{"id":"F2006B04493","name":"AD/BELL 206/38 - Main Rotor Mast - Inspection","slug":"ad-bell-206-38-main-rotor-mast-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114187,"registerId":"commonwealth-F2006B04493-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BELL 206/38 - Main Rotor Mast - 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 206/38 Main Rotor Mast - Inspection 12/72\n\nApplicability: All models with S/Nos. 4 to 857 and all spares shipped from Bell prior to 8 September 1972.\n\n \n\nDocument: Bell SB No. 206-23.\n\n \n\nCompliance: For Part 1 of SB No. 206-23 - within 25 hours time in service after 28 November 1972.\n\n \n\nFor Part II of SB No. 206-23 - before 28 December 1972.\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1666},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive maintains its original narrow technical scope: mandating a specific safety inspection on specific helicopter models to address a defined manufacturing or maintenance issue. It has not expanded beyond its original purpose of ensuring main rotor mast integrity."},"complexity_factors":["Very short text (under 150 words) with single technical requirement","Clear applicability criteria limited to specific serial number range and shipment dates","Simple two-part compliance structure with specific deadlines","Relies on external technical document (Service Bulletin 206-23) for actual inspection procedures","No nested exceptions, definitions, or cross-references to other legislative provisions"],"plain_english_summary":"This Airworthiness Directive requires owners/operators of specified Bell/Agusta Bell 206 helicopters (serials 4–857 and any spare rotor masts shipped before 8 Sept 1972) to inspect the main rotor mast per Bell Service Bulletin No. 206‑23. Inspections must be completed on the timetable in the bulletin. It’s mandatory because mast defects could cause catastrophic failure; aircraft not inspected as required are unairworthy and may not fly."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-206-38-main-rotor-mast-inspection","history":"/api/acts/ad-bell-206-38-main-rotor-mast-inspection/history","analysis":"/api/acts/ad-bell-206-38-main-rotor-mast-inspection/analysis","conflicts":"/api/acts/ad-bell-206-38-main-rotor-mast-inspection/conflicts","importantCases":"/api/acts/ad-bell-206-38-main-rotor-mast-inspection/important-cases","documents":"/api/acts/ad-bell-206-38-main-rotor-mast-inspection/documents"}}