{"id":"F2006B04487","name":"AD/BELL 206/30 - Main Transmission Magnetic Plug - Inspection","slug":"ad-bell-206-30-main-transmission-magnetic-plug-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44324,"registerId":"commonwealth-F2006B04487-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BELL 206/30 - Main Transmission Magnetic Plug - Inspection","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)  Bell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 Series Helicopters\n\n \n\nAD/BELL 206/30 Main Transmission Magnetic Plug - Inspection 2/71\n\nApplicability:  All models with main transmission P/N 206-040-002-5 but not incorporating the five modifications described in Bell 206A-159 and not fitted with cockpit indicating chip detector (SL 206A-133 refers).\n\n \n\nDocument: Bell SB No. 206A-17, Part II.\n\n \n\nNote: Agusta SB No. BT206-46 refers.\n\n \n\nCompliance: At each daily or overnight inspection after 1 December 1970. Background: AD/Agusta 206/21 equivalent.\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1771},"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive retains its original targeted scope requiring routine magnetic plug inspections for specific Bell 206 helicopter transmissions to detect metal contamination indicating impending mechanical failure. It has not expanded beyond this original aviation safety purpose."},"complexity_factors":["Multiple negative exclusion criteria in applicability ('but not incorporating... and not fitted with...')","Dependency on external technical documents (Bell Service Bulletin 206A-17 Part II and Agusta Service Bulletin BT206-46)","Specific part number limitation (P/N 206-040-002-5)","Reference to five unspecified modifications described in separate Bell document 206A-159"],"plain_english_summary":"This AD requires Bell 206/Agusta‑Bell 206 operators to remove and inspect the main transmission magnetic drain plug during every daily or overnight inspection to check for metal debris. It affects helicopters with the specified transmission unless they carry certain Bell-approved modifications or a cockpit chip detector. The measure aims to detect internal wear early and prevent catastrophic transmission failure and likely loss of rotor drive."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-206-30-main-transmission-magnetic-plug-inspection","history":"/api/acts/ad-bell-206-30-main-transmission-magnetic-plug-inspection/history","analysis":"/api/acts/ad-bell-206-30-main-transmission-magnetic-plug-inspection/analysis","conflicts":"/api/acts/ad-bell-206-30-main-transmission-magnetic-plug-inspection/conflicts","importantCases":"/api/acts/ad-bell-206-30-main-transmission-magnetic-plug-inspection/important-cases","documents":"/api/acts/ad-bell-206-30-main-transmission-magnetic-plug-inspection/documents"}}