{"id":"F2006B07157","name":"AD/SWSA226/10 - Engine Windmilling Limits Placard - Installation","slug":"ad-swsa226-10-engine-windmilling-limits-placard-installation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":49025,"registerId":"commonwealth-F2006B07157-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SWSA226/10 - Engine Windmilling Limits Placard - Installation","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)  Fairchild (Swearingen) SA226 and SA227 Series Aeroplanes\n\n \n\nAD/SWSA226/10 Engine Windmilling Limits Placard - Installation\n\n\n7/73\n\n \n\nApplicability: Model 226T.\n\n \n\nRequirement: Install the following placard on the main instrument panel adjacent to the Fuel Consumption Totalizer.\n\n \n\nWINDMILLING RPM OPERATING LIMITS\n\n \n\n28% to 100% One minute maximum.\n\n \n\n18% to 28% Do not allow engine to wind-mill in this RPM range. WINDMILLING RPM              OPERATING LIMITS\n\n10% to 18% 5 minute maximum.\n\n \n\n5% to 10% 30 minute maximum.\n\n \n\n0% to 5% No limit.\n\n \n\nCompliance: Within 10 hours time in service after 5 July 1973.\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":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1713},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This directive maintains its original narrow scope—mandating a specific safety placard for a specific aircraft model to prevent engine damage during windmilling operations. No expansion beyond this technical safety requirement is evident."},"complexity_factors":["Single, unambiguous mechanical requirement with no conditional branches","No defined terms or interpretation section","Zero cross-references to other legislation","Binary applicability test (only applies to Model 226T aircraft)","Simple linear compliance deadline (single date, no phased implementation)"],"plain_english_summary":"This rule requires owners of specific Fairchild Swearingen aircraft (Model 226T) to install a warning label on the main dashboard near the fuel gauge.\n\nThe label warns pilots about **engine windmilling**—when an engine spins without producing power (like a propeller turning in the wind while the engine is shut down). Staying in certain rotation speeds for too long can damage the engine.\n\nThe label must display these time limits:\n- **28% to 100%** RPM: Maximum 1 minute\n- **18% to 28%**: Never operate in this range (danger zone)\n- **10% to 18%**: Maximum 5 minutes  \n- **5% to 10%**: Maximum 30 minutes\n- **0% to 5%**: No time limit\n\nOperators must install this within 10 flight hours after 5 July 1973."}},"importantCases":[],"_links":{"self":"/api/acts/ad-swsa226-10-engine-windmilling-limits-placard-installation","history":"/api/acts/ad-swsa226-10-engine-windmilling-limits-placard-installation/history","analysis":"/api/acts/ad-swsa226-10-engine-windmilling-limits-placard-installation/analysis","conflicts":"/api/acts/ad-swsa226-10-engine-windmilling-limits-placard-installation/conflicts","importantCases":"/api/acts/ad-swsa226-10-engine-windmilling-limits-placard-installation/important-cases","documents":"/api/acts/ad-swsa226-10-engine-windmilling-limits-placard-installation/documents"}}