{"id":"F2006B02601","name":"AD/B-2/29 Amdt 1 - Tail Rotor Drive Shaft - Inspection and Corrosion Proofing","slug":"ad-b-2-29-amdt-1-tail-rotor-drive-shaft-inspection-and-corrosion-proofing","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41891,"registerId":"commonwealth-F2006B02601-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B-2/29 Amdt 1 - Tail Rotor Drive Shaft - Inspection and Corrosion Proofing","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-2/29\n\nAmdt 1\n\n\nTail Rotor Drive Shaft - Inspection and Corrosion Proofing\n\n\n12/68\n\n \n\nApplicability: All model B2, B2A and B2B. Document:  Brantly SB No. B2B-68-2A.\n\nCompliance: Within 10 hours time in service after 31 December 1968.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\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-issue airworthiness directive from 1968 concerning a specific mechanical component on specific helicopter models. It has not expanded beyond its original safety purpose."},"complexity_factors":["Extremely short document (approximately 150 words)","Only 3 defined applicability categories (B2, B2A, B2B models)","Single compliance requirement with external reference to manufacturer service bulletin","No nested conditions, exceptions, or cross-references to other legislation","Straightforward temporal deadline (10 hours TIS after fixed date)","No interpretation section or defined terms"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It requires owners and operators of specific Brantly helicopters to inspect and treat the tail rotor drive shaft for corrosion.\n\n**What it does:**\n- Mandates inspection and \"corrosion proofing\" (protective treatment to prevent rust) of the tail rotor drive shaft on affected helicopters\n- Requires compliance with Brantly Service Bulletin B2B-68-2A (the manufacturer's official maintenance instructions)\n\n**Who it affects:**\n- Owners and operators of **Brantly B-2, B-2A, and B-2B model helicopters**\n\n**Why it matters:**\n- The tail rotor drive shaft transfers power to the tail rotor, which controls the helicopter's direction. Corrosion here could cause catastrophic failure and loss of control\n- This is **mandatory** — non-compliance grounds the aircraft (makes it illegal to fly)\n\n**Deadline:**\n- Must be completed within **10 flight hours after 31 December 1968**"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The text provided (Amdt 1) applies the requirement to all Brantly B2, B2A and B2B models and sets a compliance deadline. The amendment as presented does not indicate any expansion or narrowing of model applicability or change in the required action compared with the content shown here (Applicability; Document; Compliance)."},"complexity_factors":["Short, narrowly targeted directive with a single clear action (inspection and corrosion‑proofing).","Clear applicability to all B2/B2A/B2B models reduces ambiguity.","Very short compliance window (10 hours time in service after 31 December 1968) raises operational pressure.","Technical procedure is delegated to an external service bulletin (Brantly SB No. B2B‑68‑2A), so full technical complexity depends on that document which is not reproduced here.","No alternative compliance or exemption language provided in the text, creating a binary comply/do‑not‑comply choice for operators."],"plain_english_summary":"This Airworthiness Directive mandates that owners/operators of Brantly B‑2, B‑2A and B‑2B helicopters have the tail rotor drive shaft inspected and corrosion‑proofed per Brantly Service Bulletin B2B‑68‑2A. Work must be completed within 10 hours time‑in‑service after 31 December 1968.\n\nIt affects all listed airframes and their maintenance providers, imposes immediate cost and scheduling burdens on operators, and relies on the referenced service bulletin for technical steps."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b-2-29-amdt-1-tail-rotor-drive-shaft-inspection-and-corrosion-proofing","history":"/api/acts/ad-b-2-29-amdt-1-tail-rotor-drive-shaft-inspection-and-corrosion-proofing/history","analysis":"/api/acts/ad-b-2-29-amdt-1-tail-rotor-drive-shaft-inspection-and-corrosion-proofing/analysis","conflicts":"/api/acts/ad-b-2-29-amdt-1-tail-rotor-drive-shaft-inspection-and-corrosion-proofing/conflicts","importantCases":"/api/acts/ad-b-2-29-amdt-1-tail-rotor-drive-shaft-inspection-and-corrosion-proofing/important-cases","documents":"/api/acts/ad-b-2-29-amdt-1-tail-rotor-drive-shaft-inspection-and-corrosion-proofing/documents"}}