{"id":"F2006B09352","name":"AD/ECUREUIL/47 Amdt 1 - Electric Hoist Installation","slug":"ad-ecureuil-47-amdt-1-electric-hoist-installation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":53588,"registerId":"commonwealth-F2006B09352-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/ECUREUIL/47 Amdt 1 - Electric Hoist Installation","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nEurocopter AS 350 (Ecureuil) Series Helicopters\n\nAD/ECUREUIL/47\n\nAmdt 1\n\n  \nElectric Hoist Installation 3/92\n\nApplicability: All AS 350 helicopters as specified in the requirement document.\n\nRequirement: 1. Modify the hoist arm in accordance with paragraph 1 C 2 of Aerospatiale Service Bulletin 25-42 Revision 1.\n\n2. Carry out an Electrical Bonding Check in accordance with paragraph 1 C 3 of Aerospatiale Service Bulletin 25-42 Revision 1.\n\nNote 1: Do NOT re-install the pyrotechnic cable cutting squib in accordance with Aerospatiale SB 25-42. AD/SUPP/12 refers.\n\nNote 2: DGAC AD 91-165-058(B) also refers. Note 3: AD/SUPP/13 also refers.\n\nCompliance: Requirement 1. Within 50 hours time in service after 06 March 1992, but no later than 6 June 1992.\n\nRequirement 2. Within 50 hours time in service after 06 March 1992, but no later than 6 June 1992; and on each occasion the hoist or the hoist arm is removed or disassembled.\n\nBackground: An number of inadvertent firings of the pyrotechnic cable cutting device on a variety of helicopter electric hoists resulted in the removal of the pyrotechnic device from all hoists when used for personnel winching pending further investigation (AD/SUPP/12 refers). The pyrotechnic cable cut device is however still required to be fitted to hoists when hoisting cargo.\n\nAD/SUPP/13 requires modification and testing of the bonding between the component parts of the Air Equipment Hoist P/No 76370 (all variants). Compliance with this AD (AD/ECUERUIL/47) will improve the bonding between the hoist and the aircraft, and reduce the likelihood of un-commanded cable cuts when the pyrotechnic device is fitted for cargo winching. Note however that fitment of the pyrotechnic device for personnel winching is still prohibited by AD/SUPP/12 pending further investigation.\n\nAmendment 1 to this AD is issued to revise the applicability statement to include hoist P/No 76370-030.","sortOrder":0}],"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 amendment represents a minor expansion of applicability to include one additional part number (76370-030). The core purpose — mandating safety modifications to prevent inadvertent pyrotechnic device firing — remains unchanged from the original 1992 directive."},"complexity_factors":["Multiple cross-references to other airworthiness directives (AD/SUPP/12 and AD/SUPP/13) and a French aviation authority directive (DGAC AD 91-165-058(B))","Conditional compliance requirements with dual deadlines (flight hours AND calendar date)","Recurring compliance obligation for Requirement 2 (re-check after removal/disassembly)","Distinguishing between personnel winching (prohibited) and cargo winching (permitted with modifications)","Technical references to external manufacturer documents (Aerospatiale Service Bulletin 25-42 Revision 1) that are not reproduced in the text"],"plain_english_summary":"This safety directive orders two mandatory modifications to electric hoists on Eurocopter AS350 helicopters to stop unintended firing of onboard pyrotechnic cable cutters during personnel winching. It affects all operators and maintenance organisations using the specified hoists (now including part 76370-030), prohibits reinstalling the explosive cutter for personnel lifts (allows cargo use after mods), and requires bonding checks when the hoist or arm is disturbed. Mods must be done within 50 flight hours or by 6 June 1992."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"Yes. Amendment 1 revises the AD's applicability to explicitly include hoist P/No 76370-030, thereby expanding the population of AS350 helicopters required to comply. The substantive requirements (hoist-arm modification and bonding checks), deadlines and conditional prohibition on pyrotechnic use for personnel winching remain as originally stated (Amendment 1; Requirement 1–2; Notes; Background)."},"complexity_factors":["Technical modification required to hoist arm (Requirement 1) — requires maintenance/parts and technical competence.","Electrical bonding checks and recurring checks when hoist or hoist arm is removed (Requirement 2) — adds inspection regime and record-keeping.","Short, mandatory compliance window: within 50 hours TIS or by a fixed calendar date (Compliance paragraphs).","Multiple cross-references to external documents (Aerospatiale Service Bulletin 25-42 Rev 1) and other ADs (AD/SUPP/12, AD/SUPP/13, DGAC AD) increasing procedural complexity.","Differentiated operational rule: pyrotechnic device banned for personnel winching but required for cargo winching (Notes / Background) — creates conditional operational constraints.","Amendment changed applicability to include an additional part number (76370-030), enlarging the set of affected operators (Amendment 1).","Financial and logistical burden falls on aircraft owners/operators who must perform or contract the work within the deadline (Requirements/Compliance).","Safety-critical nature elevates regulatory scrutiny and potential operational downtime while modifications and checks are performed (Background)."],"plain_english_summary":"This airworthiness directive requires operators of Eurocopter AS350 helicopters fitted with hoist P/No 76370 (including 76370-030) to modify the hoist arm and carry out an electrical bonding check as set out in Aerospatiale Service Bulletin 25-42 Rev 1. The work must be done within 50 hours time-in-service or by 6 June 1992.\n\nThe stated purpose is to improve electrical bonding and reduce the risk of inadvertent firings of the pyrotechnic cable-cutting device when that device is fitted for cargo winching; the pyrotechnic device remains prohibited for personnel winching under AD/SUPP/12."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ecureuil-47-amdt-1-electric-hoist-installation","history":"/api/acts/ad-ecureuil-47-amdt-1-electric-hoist-installation/history","analysis":"/api/acts/ad-ecureuil-47-amdt-1-electric-hoist-installation/analysis","conflicts":"/api/acts/ad-ecureuil-47-amdt-1-electric-hoist-installation/conflicts","importantCases":"/api/acts/ad-ecureuil-47-amdt-1-electric-hoist-installation/important-cases","documents":"/api/acts/ad-ecureuil-47-amdt-1-electric-hoist-installation/documents"}}