{"id":"F2006B04453","name":"AD/BELL 206/139 - Main Rotor Blades Part Number 206-010-200-33","slug":"ad-bell-206-139-main-rotor-blades-part-number-206-010-200-33","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44290,"registerId":"commonwealth-F2006B04453-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BELL 206/139 - Main Rotor Blades Part Number 206-010-200-33","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nBell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 Series Helicopters\n\nAD/BELL 206/139 Main Rotor Blades Part Number\n\n206-010-200-33\n\n  \n11/98\n\nTX\n\nApplicability: All Agusta-Bell AB.206A and AB.206B helicopters equipped with main rotor blades part number 206-010-200-33 with a serial number in the range M3-1501 through M3- 2057 and EM-0001 through EM-0154.\n\nRequirement: Inspect in accordance with Agusta Bollettino Tecnico 206-229, dated 13 July 1998.\n\nNote: RAI AD 98-257 refers.\n\nCompliance: Unless the Part I inspection is already accomplished, before further flight after 7 August 1998, and thereafter at intervals not to exceed 10 hours time in service until Part II compliance. Before 30 November 1998 for the Part II inspection, and thereafter as specified in the Requirement document for the Part III inspection.\n\nThis airworthiness directive becomes effective on 7 August 1998.\n\nBackground: A report was received of the presence of scratches inside the spar of a main rotor blade between STA 2185 and STA 2855, on a time expired blade that had been removed from service. This Directive requires certain NDI inspections on the upper and lower sides of an affected main rotor blade.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard airworthiness directive with a narrow, specific scope addressing a particular safety defect in specific helicopter blades. It has not expanded beyond its original purpose of mandating inspections for scratch defects in these specific rotor blades."},"complexity_factors":["Single, specific applicability (one helicopter model series, one part number, defined serial number ranges)","Clear three-part compliance structure with specific deadlines","Only one technical reference document (Agusta Bollettino Tecnico 206-229)","No defined terms section or interpretation provisions","No cross-references to other legislation beyond a note about a related foreign directive","Straightforward conditional logic (if not already done, do before flying)"],"plain_english_summary":"This CASA safety order mandates urgent inspections of main rotor blades (P/N 206-010-200-33, S/N M3‑1501–M3‑2057 and EM‑0001–EM‑0154) on Agusta‑Bell AB.206A/B helicopters after internal scratches were found that could weaken blades and risk in‑flight failure. Operators must complete the required inspections per the directive (effective 7 Aug 1998) and meet the specified compliance deadline (Part II by 30 Nov 1998) to maintain airworthiness."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"Scope is limited to the specified AB.206A/B models fitted with rotor blades P/N 206-010-200-33 within the listed serial-number ranges and to inspection requirements per the cited service bulletin. The directive imposes identification and inspection obligations but does not broaden applicability beyond those identified blades."},"complexity_factors":["Targeted applicability by helicopter model and narrow blade serial-number ranges (Applicability).","Mandated non‑destructive inspection (NDI) procedures that rely on an external service document (Requirement: Agusta Bollettino Tecnico 206-229).","Staged compliance timetable: immediate pre-flight inspection, repeated short (≤10 hour) intervals until Part II, then a Part II deadline and further Part III requirements (Compliance).","Safety-critical nature imposes operational interruptions and inspection costs on operators (Compliance & Background).","Reference to earlier AD/RAI documents may require cross-checking related directives (Note)."],"plain_english_summary":"This directive orders owners/operators of certain Agusta-Bell 206A/B helicopters fitted with main rotor blades P/N 206-010-200-33 (specified serial-number ranges) to perform non‑destructive inspections following Agusta Bollettino Tecnico 206-229 (13 July 1998). It responds to a reported internal spar scratch on a removed blade. Inspections are required before further flight after 7 August 1998, repeated at intervals not exceeding 10 flight hours until the next-stage inspection (required by 30 November 1998), with subsequent checks as the service document specifies."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-206-139-main-rotor-blades-part-number-206-010-200-33","history":"/api/acts/ad-bell-206-139-main-rotor-blades-part-number-206-010-200-33/history","analysis":"/api/acts/ad-bell-206-139-main-rotor-blades-part-number-206-010-200-33/analysis","conflicts":"/api/acts/ad-bell-206-139-main-rotor-blades-part-number-206-010-200-33/conflicts","importantCases":"/api/acts/ad-bell-206-139-main-rotor-blades-part-number-206-010-200-33/important-cases","documents":"/api/acts/ad-bell-206-139-main-rotor-blades-part-number-206-010-200-33/documents"}}