{"id":"F2006B08431","name":"AD/CESSNA 550/3 - Cabin Door Frame - Inspection, Modification and Replacement","slug":"ad-cessna-550-3-cabin-door-frame-inspection-modification-and-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115913,"registerId":"commonwealth-F2006B08431-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 550/3 - Cabin Door Frame - Inspection, Modification and Replacement","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 550 (Citation II) Series Aeroplanes\n\n \n\n# AD/CESSNA 550/3 Cabin Door Frame - Inspection,\n\nModification and Replacement\n\nApplicability: All models 550 with unit numbers 0002 to 0128. Document:  Cessna Citation II SB 550-53-3, Revision 4.\n\nCompliance: As per requirement document.\n\n# 7/82\n\n \n\nBackground: The possibility of marginal edge distances of rivets common to the fuselage frame and “Z” angle of the aft door post exists.\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":1631},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument retains its original limited scope, addressing only the specific manufacturing defect in early-production Cessna 550 aircraft door frames as originally identified."},"complexity_factors":["Defers all technical implementation details to an external manufacturer document (Cessna Service Bulletin 550-53-3)","Extremely narrow applicability limited to specific serial number range (47 aircraft)","Uses specialized aviation engineering terms ('Z angle', 'marginal edge distances', 'fuselage frame') without lay definitions"],"plain_english_summary":"This safety directive requires owners of specific Cessna Citation II business jets (serial numbers 0002 through 0128) to inspect and potentially repair the cabin door frame.\n\n**The Safety Issue:**\nThe rivets connecting the door frame to the aircraft body may be positioned too close to the edge of the metal material. This \"marginal edge distance\" weakens the structural connection and could lead to failure of the door frame attachment.\n\n**Required Action:**\nOperators must follow the detailed technical instructions in **Cessna Service Bulletin 550-53-3, Revision 4** to:\n- Inspect the affected rivets where the fuselage frame meets the aft door post\n- Perform modifications or replacements if the rivets are found to be inadequately spaced\n\n**Who Must Comply:**\nAnyone operating a Cessna 550 model aircraft within serial numbers 0002–0128. The aircraft cannot be considered airworthy until these steps are completed."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-550-3-cabin-door-frame-inspection-modification-and-replacement","history":"/api/acts/ad-cessna-550-3-cabin-door-frame-inspection-modification-and-replacement/history","analysis":"/api/acts/ad-cessna-550-3-cabin-door-frame-inspection-modification-and-replacement/analysis","conflicts":"/api/acts/ad-cessna-550-3-cabin-door-frame-inspection-modification-and-replacement/conflicts","importantCases":"/api/acts/ad-cessna-550-3-cabin-door-frame-inspection-modification-and-replacement/important-cases","documents":"/api/acts/ad-cessna-550-3-cabin-door-frame-inspection-modification-and-replacement/documents"}}