{"id":"F2006B02112","name":"AD/AC/52 - Pilot Compartment Side Windows - Replacement","slug":"ad-ac-52-pilot-compartment-side-windows-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41342,"registerId":"commonwealth-F2006B02112-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AC/52 - Pilot Compartment Side Windows - Replacement","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 10/1973,Aircraft below 5700 kg,Twin Commander (Gulfstream/Rockwell/ Aerocommander 500, 600 and 700) Series Aeroplanes,Pilot Compartment Side Windows - Replacement,52\ntitle: Airworthiness Directive - AD/AC/52 - Pilot Compartment Side Windows - Replacement\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)  Twin Commander (Gulfstream/Rockwell/ Aerocommander 500, 600 and 700) Series Aeroplanes\n\n \n\n \n\n| AD/AC/52 | Pilot Compartment Side Windows - Replacement | 10/73 |\n| --- | --- | --- |\n| Applicability: | All model 690A with S/Nos. 11102 to 11107, and 11109 to 11116. |  |\n| Document: | Aero Commander SL No. 270. |  |\n\n\n \n\nCompliance: Within 100 hours’ time in service after 22 October 1973 or before 1 January 1974 whichever occurs first.\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":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2059},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is the original 1973 directive; no evidence of subsequent amendment or scope expansion beyond the initial safety mandate."},"complexity_factors":["Narrow applicability limited to specific aircraft model and serial number ranges","Single compliance action with alternative deadline calculation","No interpretative provisions or defined terms"],"plain_english_summary":"This **Airworthiness Directive** (a legally enforceable safety order) requires owners and operators of specific **Twin Commander 690A aircraft** to replace the pilot compartment side windows.\n\n**Who it affects:**\n- Owners and operators of Twin Commander model 690A aircraft with serial numbers 11102–11107 and 11109–11116.\n\n**What it requires:**\n- Replace the pilot side windows according to manufacturer Service Letter No. 270.\n- Complete the work within **100 hours' time in service** (flight hours) after 22 October 1973, or before 1 January 1974, whichever comes first.\n\n**Why it matters:**\nThe directive addresses potential safety defects in the original cockpit windows to ensure the aircraft remains airworthy and safe to operate."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ac-52-pilot-compartment-side-windows-replacement","history":"/api/acts/ad-ac-52-pilot-compartment-side-windows-replacement/history","analysis":"/api/acts/ad-ac-52-pilot-compartment-side-windows-replacement/analysis","conflicts":"/api/acts/ad-ac-52-pilot-compartment-side-windows-replacement/conflicts","importantCases":"/api/acts/ad-ac-52-pilot-compartment-side-windows-replacement/important-cases","documents":"/api/acts/ad-ac-52-pilot-compartment-side-windows-replacement/documents"}}