{"id":"F2006B02068","name":"AD/AC/1 - Wing Rib - Reinforcement","slug":"ad-ac-1-wing-rib-reinforcement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41298,"registerId":"commonwealth-F2006B02068-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AC/1 - Wing Rib - Reinforcement","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 NK,Aircraft below 5700 kg,Twin Commander (Gulfstream/Rockwell/ Aerocommander 500, 600 and 700) Series Aeroplanes,Wing Rib - Reinforcement,1\ntitle: Airworthiness Directive - AD/AC/1 - Wing Rib - Reinforcement\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\nAD/AC/1 Wing Rib - Reinforcement NK\n\nApplicability: Model 520: S/Nos. 520-81 to 520-86 plus -89 and -92. Document:  Aero Commander SB No. 20.\n\nCompliance: Forthwith.\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\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2197},"content_quality":"rejected","complexity_score":2,"rejection_reason":"Content appears to be an incomplete fragment or stub extracted from a web document or PDF conversion; it contains XML/XHTML artifacts, metadata tags, a broken image reference, and ends abruptly with extensive whitespace. The text lacks the substantive technical requirements of the directive beyond a generic incorporation of an external Service Bulletin, suggesting the actual airworthiness requirements (what reinforcement is required, how to perform it, etc.) are missing.","scope_assessment":{"changed":false,"description":"The scope appears limited to the specific aircraft model and serial numbers listed in the applicability section. While the text references an external Service Bulletin, this is standard practice for Airworthiness Directives and does not represent scope creep beyond the original intent of issuing mandatory safety requirements for specific aircraft types."},"complexity_factors":["Extremely brief text (under 100 words of substantive content)","Single compliance requirement with no conditional logic or exceptions","Incorporation by reference to external technical document (Service Bulletin No. 20) means full requirements are not contained in the legislative text itself","No defined terms section within the provided fragment"],"plain_english_summary":"This appears to be a fragment of an Airworthiness Directive (AD) issued by the Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations 1988 (Part 39). An Airworthiness Directive is a legally binding safety order issued to address unsafe conditions in aircraft. This particular directive (AD/AC/1) applies to specific Twin Commander Model 520 aeroplanes (serial numbers 520-81 through 520-86, plus 89 and 92). It mandates that operators must comply with Aero Commander Service Bulletin No. 20 **forthwith** (immediately). The actual technical requirements—presumably detailing wing rib reinforcement modifications or inspections—are not included in the text provided, but are incorporated by reference to the Service Bulletin."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ac-1-wing-rib-reinforcement","history":"/api/acts/ad-ac-1-wing-rib-reinforcement/history","analysis":"/api/acts/ad-ac-1-wing-rib-reinforcement/analysis","conflicts":"/api/acts/ad-ac-1-wing-rib-reinforcement/conflicts","importantCases":"/api/acts/ad-ac-1-wing-rib-reinforcement/important-cases","documents":"/api/acts/ad-ac-1-wing-rib-reinforcement/documents"}}