{"id":"F2005L04154","name":"AD/BELL 412/46 - External Rescue Hoist Cable Cut Electrical Circuit","slug":"ad-bell-412-46-external-rescue-hoist-cable-cut-electrical-circuit","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":40176,"registerId":"commonwealth-F2005L04154-current","compilationNumber":null,"startDate":"2026-04-01","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 412/46 | External Rescue Hoist CableCut Electrical Circuit | 2/2006 DM |\n| -------------- | ------------------------------------------------- | --------- |\n\n| Applicability: | Agusta-Bell Model 412 EP helicopters equipped with external rescue hoists with the following part numbers (P/N):                                                                                                                                              |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|                | 412-8800-01-202 (Breeze-Eastern BL-20200-402)412-8800-01-412 (Breeze-Eastern BL-20200-412)                                                                                                                                                                    |\n| Requirement:   | If not previously accomplished, carry out an inspection of the hoist cable cut electrical circuit and install a cable cut pyrotechnic cartridge. Both actions are to accomplished in accordance with Agusta Bollettino Tecnico 412-112 dated 7 November 2005. |\n|                | Note: ENAC (Italy) AD 2005-484 (EASA Approval 2005-6412) refers.                                                                                                                                                                                              |\n| Compliance:    | Before further external hoist operation, but no later than 31 December 2005.                                                                                                                                                                                  |\n|                | This Airworthiness Directive becomes effective on 21 December 2005.                                                                                                                                                                                           |\n| Background:    | Agusta has received reports of inadvertent firing hoist cable cartridges. This Directive requires a one time inspection of the hoist cable cut electrical circuit for correct operation and allows the reinstallation of the cable cut pyrotechnic cartridge. |\n\n![](image.001.png)  \nCharles Lenarcic  \nDelegate of the Civil Aviation Safety Authority\n\n16 December 2005","sortOrder":0},{"sectionNumber":"AD/BELL 412/46","sectionType":"part","heading":"AD/BELL 412/46","content":"## AD/BELL 412/46","sortOrder":1},{"sectionNumber":"External Rescue Hoist CableCut Electrica","sectionType":"part","heading":"External Rescue Hoist CableCut Electrical Circuit","content":"## External Rescue Hoist Cable  \nCut Electrical Circuit","sortOrder":2},{"sectionNumber":"2/2006 DM","sectionType":"part","heading":"2/2006 DM","content":"## 2/2006 DM","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"Scope remains aligned with the directive’s stated corrective action: a one‑time inspection of the hoist cable‑cut electrical circuit and installation of the pyrotechnic cartridge where absent, limited to the specified Model 412 EP helicopters and hoist part numbers, to be completed by the stated deadline."},"complexity_factors":["Narrow applicability — only Agusta‑Bell Model 412 EP helicopters with specific hoist part numbers (P/N 412-8800-01-202 and 412-8800-01-412).","Requires both an electrical-circuit inspection and potential installation of a pyrotechnic cable‑cut cartridge, creating a mixed electrical and ordnance-handling task.","Mandated compliance timeline: inspection/installation before further external hoist operation and no later than 31 December 2005; noncompliance restricts operational use.","Work must follow Agusta Bollettino Tecnico 412-112 (manufacturer procedure), so technical discretion is delegated to that bulletin’s mandated steps.","Safety-critical nature raises procedural and record-keeping burdens (handling of pyrotechnic devices, verification of circuit operation).","References foreign regulator documents (ENAC AD 2005-484 and EASA Approval 2005-6412), adding cross-jurisdictional compliance context."],"plain_english_summary":"This Airworthiness Directive requires operators of Agusta‑Bell Model 412 EP helicopters fitted with the listed Breeze‑Eastern external rescue hoists to inspect the hoist cable‑cut electrical circuit and, if needed, install a cable‑cut pyrotechnic cartridge in accordance with Agusta Bollettino Tecnico 412‑112. Work must be done before further external hoist use and by 31 December 2005.\n\nIt responds to reports of inadvertent cartridge firing; operators bear the cost, must suspend external‑hoist operations until compliant, and must follow the manufacturer’s procedure and the referenced ENAC/EASA approval."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific reported defect in specific helicopter equipment. It has not expanded beyond its original purpose of mandating inspection and replacement of faulty hoist components."},"complexity_factors":["Very short document (approximately 200 words of substantive content)","Only 2 specific part numbers identified in applicability","Single, straightforward requirement: inspect and install","Clear, fixed compliance deadline with no conditional extensions","No defined terms section or interpretation provisions","No cross-references to other legislation (only references to technical bulletins and foreign aviation authority documents)","Simple binary applicability test (specific helicopter model + specific hoist part numbers)"],"plain_english_summary":"This CASA Airworthiness Directive required operators of Agusta‑Bell Model 412 EP helicopters fitted with Breeze‑Eastern external rescue hoists (PN 412‑8800‑01‑202 / ‑412) to inspect the hoist emergency cable‑cut circuit and install a replacement pyrotechnic cartridge to prevent accidental firings. It was a mandatory, one‑time safety action to be completed before further hoist use, no later than 31 December 2005."},"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-412-46-external-rescue-hoist-cable-cut-electrical-circuit","history":"/api/acts/ad-bell-412-46-external-rescue-hoist-cable-cut-electrical-circuit/history","analysis":"/api/acts/ad-bell-412-46-external-rescue-hoist-cable-cut-electrical-circuit/analysis","conflicts":"/api/acts/ad-bell-412-46-external-rescue-hoist-cable-cut-electrical-circuit/conflicts","importantCases":"/api/acts/ad-bell-412-46-external-rescue-hoist-cable-cut-electrical-circuit/important-cases","documents":"/api/acts/ad-bell-412-46-external-rescue-hoist-cable-cut-electrical-circuit/documents"}}