{"id":"F2006B02602","name":"AD/B-2/3 - Tail Rotor Drive - Inspection","slug":"ad-b-2-3-tail-rotor-drive-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41892,"registerId":"commonwealth-F2006B02602-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B-2/3 - Tail Rotor Drive - 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)  Brantly B-2 Series Helicopters\n\n \n\nAD/B-2/3 Tail Rotor Drive - Inspection 12/60\n\nApplicability: All model B-2. Document: Brantly SB No. 3.\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\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 specifically on tail rotor drive inspections for one helicopter model series. It has not expanded beyond its original safety purpose."},"complexity_factors":["Extremely short document (approximately 100 words of substantive content)","Only 1 defined applicability criterion (model B-2)","Single compliance requirement with clear time interval (100 hours)","No cross-references to other legislation beyond generic 'Civil Aviation Regulations 1998, Part 39' header","No conditional logic, exceptions, or nested provisions","References external technical document (Service Bulletin) rather than embedding complex technical specifications"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** issued by Australia's Civil Aviation Safety Authority (CASA) for **Brantly B-2 series helicopters**. It mandates a specific safety inspection of the **tail rotor drive system**.\n\n**What it does:**\n- Requires owners and operators of these helicopters to inspect the tail rotor drive mechanism regularly\n- The inspection must be performed **every 100 hours of flight time** (\"time in service\")\n- The technical details of how to perform this inspection are found in **Brantly Service Bulletin No. 3** (the manufacturer’s official maintenance notice)\n\n**Who it affects:**\n- Anyone who owns or operates a **Brantly B-2 model helicopter** in Australia\n- Maintenance engineers who work on these aircraft\n\n**Why it matters:**\nThe tail rotor keeps the helicopter from spinning uncontrollably. If the tail rotor drive fails, the aircraft can become impossible to control. This directive exists because the aviation regulator identified a potential safety issue with this specific helicopter model and is legally requiring periodic checks to catch problems before they cause accidents.\n\nAirworthiness Directives are **legally binding orders** — compliance is mandatory, not optional. Flying without completing required ADs violates civil aviation law."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD text establishes a single recurring inspection requirement for all Brantly B-2 helicopters and references Brantly SB No. 3. The excerpt contains no indication that the applicability or the 100‑hour compliance interval has been altered from any prior or original intent; it presents a straightforward, specific scope limited to tail rotor drive inspection. (Applicability; Document; Compliance)"},"complexity_factors":["Single, narrowly defined requirement (tail rotor drive inspection) reduces regulatory branching.","Clear applicability: applies to all Brantly B-2 models (simple population). (Applicability)","Compliance rule is concise (fixed interval: every 100 hours TIS), lowering interpretation burden. (Compliance)","Technical procedure is delegated to an external document (Brantly SB No. 3), so practical compliance requires consulting that bulletin — adds operational complexity. (Document)","No procedural details, enforcement mechanisms, or tolerances provided in the AD text — operators must rely on wider regulatory context for consequences and on the SB for steps."],"plain_english_summary":"This AD requires owners and operators of Brantly B‑2 helicopters to inspect the tail-rotor drive per Brantly Service Bulletin No. 3 at intervals not exceeding 100 hours time‑in‑service. It legally mandates recurring inspections (and any resulting maintenance), affecting owners/operators and maintenance organisations by creating a predictable, ongoing cost and scheduling obligation to ensure the component is routinely examined for wear or defects."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b-2-3-tail-rotor-drive-inspection","history":"/api/acts/ad-b-2-3-tail-rotor-drive-inspection/history","analysis":"/api/acts/ad-b-2-3-tail-rotor-drive-inspection/analysis","conflicts":"/api/acts/ad-b-2-3-tail-rotor-drive-inspection/conflicts","importantCases":"/api/acts/ad-b-2-3-tail-rotor-drive-inspection/important-cases","documents":"/api/acts/ad-b-2-3-tail-rotor-drive-inspection/documents"}}