{"id":"F2006B02484","name":"AD/AS 355/30 - Cargo Hook Emergency Manual Control","slug":"ad-as-355-30-cargo-hook-emergency-manual-control","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41740,"registerId":"commonwealth-F2006B02484-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AS 355/30 - Cargo Hook Emergency Manual Control","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Eurocopter AS 355 (Twin Ecureuil) Series Helicopters\n\n \n\nAD/AS 355/30 Cargo Hook Emergency Manual Control 12/87\n\nApplicability: All AS 355 helicopters with cargo hooks fitted with SIREN S1609-5 release unit P/N 704A41-811-017.\n\n \n\nRequirement: Action in accordance with Aerospatiale SB 25.22. Compliance: Hook assy to be modified by 31 January 1988.\n\nBackground:  A spring unit has been added to this cargo hook electrical release to prevent inadvertent hook operation.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1262},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope addressing a specific mechanical defect in a specific helicopter cargo hook model. It has not expanded beyond the original safety issue of preventing inadvertent cargo hook release."},"complexity_factors":["Single, unambiguous requirement with no exceptions","No defined terms or interpretation sections","No nested conditional logic","Extremely short length (under 150 words)","Direct reference to single external technical standard (Service Bulletin 25.22) for implementation details"],"plain_english_summary":"**What this does**\n\nThis Airworthiness Directive mandates a safety fix for specific helicopter cargo hooks. It requires operators to install a spring unit on the electrical release mechanism of certain cargo hooks to stop them from opening accidentally.\n\n**Who is affected**\n\nOwners and operators of **Eurocopter AS 355 (Twin Ecureuil) helicopters** that are fitted with a cargo hook using the **SIREN S1609-5 release unit** (part number 704A41-811-017).\n\n**What must be done**\n\nThe cargo hook assembly must be modified according to the manufacturer's technical instructions (Aerospatiale Service Bulletin 25.22). This involves fitting a spring unit to the electrical release system.\n\n**Why this matters**\n\nWithout this modification, the cargo hook could inadvertently open during flight, causing suspended loads to drop unexpectedly. This creates a significant safety risk to people and property on the ground, as well as to the aircraft itself if the sudden weight shift affects flight stability."}},"importantCases":[],"_links":{"self":"/api/acts/ad-as-355-30-cargo-hook-emergency-manual-control","history":"/api/acts/ad-as-355-30-cargo-hook-emergency-manual-control/history","analysis":"/api/acts/ad-as-355-30-cargo-hook-emergency-manual-control/analysis","conflicts":"/api/acts/ad-as-355-30-cargo-hook-emergency-manual-control/conflicts","importantCases":"/api/acts/ad-as-355-30-cargo-hook-emergency-manual-control/important-cases","documents":"/api/acts/ad-as-355-30-cargo-hook-emergency-manual-control/documents"}}