{"id":"F2006B08373","name":"AD/CESSNA 400/9 - Fuel Crossover Line - Modification","slug":"ad-cessna-400-9-fuel-crossover-line-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115793,"registerId":"commonwealth-F2006B08373-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 400/9 - Fuel Crossover Line - 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 400 Series Aeroplanes\n\n \n\nAD/CESSNA 400/9 Fuel Crossover Line - Modification 4/69\n\nApplicability: All 401 and 402 series.\n\n \n\nDocument: Rex Aviation Tech. Memo TM-26, 1969. Compliance: Within 100 hours time in service after 12 May 1969.\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":1379},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This directive remains focused on its original narrow purpose: mandating a one-time safety modification to the fuel crossover line of specific Cessna aircraft models. There is no indication of scope creep or expansion beyond this specific technical fix."},"complexity_factors":["Single, unambiguous technical requirement with no exceptions or alternatives","No defined terms, interpretation clauses, or cross-references to other legislation","Straightforward applicability limited to two specific aircraft models","Simple compliance metric (flight hours countdown from a fixed date)"],"plain_english_summary":"**What this is:** A mandatory safety order requiring a specific repair to the fuel system of certain Cessna aircraft.\n\n**Who it affects:** Owners and operators of **Cessna 401 and 402 series aeroplanes**.\n\n**What you must do:** Modify the aircraft's **fuel crossover line** (a pipe or hose that allows fuel to flow between tanks) according to the technical instructions in Rex Aviation Technical Memo TM-26, dated 1969.\n\n**When you must do it:** Within **100 hours of flight time** after 12 May 1969. \"Time in service\" means actual flying hours, not just calendar time.\n\n**Why it matters:** This is a legally binding Airworthiness Directive. The modification fixes a safety defect in the fuel system that could potentially cause fuel leaks, engine failure, or fire if left unaddressed."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-400-9-fuel-crossover-line-modification","history":"/api/acts/ad-cessna-400-9-fuel-crossover-line-modification/history","analysis":"/api/acts/ad-cessna-400-9-fuel-crossover-line-modification/analysis","conflicts":"/api/acts/ad-cessna-400-9-fuel-crossover-line-modification/conflicts","importantCases":"/api/acts/ad-cessna-400-9-fuel-crossover-line-modification/important-cases","documents":"/api/acts/ad-cessna-400-9-fuel-crossover-line-modification/documents"}}