inferred from Compliance schedule).","Regulatory enforcement: actions mandated by the AD and tied to manufacturer bulletin leave limited regulatory prescription but create dependency on manufacturer instructions (Requirement / Background)."],"plain_english_summary":"This AD requires operators of Bell AB412 helicopters fitted with rescue hoist P/N `BL10300-60` or `BL10300-59` to perform the inspection and maintenance actions set out in Agusta Technical Bulletin No. 412-59 Revision A. It prescribes a tiered compliance schedule — checks at each pre-flight, at each 25‑hour inspection, and an annual check — effective 16 March 2006, intended to prevent loss of the hoist hook assembly. Operators must obtain and follow the referenced technical bulletin."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-412-49-rescue-hoist-p-n-bl10300-60-and-p-n-bl10300-59","history":"/api/acts/ad-bell-412-49-rescue-hoist-p-n-bl10300-60-and-p-n-bl10300-59/history","analysis":"/api/acts/ad-bell-412-49-rescue-hoist-p-n-bl10300-60-and-p-n-bl10300-59/analysis","conflicts":"/api/acts/ad-bell-412-49-rescue-hoist-p-n-bl10300-60-and-p-n-bl10300-59/conflicts","importantCases":"/api/acts/ad-bell-412-49-rescue-hoist-p-n-bl10300-60-and-p-n-bl10300-59/important-cases","documents":"/api/acts/ad-bell-412-49-rescue-hoist-p-n-bl10300-60-and-p-n-bl10300-59/documents"}}