{"id":"F2006B04503","name":"AD/BELL 206/47 Amdt 1 - Hydraulic Servo Actuator Piston P/N 41000005 - Inspection and Replacement","slug":"ad-bell-206-47-amdt-1-hydraulic-servo-actuator-piston-p-n-41000005-inspection-and-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114200,"registerId":"commonwealth-F2006B04503-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BELL 206/47 Amdt 1 - Hydraulic Servo Actuator Piston P/N 41000005 - Inspection and Replacement","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 206/47\n\nAmdt 1\n\n  \nHydraulic Servo Actuator Piston\n\nP/N 41000005 \\- Inspection and Replacement\n\n  \n8/73\n\nApplicability: All models equipped with Servo actuators P/N 206-076- 031-5 (41103730) S/N 8383\n\nor 9318 and 206-076-031-7 (41000670) S/N 1422 to 1673.\n\nDocument: Bell SB No. 206-06-73-1 Rev. A.\n\nCompliance: For Part 1 of SB 206-06-73-1 Rev. A: At the next daily or overnight inspection after 9 May 1973 and thereafter at intervals not exceeding 100 hours time in service until affected servo actuators are replaced or reworked.\n\nFor Part 2 of SB 206-06-73-1 Rev. A: At each daily or overnight inspection after 9 May 1973 until affected servo actuators are replaced or reworked.\n\nBackground: AD/Agusta 206/34A equivalent.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2727},"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"As Amendment 1 to the original directive, this maintains the targeted scope focused on specific hydraulic servo actuator pistons in Bell 206 helicopters. The applicability remains limited to the particular part numbers and serial number ranges identified in the original directive, consistent with the original safety intent."},"complexity_factors":["Requires cross-referencing to external technical document (Bell Service Bulletin No. 206-06-73-1 Rev. A) for complete inspection procedures","Applicability determined by specific part numbers and narrow serial number ranges","Dual compliance pathways (Part 1 and Part 2) with different inspection intervals","Technical aviation terminology requires specialized knowledge to identify affected components"],"plain_english_summary":"This Airworthiness Directive requires owners/operators of Bell 206 helicopters with specific hydraulic servo actuators (piston PN 41000005: PN 206-076-031-5, SN 8383 or 9318; PN 206-076-031-7, SN 1422–1673) to follow Bell Service Bulletin 206-06-73-1 Rev. A. It mandates initial and ongoing piston inspections (daily/overnight checks and periodic 100‑hour checks per the bulletin) until the actuator is repaired or replaced.\n\nThe action prevents piston failure that could lead to loss of flight control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-206-47-amdt-1-hydraulic-servo-actuator-piston-p-n-41000005-inspection-and-replacement","history":"/api/acts/ad-bell-206-47-amdt-1-hydraulic-servo-actuator-piston-p-n-41000005-inspection-and-replacement/history","analysis":"/api/acts/ad-bell-206-47-amdt-1-hydraulic-servo-actuator-piston-p-n-41000005-inspection-and-replacement/analysis","conflicts":"/api/acts/ad-bell-206-47-amdt-1-hydraulic-servo-actuator-piston-p-n-41000005-inspection-and-replacement/conflicts","importantCases":"/api/acts/ad-bell-206-47-amdt-1-hydraulic-servo-actuator-piston-p-n-41000005-inspection-and-replacement/important-cases","documents":"/api/acts/ad-bell-206-47-amdt-1-hydraulic-servo-actuator-piston-p-n-41000005-inspection-and-replacement/documents"}}