{"id":"F2006B04383","name":"AD/BELL 205/47 - Hydraulic Servo Cylinder Assembly - Spanner Link Assembly Inspection and Rework","slug":"ad-bell-205-47-hydraulic-servo-cylinder-assembly-spanner-link-assembly-inspection-and-rework","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44208,"registerId":"commonwealth-F2006B04383-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BELL 205/47 - Hydraulic Servo Cylinder Assembly - Spanner Link Assembly Inspection and Rework","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-description: CASA Airworthiness Directive\nmeta-generator: Aspose.Words for .NET 22.10.0\nmeta-keywords: Issue 1/1980,Rotorcraft,Bell Helicopter Textron 205 Series Helicopters,Hydraulic Servo Cylinder Assembly - Spanner Link Assembly Inspection and Rework,47\ntitle: Airworthiness Directive - AD/BELL 205/47 - Hydraulic Servo Cylinder Assembly - Spanner Link Assembly Inspection and Rework\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\nBell Helicopter Textron 205 Series Helicopters\n\n \n\n# AD/BELL 205/47 Hydraulic Servo Cylinder Assembly - Spanner\n\nLink Assembly Inspection and Rework\n\nApplicability: Model 205A-1 with S/Nos. 30128 to 30287, and 30289 to 30296. Document:  Bell Alert SB No. 205-79-11.\n\nCompliance: Within 100 hours time in service after 31 January 1980.\n\n# 1/80\n\n \n\nBackground: The redundant feature of the dual hydraulic servo system could be adversely affected by interference to the spanner link assembly.\n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1361},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original targeted scope addressing a specific mechanical interference defect in identified helicopter models. No evidence of scope creep or expansion beyond the original hydraulic system safety concern."},"complexity_factors":["Narrow applicability limited to specific aircraft serial number ranges","Single compliance action required (inspection and rework)","Absolute compliance deadline (100 hours time in service after fixed date)","Clear reference to external technical standard (Bell Service Bulletin)"],"plain_english_summary":"This safety directive requires owners and operators of specific Bell 205A-1 helicopters to inspect and repair a critical component in the hydraulic system.\n\n**Who is affected**: Only helicopters with serial numbers 30128–30287 and 30289–30296.\n\n**What must be done**: Inspect and rework the **spanner link assembly** in the hydraulic servo cylinder, following the technical instructions in Bell Alert Service Bulletin No. 205-79-11.\n\n**Deadline**: Within 100 hours of flight time after 31 January 1980.\n\n**Why this matters**: These helicopters have a backup hydraulic system (called a *redundant* system) for safety. If the spanner link assembly interferes with this system, both the primary and backup systems could fail, potentially causing loss of control during flight."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-205-47-hydraulic-servo-cylinder-assembly-spanner-link-assembly-inspection-and-rework","history":"/api/acts/ad-bell-205-47-hydraulic-servo-cylinder-assembly-spanner-link-assembly-inspection-and-rework/history","analysis":"/api/acts/ad-bell-205-47-hydraulic-servo-cylinder-assembly-spanner-link-assembly-inspection-and-rework/analysis","conflicts":"/api/acts/ad-bell-205-47-hydraulic-servo-cylinder-assembly-spanner-link-assembly-inspection-and-rework/conflicts","importantCases":"/api/acts/ad-bell-205-47-hydraulic-servo-cylinder-assembly-spanner-link-assembly-inspection-and-rework/important-cases","documents":"/api/acts/ad-bell-205-47-hydraulic-servo-cylinder-assembly-spanner-link-assembly-inspection-and-rework/documents"}}