{"id":"F2006B04504","name":"AD/BELL 206/49 - Hydraulic Servo Actuator Servo Valve Drive Locknut - Inspection","slug":"ad-bell-206-49-hydraulic-servo-actuator-servo-valve-drive-locknut-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114202,"registerId":"commonwealth-F2006B04504-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BELL 206/49 - Hydraulic Servo Actuator Servo Valve Drive Locknut - 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 206/49 Hydraulic Servo Actuator Servo Valve\n\nDrive Locknut - Inspection\n\n\n6/73\n\n \n\nApplicability: All models.\n\n \n\nDocument: Bell SB No. 206-06-73-2.\n\n \n\nNote: Agusta SB No. BT206-61 refers.\n\n \n\nCompliance: At next daily or overnight inspection after 24 May 1973. Background: AD/Agusta 206/35 equivalent.\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1920},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope: mandating a specific safety inspection on the hydraulic servo actuator of Bell 206 helicopters. There is no indication of scope creep or expansion beyond this original mechanical safety purpose."},"complexity_factors":["Single, discrete maintenance action required","Very short document length with minimal conditional logic","Relies on external technical documents (Service Bulletins) for detailed inspection procedures rather than incorporating them into the directive text","Specific technical terminology requiring aviation engineering knowledge to interpret fully"],"plain_english_summary":"**What this requires:** This Airworthiness Directive mandates an inspection of the drive locknut on the hydraulic servo actuator's servo valve for all Bell 206 series helicopters.\n\n**Who must comply:** Owners and operators of Bell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 series helicopters (all models).\n\n**Action required:** Inspect the drive locknut at the next scheduled daily or overnight maintenance inspection. The specific technical procedures are detailed in Bell Service Bulletin No. 206-06-73-2 (and Agusta SB No. BT206-61 where applicable).\n\n**Why it exists:** This safety directive prevents potential failures in the helicopter's hydraulic flight control system that could compromise airworthiness."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-206-49-hydraulic-servo-actuator-servo-valve-drive-locknut-inspection","history":"/api/acts/ad-bell-206-49-hydraulic-servo-actuator-servo-valve-drive-locknut-inspection/history","analysis":"/api/acts/ad-bell-206-49-hydraulic-servo-actuator-servo-valve-drive-locknut-inspection/analysis","conflicts":"/api/acts/ad-bell-206-49-hydraulic-servo-actuator-servo-valve-drive-locknut-inspection/conflicts","importantCases":"/api/acts/ad-bell-206-49-hydraulic-servo-actuator-servo-valve-drive-locknut-inspection/important-cases","documents":"/api/acts/ad-bell-206-49-hydraulic-servo-actuator-servo-valve-drive-locknut-inspection/documents"}}