{"id":"F2006B08196","name":"AD/CESSNA 320/18 - Fuel Crossfeed Lines - Inspection and Modification","slug":"ad-cessna-320-18-fuel-crossfeed-lines-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115405,"registerId":"commonwealth-F2006B08196-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 320/18 - Fuel Crossfeed Lines - Inspection and 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 320 Series Aeroplanes\n\n \n\nAD/CESSNA 320/18 Fuel Crossfeed Lines - Inspection\n\nand Modification\n\n\n10/73\n\n \n\nApplicability: Model 320 with S/Nos. 320D0001 to 320F0045 except S/Nos. 310Q0644, 310Q0666, 310Q0678 and 310Q0692.\n\n \n\nDocument: Cessna ME73-13 and Supplement 1.\n\n \n\nCompliance: Within 100 hours time in service after 31 October 1973.\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":1396},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This 1973 directive maintains its original narrow scope. It addresses a specific technical defect in fuel crossfeed lines for a limited subset of Cessna 320 aircraft without expanding into unrelated systems or aircraft models."},"complexity_factors":["Single-page document with minimal text","Only one defined applicability criterion (serial number range)","Single compliance action with unambiguous deadline","No nested exceptions or conditional clauses beyond the four excluded serial numbers"],"plain_english_summary":"**What this is:** An Airworthiness Directive (AD) — a mandatory safety order issued under the Civil Aviation Regulations requiring specific maintenance on certain aircraft.\n\n**What it requires:** Owners and operators must inspect and modify the **fuel crossfeed lines** (the pipes that let fuel flow between the left and right wing tanks) on specific Cessna 320 aircraft.\n\n**Which aircraft:** Model 320 planes with serial numbers from 320D0001 to 320F0045, **except** four specific serial numbers: 310Q0644, 310Q0666, 310Q0678, and 310Q0692.\n\n**How to comply:** Carry out the work according to Cessna technical document ME73-13 and Supplement 1. This must be done within 100 hours of flight time after 31 October 1973.\n\n**Why it matters:** Fuel line failures can cause fuel leaks, engine failure, or fire. This directive ensures potentially defective crossfeed lines are identified and fixed before they cause accidents."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-320-18-fuel-crossfeed-lines-inspection-and-modification","history":"/api/acts/ad-cessna-320-18-fuel-crossfeed-lines-inspection-and-modification/history","analysis":"/api/acts/ad-cessna-320-18-fuel-crossfeed-lines-inspection-and-modification/analysis","conflicts":"/api/acts/ad-cessna-320-18-fuel-crossfeed-lines-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-cessna-320-18-fuel-crossfeed-lines-inspection-and-modification/important-cases","documents":"/api/acts/ad-cessna-320-18-fuel-crossfeed-lines-inspection-and-modification/documents"}}