{"id":"F2006L00368","name":"AD/BELL 412/47 - Hoist Cable Cut Electrical Circuit","slug":"ad-bell-412-47-hoist-cable-cut-electrical-circuit","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116987,"registerId":"commonwealth-F2006L00368-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 412/47 | Hoist Cable Cut Electrical Circuit | 3/2006 |\n| -------------- | ---------------------------------- | ------ |\n\n| Applicability: | Agusta-Bell AB 412 helicopters equipped with a hoist.                                                                                                                                                                                                                    |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n|                | Note 1: Helicopters that have had ENAC Prescrizione di Aeronavigabilita’ (PA) (Airworthiness Directive) 2000-574 accomplished are not affected by this Directive.                                                                                                        |\n| Requirement:   | If not previously accomplished, modify the cable cut panel wire harness installation in accordance with Agusta Alert Service Bulletin 412-83 Revision A dated29 December 2000.                                                                                           |\n|                | Note 2: ENAC (Italy) AD 2001-001 refers.                                                                                                                                                                                                                                 |\n| Compliance:    | Within 30 days after the effective date of this Directive.                                                                                                                                                                                                               |\n|                | This Airworthiness Directive becomes effective on 16 March 2006.                                                                                                                                                                                                         |\n| Background:    | An operator of an AB 412 experienced the loss of a hoist hook during flight due to the firing of the cartridge even though the hoist was not operating. Inspection of the electrical installation revealed chafing of electrical wiring in the cartridge firing circuit. |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n1 February 2006","sortOrder":0},{"sectionNumber":"AD/BELL 412/47","sectionType":"part","heading":"AD/BELL 412/47","content":"## AD/BELL 412/47","sortOrder":1},{"sectionNumber":"Hoist Cable Cut Electrical Circuit","sectionType":"part","heading":"Hoist Cable Cut Electrical Circuit","content":"## Hoist Cable Cut Electrical Circuit","sortOrder":2},{"sectionNumber":"3/2006","sectionType":"part","heading":"3/2006","content":"## 3/2006","sortOrder":3}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"Scope is narrow and consistent with the directive’s stated purpose: it applies only to Agusta‑Bell AB 412 helicopters equipped with a hoist and excludes helicopters that have already complied with ENAC PA 2000‑574. The instrument mandates a specific wiring modification per Agusta Alert Service Bulletin 412‑83 Rev A and sets a 30‑day compliance deadline; there is no indication the directive expands or departs from that original technical remediation intent."},"complexity_factors":["Technical nature of the required work: modification of the cable‑cut panel wire harness per a specific Agusta Alert Service Bulletin (Requirement).","Short compliance window: work must be done within 30 days of the directive’s effective date (Compliance).","Limited but specific applicability: only Agusta‑Bell AB 412 helicopters equipped with a hoist are affected; previously completed ENAC PA 2000‑574 actions exclude an aircraft (Applicability, Note 1).","Cross‑reference to foreign authority and documents: cites Agusta Alert Service Bulletin 412‑83 Rev A and ENAC AD 2001‑001 (Requirement, Note 2), creating dependency on those documents for technical instructions.","Immediate safety impetus: background reports an actual unintended cartridge firing due to chafed wiring, which makes the directive safety‑critical and time‑sensitive (Background).","Cost and scheduling burden falls on operators to procure parts/maintenance and arrange certified work within the deadline (Requirement, Compliance).","Regulatory enforcement is direct and prescriptive with little discretion beyond the stated exclusion for prior compliance (Compliance, Applicability)."],"plain_english_summary":"This Airworthiness Directive requires Agusta‑Bell AB 412 helicopters fitted with a hoist to have the hoist cable‑cut panel wire harness modified per Agusta Alert Service Bulletin 412‑83 Revision A (29 Dec 2000) to prevent unintended firing of the cutting cartridge caused by chafed wiring. Operators must complete the modification within 30 days of the directive (effective 16 March 2006); helicopters already compliant with ENAC PA 2000‑574 are excluded. Operators pay for and schedule the technical work to meet the deadline."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard single-issue airworthiness directive addressing a specific safety defect. The scope remains tightly focused on the identified wiring chafing hazard in the hoist cable cut system."},"complexity_factors":["Very short document (under 300 words)","Only 1 substantive requirement with clear reference to external technical standard (service bulletin)","Single exception clearly marked in a note","No defined terms section","No cross-references to other legislation","Simple conditional structure: 'If not previously accomplished, do X'"],"plain_english_summary":"This AD requires owners/operators of Agusta-Bell AB 412 helicopters fitted with a hoist to modify the cable-cut panel wiring per Agusta Alert Service Bulletin 412-83 Rev A within 30 days of 16 March 2006. Helicopters already compliant with Italian AD PA 2000-574 are exempt. The change prevents chafing of the cutter firing wiring, which could cause an inadvertent release of a hoisted load, endangering people and aircraft."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-412-47-hoist-cable-cut-electrical-circuit","history":"/api/acts/ad-bell-412-47-hoist-cable-cut-electrical-circuit/history","analysis":"/api/acts/ad-bell-412-47-hoist-cable-cut-electrical-circuit/analysis","conflicts":"/api/acts/ad-bell-412-47-hoist-cable-cut-electrical-circuit/conflicts","importantCases":"/api/acts/ad-bell-412-47-hoist-cable-cut-electrical-circuit/important-cases","documents":"/api/acts/ad-bell-412-47-hoist-cable-cut-electrical-circuit/documents"}}