{"id":"F2006B11407","name":"AD/NAV/2 - Rudder Horn - Inspection","slug":"ad-nav-2-rudder-horn-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":57308,"registerId":"commonwealth-F2006B11407-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/NAV/2 - Rudder Horn - Inspection","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/2 Rudder Horn - Inspection NK\n\nApplicability: All models from Navion to Navion H fitted with Rudder Horn P/N 145-24401. Requirement:               Inspect the rudder horn for corrosion and cracking.\n\nCompliance: Within 100 hours time in service after 28 November 1968, and thereafter at intervals not exceeding 12 months.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\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":1,"scope_assessment":{"changed":false,"description":"This is a discrete, standalone safety directive focused on a specific mechanical defect in a specific aircraft type. It has not expanded beyond its original purpose of ensuring rudder horn integrity."},"complexity_factors":["Single, specific aircraft type (Navion series)","Single, specific part number identified","One clear inspection requirement (visual check for corrosion/cracking)","Simple compliance schedule (once after date, then annually)","No defined terms section","No cross-references to other legislation","No conditional logic or exceptions","Extremely short document (under 150 words of substantive content)"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by the Civil Aviation Safety Authority (CASA) that requires owners and operators of specific aircraft to perform a safety inspection.\n\n**Who it affects:** Owners and operators of **Navion series aeroplanes** (models Navion through Navion H) that have a specific part installed: the **Rudder Horn with part number 145-24401**.\n\n**What it requires:** You must **inspect the rudder horn for corrosion and cracking** — essentially checking this steering component for rust and metal fatigue that could cause it to fail.\n\n**When you must comply:**\n- **First inspection:** Within 100 hours of flying time after 28 November 1968\n- **Ongoing:** Every 12 months after that\n\n**Why it matters:** The rudder controls the aircraft's direction. If the rudder horn corrodes or cracks, the pilot could lose directional control — a serious safety risk. This AD ensures the problem is caught before it causes an accident."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The supplied text sets a specific inspection requirement for a specified rudder horn and does not indicate any change from an original intent or prior scope. No information in the text shows that the directive’s scope has been altered."},"complexity_factors":["Narrow, single-component focus (rudder horn P/N 145-24401)","Clear, simple action required (inspect for corrosion and cracking)","Fixed, simple compliance intervals (initial within 100 hours TIS after 28 Nov 1968; then ≤12 months)","Limited procedural detail (inspection method and corrective actions not specified)","Limited applicability (specific Navion models only)","Historic reference date introduces legacy-compliance framing"],"plain_english_summary":"This AD targets Navion-series aeroplanes fitted with rudder horn P/N 145-24401, requiring inspection for corrosion and cracking within 100 hours TIS after 28 Nov 1968 and thereafter at intervals not exceeding 12 months. It places the inspection obligation and likely costs on owners/operators. The directive prescribes timing but not methods or acceptance criteria, leaving operators and maintenance providers to choose inspection techniques and any corrective actions, which creates practical discretion and implementation risk."}},"importantCases":[],"_links":{"self":"/api/acts/ad-nav-2-rudder-horn-inspection","history":"/api/acts/ad-nav-2-rudder-horn-inspection/history","analysis":"/api/acts/ad-nav-2-rudder-horn-inspection/analysis","conflicts":"/api/acts/ad-nav-2-rudder-horn-inspection/conflicts","importantCases":"/api/acts/ad-nav-2-rudder-horn-inspection/important-cases","documents":"/api/acts/ad-nav-2-rudder-horn-inspection/documents"}}