{"id":"F2006B04549","name":"AD/BELL 212/16 - Cyclic SCAS Stops Installation - Modification","slug":"ad-bell-212-16-cyclic-scas-stops-installation-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114277,"registerId":"commonwealth-F2006B04549-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BELL 212/16 - Cyclic SCAS Stops Installation - Modification","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\nBell Helicopter Textron 212 Series Helicopters\n\n \n\nAD/BELL 212/16 Cyclic SCAS Stops Installation - Modification 3/77\n\nApplicability: All models prior to aircraft S/N 30850 that comply with service instructions 212-19, 212-47 and 212-53.\n\n \n\nDocument: Bell SB No. 212-77-3.\n\n \n\nCompliance: Within 100 hours time in service after 31 March 1977.\n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":3078},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains a narrow scope focused solely on the SCAS stops modification for specific Bell 212 aircraft, without expanding to additional helicopter models or systems."},"complexity_factors":["Conditional applicability based on aircraft serial number and prior modification history","Requires reference to external technical documents (Bell Service Bulletin 212-77-3) for implementation details","Aviation-specific terminology (SCAS, cyclic stick, time in service)","Single, clear compliance action with straightforward deadline"],"plain_english_summary":"This mandatory safety order requires operators of certain Bell 212 helicopters to modify the **cyclic stick control augmentation system (SCAS) stops** — a safety feature that limits how far the pilot's main control stick can move.\n\n**Who it affects:** Owners and operators of Bell 212 helicopters with serial numbers below 30850, but only if those aircraft have already been modified according to three specific service instructions (212-19, 212-47, and 212-53).\n\n**What must be done:** Install new stops on the cyclic control system following the technical instructions in Bell Service Bulletin No. 212-77-3.\n\n**When:** The work must be completed within 100 hours of flight time after 31 March 1977.\n\n**Why it matters:** This ensures the helicopter's flight control stops function correctly to prevent potential loss of control during flight."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-212-16-cyclic-scas-stops-installation-modification","history":"/api/acts/ad-bell-212-16-cyclic-scas-stops-installation-modification/history","analysis":"/api/acts/ad-bell-212-16-cyclic-scas-stops-installation-modification/analysis","conflicts":"/api/acts/ad-bell-212-16-cyclic-scas-stops-installation-modification/conflicts","importantCases":"/api/acts/ad-bell-212-16-cyclic-scas-stops-installation-modification/important-cases","documents":"/api/acts/ad-bell-212-16-cyclic-scas-stops-installation-modification/documents"}}