{"id":"F2006L00444","name":"AD/BELL 412/50 - Breeze-Eastern Rescue Hoist Assembly","slug":"ad-bell-412-50-breeze-eastern-rescue-hoist-assembly","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":117133,"registerId":"commonwealth-F2006L00444-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 412/50 | Breeze-Eastern Rescue Hoist Assembly | 3/2006 |\n| -------------- | ------------------------------------ | ------ |\n\n| Applicability: | All Model AB412 helicopters equipped with rescue hoist, part number BL-20200 series (Breeze-Eastern); without Breeze-Eastern Alert Service Bulletin (ASB) No. BL-12756-1-A25-01 Revision A incorporated.                                                                                                                                                                                                               |\n| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with Agusta Mandatory Technical Bulletin No. 412-89 original issue, or later ENAC approved revision.Insert a copy of Agusta Mandatory Technical Bulletin No. 412-89 and a copy of this directive into the Aircraft Flight Manual. These may be removed when ASB No. BL‑12756-1-A25-01 has been complied with.Note: ENAC AD 2002-450 refers.                                                       |\n| Compliance:    | For Part I of the Requirement document:Before the next flight after 16 March 2006, unless already accomplished, and before each flight when use of the rescue hoist is anticipated; until accomplishment of ASB No. BL-12756-1-A25-01 Revision A.For Part II of the Requirement document:At each flight during operation of the rescue hoist; until accomplishment of ASB No. BL-12756-1-A25-01 Revision A.            |\n|                | This Airworthiness Directive becomes effective on 16 March 2006.                                                                                                                                                                                                                                                                                                                                                       |\n| Background:    | A cable fracture occurred on a helicopter with a rescue hoist similar to the hoist installed on the Model AB412 helicopter. The cause of the cable fracture was found to be due to a malfunction of the slow-down feature, and to the crushable bumper that did not function correctly. The crushable bumper functions as a secondary sacrificial safety device should the slow-down feature fail in the up direction. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n2 February 2006","sortOrder":0},{"sectionNumber":"AD/BELL 412/50","sectionType":"part","heading":"AD/BELL 412/50","content":"## AD/BELL 412/50","sortOrder":1},{"sectionNumber":"Breeze-Eastern Rescue Hoist Assembly","sectionType":"part","heading":"Breeze-Eastern Rescue Hoist Assembly","content":"## Breeze-Eastern Rescue Hoist Assembly","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"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a standard Airworthiness Directive format. The scope remains tightly focused on the specific safety defect (hoist cable failure risk) and the specific aircraft model/helicopter configuration affected. No scope creep detected."},"complexity_factors":["Multiple conditional triggers: 'unless already accomplished', 'when use of the rescue hoist is anticipated', 'during operation of the rescue hoist'","Cross-references to external documents: Agusta Mandatory Technical Bulletin No. 412-89, Breeze-Eastern Alert Service Bulletin BL-12756-1-A25-01 Revision A, ENAC AD 2002-450","Dual compliance timelines: Part I (pre-flight/periodic) vs Part II (during operation)","Specific part number applicability (BL-20200 series) with exclusion clause (without ASB Revision A incorporated)","Administrative requirement to insert/remove documents from Aircraft Flight Manual based on compliance status"],"plain_english_summary":"This AD orders immediate safety checks and temporary operating restrictions for Bell 412 (AB412) helicopters fitted with Breeze‑Eastern BL‑20200 series rescue hoists after a cable snapped when both the slow‑down feature and crushable bumper failed. Affected operators must follow Agusta Mandatory Technical Bulletin 412‑89 before the next flight and during every hoist operation, and insert the bulletin and AD into the Aircraft Flight Manual until the manufacturer’s permanent fix is installed."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive's scope remains focused on AB412 helicopters equipped with Breeze‑Eastern BL‑20200 series rescue hoists that have not incorporated ASB BL‑12756‑1‑A25‑01 Revision A. It mandates interim inspections, AFM insertion and operational limits until the ASB is complied with; the text shows no expansion or narrowing beyond this applicability."},"complexity_factors":["Narrow but specific applicability: only Model AB412 helicopters with Breeze‑Eastern BL‑20200 series hoists lacking incorporation of ASB BL‑12756‑1‑A25‑01 Revision A (Applicability).","Dual timing requirements: Part I must be done before the next flight and before flights when hoist use is anticipated; Part II applies at each flight during hoist operation (Compliance).","Cross-references to external mandated documents and foreign ADs: Agusta Mandatory Technical Bulletin No. 412‑89, Breeze‑Eastern ASB BL‑12756‑1‑A25‑01, and ENAC AD 2002‑450 (Requirement/Note).","Administrative insertion duty: mandatory insertion of the technical bulletin and this directive into the Aircraft Flight Manual (Requirement), creating a record-keeping/compliance step for operators.","Safety-critical operational constraint that can impose recurring operational burden until the referenced ASB is complied with (Background/Compliance)."],"plain_english_summary":"**This directive requires immediate inspections and limits on using rescue hoists for Bell AB412 helicopters fitted with Breeze‑Eastern BL‑20200 series hoists that have not incorporated ASB BL‑12756‑1‑A25‑01 Revision A.** Operators must follow Agusta Mandatory Technical Bulletin No. 412‑89 and insert that bulletin and this directive into the Aircraft Flight Manual. It responds to a reported hoist cable fracture caused by a slow‑down feature malfunction and a failed crushable bumper, and keeps interim checks and restrictions in place until the Breeze‑Eastern ASB is complied with."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-412-50-breeze-eastern-rescue-hoist-assembly","history":"/api/acts/ad-bell-412-50-breeze-eastern-rescue-hoist-assembly/history","analysis":"/api/acts/ad-bell-412-50-breeze-eastern-rescue-hoist-assembly/analysis","conflicts":"/api/acts/ad-bell-412-50-breeze-eastern-rescue-hoist-assembly/conflicts","importantCases":"/api/acts/ad-bell-412-50-breeze-eastern-rescue-hoist-assembly/important-cases","documents":"/api/acts/ad-bell-412-50-breeze-eastern-rescue-hoist-assembly/documents"}}