{"id":"F2008L02897","name":"AD/BELL 412/56 - Rescue Hoist Cable Assembly","slug":"ad-bell-412-56-rescue-hoist-cable-assembly","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74799,"registerId":"commonwealth-F2008L02897-current","compilationNumber":null,"startDate":"2026-04-02","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 412/56 | Rescue Hoist Cable Assembly | 10/2008 TX |\n| -------------- | --------------------------- | ---------- |\n\n| Applicability: | Model AB 412 and AB 412EP helicopters, all serial numbers, that have internal hoist part number 214-070-300-1 (Goodrich part number 42277-1) or external hoist part number BL-10300-60 (Breeze Eastern) or part number BL-20200-SERIES (Breeze Eastern), installed.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |\n| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. Identify the affected rescue hoist cable assemblies and determine the accumulated number of “hoist cycles” for each unit, in accordance with the instructions of Agusta Alert Technical Bulletin 412-126 dated 28 July 2008, or later EASA approved revision, and replace any units that have reached or exceeded the new retirement life limit.2. Amend the approved aircraft maintenance programme to incorporate the new life limit, in accordance with Chapter 4 of Agusta Maintenance Manual AB412-MM Revision 6, dated 27 June 2008.3. Thereafter, within the thresholds and intervals indicated in Chapter 4 of Agusta Maintenance Manual AB412-MM Revision 6, dated 27 June 2008, replace each rescue hoist cable assembly with a serviceable unit.If it is not possible to determine the “hoist cycles” and/or date of hoist cable assembly installation, as required by Requirement 1, not later than 31 October 2008, replace the hoist cable assembly with a serviceable unit.Note: EASA Emergency AD 2008-0142-E refers. |\n| Compliance:    | 1. Before further flight after 1 August 2008.2. Within 30 days after 1 August 2008.3. As specified in Requirement 3.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |\n|                | This Airworthiness Directive becomes effective on 1 August 2008.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |\n\n| Background: | Agusta has recently published Revision 6 for Chapter 4 of the AB412 Maintenance Manual to introduce a retirement life limit for the cables installed on certain hoists. In addition, Agusta has introduced the concept of “hoist lift” to be used for the determination of cable life, instead of the term “hoist cycle”. The newly established retirement life is 1,500 accumulated hoist lifts or 4 years, whichever occurs first. |\n| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n31 July 2008","sortOrder":0},{"sectionNumber":"AD/BELL 412/56","sectionType":"part","heading":"AD/BELL 412/56","content":"## AD/BELL 412/56","sortOrder":1},{"sectionNumber":"Rescue Hoist Cable Assembly","sectionType":"part","heading":"Rescue Hoist Cable Assembly","content":"## Rescue Hoist Cable Assembly","sortOrder":2},{"sectionNumber":"10/2008 TX","sectionType":"part","heading":"10/2008 TX","content":"## 10/2008 TX","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a targeted safety directive addressing a specific mechanical component (rescue hoist cables) on specific helicopter models. The scope remains tightly focused on its original purpose: preventing cable failure in rescue operations. No scope creep is evident."},"complexity_factors":["Short, single-purpose directive with only 3 main requirements","Clear applicability table specifying exact helicopter models and part numbers","Straightforward compliance dates (immediate, 30 days, or as specified)","Single cross-reference to European aviation safety document (EASA Emergency AD 2008-0142-E)","One conditional exception (unknown usage history triggers mandatory replacement)","Minimal defined terms — only \"hoist cycles\" and \"hoist lifts\" require explanation, both clarified in the Background section"],"plain_english_summary":"This AD requires operators of Bell 412/412EP helicopters with Goodrich or Breeze Eastern rescue hoists to retire hoist cables at 1,500 lifts or 4 years, whichever comes first. Operators must count hoist cycles per the manufacturer, immediately replace any cable at or beyond the limit, and update maintenance records.\n\nNo flight allowed after 1 Aug 2008 until cables are checked/replaced; if usage history cannot be established by 31 Oct 2008, cables must be replaced as a precaution."},"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":true,"description":"The directive changes scope by introducing a new mandatory retirement life for certain rescue hoist cables (1,500 hoist lifts or 4 years) and by requiring amendment of the approved maintenance programme to reflect that life limit (Background; Requirement 2). Previously there was no such retirement life recorded in the referenced manual; the AD therefore expands regulatory obligations on operators and maintenance organisations. The immediate replacement requirement for items with unknown history (Requirement 1) shifts replacement costs and operational burden onto operators unless accurate historical records exist."},"complexity_factors":["Applicability covers multiple helicopter models and several hoist part numbers, widening the population of affected units (Applicability).","Operators must determine accumulated \"hoist lifts\" for each unit, requiring accurate operational records and possibly retroactive verification (Requirement 1).","If hoist cycles/lift history cannot be determined, units must be replaced by a fixed deadline (Requirement 1), creating a binary compliance cost for uncertain records.","Mandated amendment of the approved maintenance programme to incorporate the new life limit ties continuing airworthiness to a specific manual chapter (Requirement 2; Chapter 4 of AB412-MM Rev 6).","Ongoing replacements must follow thresholds and intervals set in an external maintenance manual, creating dependence on that document for scheduling (Requirement 3).","Short initial compliance windows (before further flight after 1 Aug 2008; within 30 days after 1 Aug 2008) increase operational disruption and administrative urgency (Compliance).","The AD relies on external technical publications (Agusta Alert Technical Bulletin and Agusta Maintenance Manual) and references an EASA Emergency AD, requiring operators to obtain and interpret multiple documents (Requirement 1; Requirement 2; Note; Background).","Terminology change from \"hoist cycle\" to \"hoist lift\" may require reconciliation of historical records and definitions, risking inconsistent application (Background)."],"plain_english_summary":"This Airworthiness Directive requires operators of Bell AB412 and AB412EP helicopters fitted with specified internal or external rescue hoists to record accumulated \"hoist lifts\" and retire cable assemblies at 1,500 lifts or 4 years, update the approved maintenance program, and replace any hoist with unknown history by 31 October 2008. It affects helicopter operators and maintenance organisations because it imposes record‑keeping, scheduled replacements and program amendments to manage hoist cable retirement."},"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-412-56-rescue-hoist-cable-assembly","history":"/api/acts/ad-bell-412-56-rescue-hoist-cable-assembly/history","analysis":"/api/acts/ad-bell-412-56-rescue-hoist-cable-assembly/analysis","conflicts":"/api/acts/ad-bell-412-56-rescue-hoist-cable-assembly/conflicts","importantCases":"/api/acts/ad-bell-412-56-rescue-hoist-cable-assembly/important-cases","documents":"/api/acts/ad-bell-412-56-rescue-hoist-cable-assembly/documents"}}