{"id":"F2006B11220","name":"AD/M20/12 - Rudder Seals - Installation","slug":"ad-m20-12-rudder-seals-installation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56938,"registerId":"commonwealth-F2006B11220-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/M20/12 - Rudder Seals - 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)  Mooney M20 Series Aeroplanes\n\n \n\nAD/M20/12 Rudder Seals - Installation 9/67\n\nApplicability: All model M20F with S/Nos. 670001 to 670362. Document:  Mooney SB No. M20-148.\n\nCompliance: Within 100 hours time in service after 7 September 1967.\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\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1782},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This directive retains its original narrow technical scope, applying only to the specific aircraft models and serial numbers identified, and addressing solely the installation of rudder seals as originally specified."},"complexity_factors":["Single operative requirement (install seals)","No interpretation section or defined terms","Only one external cross-reference (to manufacturer service bulletin)","No exceptions, exemptions, or conditional logic","Extremely short length (approximately 50 words of substance)"],"plain_english_summary":"**What this is:** A mandatory safety order (called an *Airworthiness Directive*) that requires specific aircraft owners to install new seals on the rudder control system.\n\n**Who it affects:** Owners and operators of **Mooney M20F aircraft** with serial numbers between 670001 and 670362 (these are specific planes manufactured in 1967).\n\n**What you must do:** Install rudder seals following the manufacturer's instructions in **Mooney Service Bulletin M20-148**. This must be done within **100 hours of flight time** after 7 September 1967.\n\n**Why it matters:** This directive addresses a specific safety issue with the rudder seals to ensure the aircraft remains airworthy and safe to fly."}},"importantCases":[],"_links":{"self":"/api/acts/ad-m20-12-rudder-seals-installation","history":"/api/acts/ad-m20-12-rudder-seals-installation/history","analysis":"/api/acts/ad-m20-12-rudder-seals-installation/analysis","conflicts":"/api/acts/ad-m20-12-rudder-seals-installation/conflicts","importantCases":"/api/acts/ad-m20-12-rudder-seals-installation/important-cases","documents":"/api/acts/ad-m20-12-rudder-seals-installation/documents"}}