{"id":"F2006B08324","name":"AD/CESSNA 400/38 - Wing Leading Edge Fuel Lines and Wiring - Inspection and Modification","slug":"ad-cessna-400-38-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":115731,"registerId":"commonwealth-F2006B08324-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 400/38 - 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 400 Series Aeroplanes\n\n \n\nAD/CESSNA 400/38 Wing Leading Edge Fuel Lines and\n\nWiring - Inspection and Modification\n\nApplicability: All models with S/Nos. as listed in requirement document. 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\n10/73\n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a vintage 1973 airworthiness directive with a narrow, specific purpose: addressing a known safety issue with fuel lines and wiring in a particular aircraft series. The scope remains tightly constrained to that original safety purpose with no evidence of expansion into broader regulatory matters."},"complexity_factors":["Extremely short document — approximately 150 words","Only 4 operative provisions: applicability, reference document, compliance deadline, and subject matter","No defined terms section — relies entirely on external Cessna service document","No conditional logic, exceptions, or nested provisions","Single cross-reference to external technical document (Cessna SL ME73-5)","Fixed, unambiguous compliance deadline (100 hours TIS after specific date)"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) that requires owners and operators of specific aircraft to take corrective action.\n\n**What it does:** It orders inspections and modifications to the **wing leading edge fuel lines and wiring** on Cessna 400 series aeroplanes. The \"leading edge\" is the front part of the wing that cuts through the air first.\n\n**Who it affects:** Owners and operators of **all Cessna 400 series aircraft** with specific serial numbers listed in Cessna Service Letter ME73-5, Supplement No. 1.\n\n**What must be done:** Aircraft must be inspected and modified according to the technical instructions in that Cessna service document.\n\n**When it must be done:** Within **100 hours of flight time** after **30 November 1973**.\n\n**Why it matters:** Fuel lines and electrical wiring in the wing leading edge are critical safety components. Damage, wear, or improper installation here could cause fuel leaks or electrical failures — both serious fire and flight safety hazards. This AD ensures these systems are checked and fixed before they fail."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive sets a specific inspection and modification requirement for wing leading edge fuel lines and wiring on identified Cessna 400 series aeroplanes and prescribes a clear compliance window; there is no indication within the text provided that the scope was altered from that stated intent. The directive delegates procedural detail and affected serial numbers to the referenced Cessna document, but that delegation is part of the stated scope rather than a change in scope."},"complexity_factors":["Cross-reference to an external manufacturer document (Cessna SL ME73-5 - supplement No. 1) for procedural detail rather than containing procedures in the directive itself (Document).","Applicability limited to serial numbers listed in the referenced document, requiring owners/operators to check the external list to know if they are affected (Applicability).","A fixed, short compliance window tied to aircraft hours after a specific calendar date (100 hours after 30 November 1973), which creates scheduling pressure for affected aircraft (Compliance).","Technical nature of required work (inspection and modification) implies specialised maintenance activity and potential aircraft downtime, even though the directive does not spell out qualifications or resource requirements (Title & Document).","The directive states required action and timing but not cost allocation, performance standards, or enforcement details, requiring implementers to interpret next steps from the referenced document and standard regulatory practice (Header, Document & Compliance)."],"plain_english_summary":"The Civil Aviation Safety Authority issued an airworthiness directive requiring operators of certain Cessna 400‑series aeroplanes (serial numbers listed in Cessna SL ME73‑5 supplement No. 1) to inspect and, if required, modify wing leading‑edge fuel lines and wiring per that Cessna document. Work must be completed within 100 hours TIS after 30 November 1973. Affected owners/operators must arrange and fund the technical maintenance within that fixed compliance window."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-400-38-wing-leading-edge-fuel-lines-and-wiring-inspection-and-modification","history":"/api/acts/ad-cessna-400-38-wing-leading-edge-fuel-lines-and-wiring-inspection-and-modification/history","analysis":"/api/acts/ad-cessna-400-38-wing-leading-edge-fuel-lines-and-wiring-inspection-and-modification/analysis","conflicts":"/api/acts/ad-cessna-400-38-wing-leading-edge-fuel-lines-and-wiring-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-cessna-400-38-wing-leading-edge-fuel-lines-and-wiring-inspection-and-modification/important-cases","documents":"/api/acts/ad-cessna-400-38-wing-leading-edge-fuel-lines-and-wiring-inspection-and-modification/documents"}}