{"id":"F2006B11406","name":"AD/NAV/1 - Wing Panel - Inspection and Modification","slug":"ad-nav-1-wing-panel-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":57307,"registerId":"commonwealth-F2006B11406-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/NAV/1 - Wing Panel - 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)  Navion Series Aeroplanes\n\n \n\nAD/NAV/1 Wing Panel - Inspection and Modification NK\n\nApplicability: All models D, E, F and G with S/Nos. NAV-4-2 and subsequent. Document:  1. Navion SL No. 85; or\n\n2. FAA AD 64-4-5.\n\n \n\nCompliance: At intervals not exceeding 100 hours time in service.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\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":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-purpose airworthiness directive focused on a specific technical issue (wing panel inspection) for a specific aircraft type (Navion Series). It has not expanded beyond its original safety purpose. The document appears to be a complete, standalone directive as originally issued."},"complexity_factors":["Very short document (approximately 200 words)","Only 4 defined elements: applicability (specific models/serial numbers), compliance interval, and two reference documents","No nested conditional logic or exceptions","No cross-references to other legislation beyond the enabling Civil Aviation Regulations 1998","Single operational requirement (inspect/modify at set intervals)","Straightforward applicability criteria (specific model letters and serial number range)"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** issued by Australia's Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations 1998. It applies to **Navion Series aeroplanes** (specifically models D, E, F, and G with serial numbers NAV-4-2 and onwards).\n\n**What it requires:**\n- **Inspection and modification** of the wing panel on these aircraft\n- **Compliance deadline:** Must be done at intervals not exceeding 100 hours of \"time in service\" (meaning every 100 hours the aircraft is actually flying, not just sitting on the ground)\n\n**Why it matters:**\nAirworthiness Directives are legally binding safety orders. They are issued when a safety defect or unsafe condition is discovered in an aircraft type. Owners and operators must comply with ADs to keep their aircraft legally airworthy. Failure to comply means the aircraft cannot legally fly.\n\n**Technical references:**\nThe directive references two technical documents that contain the actual inspection/modification procedures:\n1. Navion Service Letter No. 85\n2. FAA Airworthiness Directive 64-4-5 (the US aviation safety regulator's equivalent order)"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument as provided specifies applicability (models D–G, S/N NAV-4-2 and subsequent), references the technical documents to be followed (Navion SL No. 85 or FAA AD 64-4-5), and sets the inspection/modification recurrence (not exceeding 100 hours TIS). The text contains no indication that the scope has been altered from any prior or original intent."},"complexity_factors":["Narrow and clear applicability (models D–G, S/N NAV-4-2 and subsequent) reduces scope complexity (Applicability).","Mandatory recurring interval is simple to state but leaves unspecified the timing of the initial action and any grace periods, creating operational ambiguity (Compliance).","Procedural detail and technical specifications are externalized to two referenced documents, requiring operators to obtain and interpret those materials (Document).","The AD text provides no cost, labour, parts, or scheduling information, increasing administrative and budgeting effort for operators.","The directive contains no explicit statement of objective or rationale, which limits internal contextual guidance for implementation."],"plain_english_summary":"This AD requires owners/operators of Navion models D–G (S/N NAV-4-2 and later) to carry out the wing‑panel inspection and any modification specified in Navion SL No. 85 or FAA AD 64‑4‑5, and to repeat that work at intervals not exceeding 100 hours time in service. The AD itself doesn’t include procedural detail, costs, or rationale — those are in the referenced documents, which operators must obtain and follow."}},"importantCases":[],"_links":{"self":"/api/acts/ad-nav-1-wing-panel-inspection-and-modification","history":"/api/acts/ad-nav-1-wing-panel-inspection-and-modification/history","analysis":"/api/acts/ad-nav-1-wing-panel-inspection-and-modification/analysis","conflicts":"/api/acts/ad-nav-1-wing-panel-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-nav-1-wing-panel-inspection-and-modification/important-cases","documents":"/api/acts/ad-nav-1-wing-panel-inspection-and-modification/documents"}}