{"id":"F2006B06718","name":"AD/S-76/37 - Engine Fire Extinguisher Harness - Modification","slug":"ad-s-76-37-engine-fire-extinguisher-harness-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114537,"registerId":"commonwealth-F2006B06718-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/S-76/37 - Engine Fire Extinguisher Harness - Modification","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)  Sikorsky S-76 Series Helicopters\n\n \n\nAD/S-76/37 Engine Fire Extinguisher Harness - Modification 4/85 Applicability:  All model S-76A fitted with fire extinguisher harness P/Nos 76552-10128-041/042. Requirement:  Sikorsky Alert Service Bulletin No. 76-26-1.\n\nCompliance:   Within 100 hours time in service after 30 April 1985.\n\n \n\nBackground: System redundancy is improved by wiring the dual fire extinguisher primers in parallel.\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\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1523},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This is a targeted, narrow safety directive addressing a specific technical modification to fire suppression systems on identified aircraft. There is no evidence of scope creep beyond the original safety purpose."},"complexity_factors":["Single, unambiguous requirement with no subsections","No defined terms or interpretation section","Clear applicability limited to specific aircraft model and two part numbers","Simple compliance deadline formula (100 hours after fixed date)","No conditional exceptions, cross-references, or nested logic"],"plain_english_summary":"This mandatory Airworthiness Directive applies to Sikorsky S‑76A helicopters fitted with fire‑extinguisher harness P/N 76552‑10128‑041 or ‑042. It requires rewiring the two engine fire‑extinguisher primers in parallel per Sikorsky Alert Service Bulletin 76‑26‑1 to ensure one primer can still actuate the extinguisher if the other fails. The change increases redundancy and must be completed within 100 flight hours after April 30, 1985."}},"importantCases":[],"_links":{"self":"/api/acts/ad-s-76-37-engine-fire-extinguisher-harness-modification","history":"/api/acts/ad-s-76-37-engine-fire-extinguisher-harness-modification/history","analysis":"/api/acts/ad-s-76-37-engine-fire-extinguisher-harness-modification/analysis","conflicts":"/api/acts/ad-s-76-37-engine-fire-extinguisher-harness-modification/conflicts","importantCases":"/api/acts/ad-s-76-37-engine-fire-extinguisher-harness-modification/important-cases","documents":"/api/acts/ad-s-76-37-engine-fire-extinguisher-harness-modification/documents"}}