{"id":"F2006B08237","name":"AD/CESSNA 337/18 - Fifth Seat Restraint - Modification","slug":"ad-cessna-337-18-fifth-seat-restraint-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115496,"registerId":"commonwealth-F2006B08237-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 337/18 - Fifth Seat Restraint - Modification","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 337 Series Aeroplanes\n\n \n\nAD/CESSNA 337/18 Fifth Seat Restraint - Modification 11/74\n\nApplicability: All Model T337G.\n\n \n\nRequirement: The fifth (rear) seat shall be positively attached to the cabin floor structure in accordance with a scheme approved by the Secretary.\n\n \n\nNote: Modification to Rex Aviation Ltd. Drawing No. RA-C-1341 is an acceptable means of compliance.\n\n \n\nCompliance: Before issue of a Certificate of Airworthiness.\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":1628},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This airworthiness directive maintains its original narrow scope, targeting only the specific safety issue of rear seat attachment for the Cessna T337G model."},"complexity_factors":["Single specific requirement applying to only one aircraft model","No defined terms or interpretation section","No cross-references to other legislation","Straightforward applicability with no exceptions or conditional logic"],"plain_english_summary":"This is a **safety rule for Cessna T337G aircraft** (twin-engine planes). It requires owners to **securely bolt the rear (fifth) seat to the cabin floor** before the aircraft can legally fly.\n\n**What must happen:**\n- The back seat must be \"positively attached\" (firmly fixed/bolted) to the floor structure using an engineering plan approved by the Secretary (the relevant government official)\n- One acceptable way to do this is following a specific technical drawing from Rex Aviation (Drawing No. RA-C-1341)\n- This modification must be completed **before the plane receives its Certificate of Airworthiness** (the official safety certificate required to fly)\n\n**Why this matters:** This prevents the rear seat from breaking loose during turbulence or in an accident, protecting passengers from serious injury."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-337-18-fifth-seat-restraint-modification","history":"/api/acts/ad-cessna-337-18-fifth-seat-restraint-modification/history","analysis":"/api/acts/ad-cessna-337-18-fifth-seat-restraint-modification/analysis","conflicts":"/api/acts/ad-cessna-337-18-fifth-seat-restraint-modification/conflicts","importantCases":"/api/acts/ad-cessna-337-18-fifth-seat-restraint-modification/important-cases","documents":"/api/acts/ad-cessna-337-18-fifth-seat-restraint-modification/documents"}}