{"id":"F2006B05062","name":"AD/CESSNA 180/49 - Self Locking Nuts","slug":"ad-cessna-180-49-self-locking-nuts","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44972,"registerId":"commonwealth-F2006B05062-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 180/49 - Self Locking Nuts","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)  Cessna 180, 182 and Wren 460 Series Aeroplanes\n\n \n\nAD/CESSNA 180/49 Self Locking Nuts 4/78\n\nApplicability: Model 180 with S/Nos. 18052678 to 18052698. Model 182 with S/Nos. 18264686 to\n\n18264736.\n\n \n\nRequirement: Action in accordance with Cessna SL No. SE77-44, Item 1. Compliance:  Within 100 hours time in service after 30 April 1978.\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":1779},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This directive maintains a narrow, technical scope focused solely on the inspection or replacement of self-locking nuts for specific aircraft serial numbers. There is no evidence of scope expansion beyond the original aviation safety intent."},"complexity_factors":["Document is extremely brief (under 150 words)","Only 2 aircraft models affected with narrowly defined serial number ranges","Single, unambiguous compliance requirement referencing one external standard","No defined terms, interpretation sections, or legislative cross-references","No conditional logic, exceptions, or nested requirements"],"plain_english_summary":"This Airworthiness Directive (AD) is a **mandatory safety notice** for owners of specific Cessna aircraft. If you operate a **Cessna 180** (serial numbers 18052678 to 18052698) or a **Cessna 182** (serial numbers 18264686 to 18264736), you must follow the manufacturer's instructions in **Cessna Service Letter SE77-44, Item 1** regarding self-locking nuts.\n\n**What you need to do:**\n- Inspect or replace the self-locking nuts as specified in the manufacturer's service letter\n- Complete this work within **100 hours of flight time** after 30 April 1978\n\nThis directive ensures that critical fasteners on these specific aircraft remain secure during flight, preventing potential mechanical failures that could compromise safety."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-180-49-self-locking-nuts","history":"/api/acts/ad-cessna-180-49-self-locking-nuts/history","analysis":"/api/acts/ad-cessna-180-49-self-locking-nuts/analysis","conflicts":"/api/acts/ad-cessna-180-49-self-locking-nuts/conflicts","importantCases":"/api/acts/ad-cessna-180-49-self-locking-nuts/important-cases","documents":"/api/acts/ad-cessna-180-49-self-locking-nuts/documents"}}