{"id":"F2006B07149","name":"AD/SUPP/4 - Air Equipment Rescue Hoist - Inspection and Modification of Squib","slug":"ad-supp-4-air-equipment-rescue-hoist-inspection-and-modification-of-squib","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":49001,"registerId":"commonwealth-F2006B07149-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SUPP/4 - Air Equipment Rescue Hoist - Inspection and Modification of Squib","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 107 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nSupplementary Equipment\n\nAD/SUPP/4 Air Equipment Rescue Hoist \\- Inspection\n\nand Modification of Squib\n\n  \n10/82\n\nApplicability: Air Equipment Rescue Hoists P/Nos. 76370, 76370-010, 76370-020 and 76375.\n\nNote: These hoists may be installed on (but not limited to) the following helicopters:- Aerospatiale SA 341, SA 342, 3160, 316, 319, AS350, AS 355, SA 360C, SA 365C and SA 365N.\n\nRequirement: 1. Inspect and modify hoists P/Nos. 76370, 76370-010 and 76370-020 in accordance with Air Equipment Service Bulletin 25-62-0C Rev. 1 or later approved revisions.\n\n    2. Inspect and modify hoist P/No. 76375 in accordance with Air Equipment Service Bulletin 25-69-0B Rev. 1 or later approved revisions.\n\n    3. For hoists not modified in accordance with paras. 1 and 2 provide a hand cable cutter capable of ensuring a positive quick cable cut.\n\nCompliance: For Paras. 1 and 2 \\- Before 1 October 1982\\. For Para. 3 - Before operation of the hoist.\n\nBackground: There have been several reported overseas defects which could cause the pyrotechnical shearing device to become inoperative.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive addressing a specific mechanical defect in specific equipment. It has not expanded beyond its original purpose of ensuring rescue hoist cable cutter reliability."},"complexity_factors":["Very short document (under 300 words)","Only 4 specific part numbers in scope","Simple conditional structure: modify OR carry backup cutter","Single compliance deadline with one exception","No defined terms section","No cross-references to other legislation beyond the enabling regulations (CAR 1998 Part 39)","Clear, imperative language throughout"],"plain_english_summary":"This CASA Airworthiness Directive orders operators of certain Air Equipment rescue hoists (part numbers 76370, 76370-010, 76370-020, 76375) — commonly fitted to Aerospatiale helicopters — to inspect and modify the pyrotechnic cable cutter per the manufacturer’s service bulletins by 1 October 1982, or carry a hand cable cutter as an emergency backup.  \n\nIt responds to reported defects that could prevent explosive cutters from severing stuck cables, risking crew safety during rescues."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive maintains the original, targeted scope: it applies to the listed hoist part numbers and requires inspection/modification per specified Service Bulletins or provision of a hand cable cutter if not modified. It sets compliance deadlines and cites reported defects as the reason; it does not expand or narrow applicability beyond the listed P/Ns."},"complexity_factors":["Limited technical scope: targets specific hoist part numbers (P/Ns 76370, 76370-010, 76370-020, 76375).","Dependency on external documents: compliance requires work 'in accordance with' Air Equipment Service Bulletins and later approved revisions (paras. 1–2).","Two compliance paths: mandated modification or, alternatively, carrying a hand cable cutter if unmodified (para. 3) — creates operational choice and tracking burden.","Strict deadlines: modifications required before a fixed calendar date; cutter required before operation — calendar and operational compliance checks.","Safety-critical maintenance: inspections/modifications to pyrotechnic components increase technical/approval burden on maintenance organisations.","Applicability across multiple helicopter types (note), which affects fleet managers and logistics even if hoists are identical."],"plain_english_summary":"This airworthiness directive obliges operators of specific Air Equipment Rescue Hoists (P/N 76370, 76370-010, 76370-020 and 76375) to inspect and modify the pyrotechnical shearing device (squib) following the manufacturer’s Service Bulletins, or—if not modified—carry a hand cable cutter that ensures a positive quick cable cut (Requirements 1–3). It responds to reported defects that could render the squib inoperative and imposes fixed deadlines: the modifications before 1 October 1982 and the cutter before using the hoist."}},"importantCases":[],"_links":{"self":"/api/acts/ad-supp-4-air-equipment-rescue-hoist-inspection-and-modification-of-squib","history":"/api/acts/ad-supp-4-air-equipment-rescue-hoist-inspection-and-modification-of-squib/history","analysis":"/api/acts/ad-supp-4-air-equipment-rescue-hoist-inspection-and-modification-of-squib/analysis","conflicts":"/api/acts/ad-supp-4-air-equipment-rescue-hoist-inspection-and-modification-of-squib/conflicts","importantCases":"/api/acts/ad-supp-4-air-equipment-rescue-hoist-inspection-and-modification-of-squib/important-cases","documents":"/api/acts/ad-supp-4-air-equipment-rescue-hoist-inspection-and-modification-of-squib/documents"}}