{"id":"F2006B11062","name":"AD/LA-4/11 - Engine Mount Upper Side Straps - Inspection","slug":"ad-la-4-11-engine-mount-upper-side-straps-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56693,"registerId":"commonwealth-F2006B11062-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/LA-4/11 - Engine Mount Upper Side Straps - Inspection","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)  Consolidated Aeronautics, Colonial and LA-4 Series Aeroplanes\n\n \n\n \n\n| AD/LA-4/11 | Engine Mount Upper Side Straps - Inspection | 4/74 |\n| --- | --- | --- |\n| Applicability: | All Colonial C-2, LA-4A, LA-4P, LA-4 and LA-4-200 to S/No. 547. |  |\n| Document: | Consolidated Aeronautics SL L43. |  |\n\n\n \n\nCompliance: 1. Impartial inspection - within 25 hours time in service after 31 May 1974; and thereafter.\n\n \n\n2. Full inspection - at intervals not exceeding 100 hours time in service.\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\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2689},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive remains tightly focused on its original purpose from 1974: mandating inspections of engine mount straps on specific Colonial aircraft models to address a specific airworthiness concern. It has not expanded beyond this safety issue."},"complexity_factors":["Extremely brief text (under 150 words) with only two compliance requirements","Narrow applicability limited to five specific aircraft models by serial number","Simple temporal trigger (specific calendar date plus flight hours)","Incorporates by reference a single external technical document (Service Letter L43)","No nested exceptions, conditional logic, or interpretive provisions"],"plain_english_summary":"This AD requires owners/operators of specified Colonial and Lake C-2/LA-4 series aircraft (serials ≤547) to inspect the engine-mount upper-side straps for cracks, corrosion, or damage per the manufacturer’s Service Letter.  \n\nIt’s mandatory to catch mount defects early to prevent in-flight engine separation and ensure continued airworthiness of these vintage airplanes."}},"importantCases":[],"_links":{"self":"/api/acts/ad-la-4-11-engine-mount-upper-side-straps-inspection","history":"/api/acts/ad-la-4-11-engine-mount-upper-side-straps-inspection/history","analysis":"/api/acts/ad-la-4-11-engine-mount-upper-side-straps-inspection/analysis","conflicts":"/api/acts/ad-la-4-11-engine-mount-upper-side-straps-inspection/conflicts","importantCases":"/api/acts/ad-la-4-11-engine-mount-upper-side-straps-inspection/important-cases","documents":"/api/acts/ad-la-4-11-engine-mount-upper-side-straps-inspection/documents"}}