{"id":"F2006B08275","name":"AD/CESSNA 340/3 - Wing Leading Edge Fuel Lines and Wiring - Inspection and Modification","slug":"ad-cessna-340-3-wing-leading-edge-fuel-lines-and-wiring-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115589,"registerId":"commonwealth-F2006B08275-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 340/3 - Wing Leading Edge Fuel Lines and Wiring - 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 340 Series Aeroplanes\n\n \n\nAD/CESSNA 340/3 Wing Leading Edge Fuel Lines and\n\nWiring - Inspection and Modification\n\nApplicability: Model 340 with S/Nos. 340-0001 to 340-0234. Document:  Cessna SL ME73-5 - Supplement No. 1.\n\nCompliance: Within 100 hours time in service after 30 November 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\n \n\n\n11/73\n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive from 1973 addressing a specific technical defect in a limited aircraft population. It has not expanded beyond its original narrow scope."},"complexity_factors":["Extremely short document (approximately 150 words)","Only one defined applicability criterion (serial number range)","Single compliance deadline with straightforward calculation (100 hours after fixed date)","No cross-references to other legislation or regulations beyond the enabling Civil Aviation Regulations 1998","No conditional logic, exceptions, or nested provisions","Refers to external technical document (Cessna Service Letter) rather than detailing procedures in the legislative text itself"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It applies to specific **Cessna 340 aircraft** (serial numbers 340-0001 through 340-0234).\n\n**What it requires:**\n- Owners and operators must **inspect and modify the fuel lines and wiring** located in the wing leading edge (the front part of the wing).\n- The work must follow the technical instructions in **Cessna Service Letter ME73-5, Supplement No. 1**.\n\n**When it must be done:**\n- Within **100 hours of flight time** after 30 November 1973.\n\n**Why it matters:**\nAirworthiness Directives are legally binding safety fixes. They typically address defects that could cause accidents — in this case, likely risks of fuel leaks or electrical faults in the wing structure. Ignoring an AD means the aircraft cannot legally fly."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The text sets a specific scope (Model 340, S/N 340-0001 to 340-0234) and a compliance deadline; there is no statement in the AD provided that amends, expands or narrows that scope from an earlier version. The document contains no indication that the scope has changed from its original form."},"complexity_factors":["Narrow applicability limited to Model 340, S/N 340-0001 to 340-0234 (Applicability)","Single required action type: inspection and modification of wing leading edge fuel lines and wiring (title)","Clear, short compliance window: within 100 hours time in service after 30 November 1973 (Compliance)","Dependence on an external manufacturer document (Cessna SL ME73-5 - Supplement No. 1) which adds procedural detail outside the AD text (Document)","Potential operational complexity from arranging maintenance/parts and grounding aircraft during work, though not specified in the AD text"],"plain_english_summary":"This Airworthiness Directive (AD) requires owners/operators of certain Cessna 340 aeroplanes to inspect and modify the fuel lines and wiring located in the wing leading edge. Mechanically, it directs that the inspection and any required modification be carried out in accordance with the referenced manufacturer document (Cessna SL ME73-5 - Supplement No. 1) for aircraft in the listed serial number range (Model 340, S/N 340-0001 to 340-0234) and within a set time window (within 100 hours time in service after 30 November 1973) (Applicability; Document; Compliance).\n\nWho it affects\n- Owners and operators of Cessna Model 340 aircraft with serial numbers 340-0001 to 340-0234 (Applicability).  \n- Maintenance organisations or technicians who will perform the inspection and modification as prescribed in the referenced Cessna document (Document).\n\nWhat it requires and how compliance works\n- Inspect the wing leading edge fuel lines and wiring, and make whatever modifications the referenced Cessna supplement prescribes (title and document reference).  \n- Complete the inspection/modification within 100 hours time in service after 30 November 1973 (Compliance).  \n- The AD points to a specific manufacturer document (Cessna SL ME73-5 - Supplement No. 1) as the technical instruction set; compliance therefore depends on following that document’s procedures (Document).\n\nWho pays and who decides\n- Costs for inspection, any parts, and labour fall on the aircraft owners/operators who must comply.  \n- Decisions about how to carry out the work are constrained by the referenced manufacturer's supplement; qualified maintenance personnel must interpret and implement those instructions (Document).\n\nPractical effects, incentives and trade-offs to note\n- The requirement creates a near-term maintenance obligation for affected aircraft within the stated hours window (Compliance).  \n- The manufacturer document will determine the specific procedures, parts and time required; that centralises technical discretion with the document’s instructions rather than the AD text itself (Document).  \n- Owners face direct compliance costs (inspection labour, parts, possible grounding while work is done).  \n- The AD’s scope is narrow (limited serial-number range), so costs and burdens are concentrated on a defined set of aircraft rather than spread across a broad fleet (Applicability).\n\nImplementation and compliance risk\n- The AD’s enforceable requirements are concise (who, what, and when are specified).  \n- The actual implementation burden depends on the content and availability of the referenced Cessna supplement and on access to appropriately qualified maintenance providers (Document).  \n\nSource citations: Applicability; Document; Compliance. (AD/CESSNA 340/3, 11/73.)"}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-340-3-wing-leading-edge-fuel-lines-and-wiring-inspection-and-modification","history":"/api/acts/ad-cessna-340-3-wing-leading-edge-fuel-lines-and-wiring-inspection-and-modification/history","analysis":"/api/acts/ad-cessna-340-3-wing-leading-edge-fuel-lines-and-wiring-inspection-and-modification/analysis","conflicts":"/api/acts/ad-cessna-340-3-wing-leading-edge-fuel-lines-and-wiring-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-cessna-340-3-wing-leading-edge-fuel-lines-and-wiring-inspection-and-modification/important-cases","documents":"/api/acts/ad-cessna-340-3-wing-leading-edge-fuel-lines-and-wiring-inspection-and-modification/documents"}}