{"id":"F2006B06670","name":"AD/ROTAX/4 - Electronic Module With \"Pi\" Filter","slug":"ad-rotax-4-electronic-module-with-pi-filter","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":48645,"registerId":"commonwealth-F2006B06670-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/ROTAX/4 - Electronic Module With \"Pi\" Filter","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 - 106 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Rotax Piston Engines\n\n \n\nAD/ROTAX/4 Electronic Module With  Filter 2/96\n\nApplicability: This Directive is applicable to all 912A series engines from serial number 4,076.064 to serial number 4,380.753 inclusive.\n\n \n\nRequirement: Replace the electronic ignition module part number 965 356 with part number 965 358 in accordance with Bombardier Rotax Technical Bulletin 912-08 dated 16 August 1995.\n\n \n\nNote: Austro Control (Austria) AD 84 dated 4 October 1995 refers.\n\n \n\nCompliance: At the next 100 hour inspection, but not later than 1 March 1996.\n\n \n\nBackground: Electronic modules with integrated pi filter protect the ignition from electromagnetic interference. EMI tests have revealed that poor engine performance, or engine cut- out, could result in areas of heavy radio transmission.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive with no indication of scope creep. It addresses a specific technical defect in specific engines and mandates a specific remedy. The scope remains tightly confined to the original safety issue identified."},"complexity_factors":["Single, discrete mechanical action required (part replacement)","Narrow applicability (specific engine series and serial number range)","Clear compliance deadline (dual trigger: next inspection OR fixed date)","Only one defined term of note ('pi filter' — explained in background)","No cross-references to other legislation, only a reference to related Austrian authority directive","No conditional logic or nested exceptions","Extremely short document (under 200 words of substantive content)"],"plain_english_summary":"This CASA Airworthiness Directive mandates that owners/operators of Rotax 912A engines (serial nos. 4,076,064–4,380,753) replace the faulty electronic ignition module (p/n 965 356) with the improved, shielded module (p/n 965 358) because EMI from radio transmissions can cause loss of engine power. Comply by the next 100‑hour engine inspection or by 1 March 1996, per the manufacturer’s bulletin."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive explicitly targets a defined subset of Rotax 912A engines by serial number for a single hardware replacement. The text does not indicate an expansion or reduction of that scope from any prior measure within the instrument itself."},"complexity_factors":["Narrow applicability by engine model and explicit serial‑number range increases record‑keeping and inspection planning (Applicability).","Mandatory hardware replacement creates direct compliance action and cost for owners/operators (Requirement).","Fixed compliance deadline tied to maintenance interval (next 100‑hour inspection) or a calendar date adds scheduling constraints (Compliance).","Procedure is specified by an external technical bulletin, creating reliance on an industry document for implementation details (Requirement).","Safety justification relies on EMI testing identifying operational risk, requiring technical understanding to assess urgency (Background).","Cross‑reference to a foreign authority AD (Austro Control) may require coordination for operators using multi‑jurisdictional guidance (Note)."],"plain_english_summary":"This airworthiness directive requires owners/operators of Rotax 912A engines (serial numbers 4,076,064–4,380,753) to replace the electronic ignition module P/N 965 356 with P/N 965 358, following Bombardier Rotax Technical Bulletin 912‑08. Compliance must occur at the next 100‑hour inspection or by 1 March 1996. The stated purpose is to reduce engine performance loss or cut‑out caused by electromagnetic interference (EMI)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-rotax-4-electronic-module-with-pi-filter","history":"/api/acts/ad-rotax-4-electronic-module-with-pi-filter/history","analysis":"/api/acts/ad-rotax-4-electronic-module-with-pi-filter/analysis","conflicts":"/api/acts/ad-rotax-4-electronic-module-with-pi-filter/conflicts","importantCases":"/api/acts/ad-rotax-4-electronic-module-with-pi-filter/important-cases","documents":"/api/acts/ad-rotax-4-electronic-module-with-pi-filter/documents"}}