{"id":"F2006B04841","name":"AD/CA-6/1 - Tail Wheel Stabiliser Locknut - Inspection","slug":"ad-ca-6-1-tail-wheel-stabiliser-locknut-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44644,"registerId":"commonwealth-F2006B04841-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CA-6/1 - Tail Wheel Stabiliser Locknut - 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)  C.A.C. CA-6 (Wackett Trainer) Series Aeroplanes\n\n \n\nAD/CA-6/1 Tail Wheel Stabiliser Locknut - Inspection NK\n\nApplicability: All models.\n\n \n\nRequirement: Check the tightness of the tailwheel bungee stabiliser locknut (Part No. 06-34041). Compliance:               At intervals not exceeding 25 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","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive, as presented, imposes a standalone, recurring inspection requirement for a specific tailwheel component and does not indicate any expansion or narrowing of scope relative to prior material within the text supplied. No amendment to an earlier instrument or change of applicability is stated in the text; it simply prescribes the inspection (Requirement) and interval (Compliance) for \"All models\" (Applicability)."},"complexity_factors":["Narrow technical scope: single specific part identified (Part No. 06-34041) reduces breadth of affected systems (Requirement).","Prescriptive recurring interval: clear frequency (<= 25 hours time in service) simplifies scheduling but requires frequent checks (Compliance).","High clarity on applicability: covers \"All models\" of the CA-6 series, which simplifies identification of affected aircraft (Applicability).","Lack of procedural detail: no inspection method, acceptable torque or corrective action supplied, creating operator discretion in implementation (Requirement).","Enforcement and record-keeping not specified in the text provided; compliance mechanisms rely on the broader regulatory framework referenced in the header.","Single-point operational impact: cost and labour borne by owner/operator, with limited administrative complexity but recurring operational burden."],"plain_english_summary":"This AD requires owners/operators of C.A.C. CA-6 (Wackett Trainer) aeroplanes to check the tightness of the tailwheel bungee stabiliser locknut (Part No. 06‑34041) at intervals not exceeding 25 hours TIS. It’s a mandatory, narrowly focused recurring inspection that shifts cost and scheduling to aircraft operators, while leaving exact inspection method, torque criteria and record-keeping practices to the operator or maintenance organisation."},"kimi_summary":{"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This is a discrete, single-purpose airworthiness directive focused on one specific mechanical inspection. It has not expanded beyond its original safety purpose."},"complexity_factors":["Extremely short document (under 150 words)","No defined terms section","No cross-references to other legislation","Single, unambiguous requirement with clear compliance interval","No conditional logic or exceptions","Straightforward applicability (all models)"],"plain_english_summary":"**What this is:** This is an Airworthiness Directive (AD) — essentially a mandatory safety notice issued by the Civil Aviation Safety Authority (CASA) for a specific type of Australian aircraft.\n\n**What it does:** It requires owners and operators of C.A.C. CA-6 \"Wackett Trainer\" aeroplanes (a vintage military training aircraft from the 1940s) to regularly check that a specific nut on the tailwheel is tight enough.\n\n**The specific part:** The \"tailwheel bungee stabiliser locknut\" (part number 06-34041) must be checked for tightness.\n\n**How often:** Every 25 hours of flight time (\"time in service\" means actual flying hours, not just time since last check).\n\n**Why it matters:** A loose locknut on the tailwheel could cause the tailwheel to fail or behave unpredictably during takeoff, landing, or taxiing — potentially causing loss of control of the aircraft. This is a preventive maintenance requirement to catch problems before they cause accidents.\n\n**Who must comply:** Anyone operating or maintaining a CA-6 Wackett Trainer aircraft in Australia."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ca-6-1-tail-wheel-stabiliser-locknut-inspection","history":"/api/acts/ad-ca-6-1-tail-wheel-stabiliser-locknut-inspection/history","analysis":"/api/acts/ad-ca-6-1-tail-wheel-stabiliser-locknut-inspection/analysis","conflicts":"/api/acts/ad-ca-6-1-tail-wheel-stabiliser-locknut-inspection/conflicts","importantCases":"/api/acts/ad-ca-6-1-tail-wheel-stabiliser-locknut-inspection/important-cases","documents":"/api/acts/ad-ca-6-1-tail-wheel-stabiliser-locknut-inspection/documents"}}