{"id":"F2006B08752","name":"AD/DAUPHIN/41 - Free Wheel Assembly","slug":"ad-dauphin-41-free-wheel-assembly","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52017,"registerId":"commonwealth-F2006B08752-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DAUPHIN/41 - Free Wheel Assembly","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)  Eurocopter SA 360 and SA 365 (Dauphin) Series Helicopters\n\n \n\nAD/DAUPHIN/41 Free Wheel Assembly 9/94\n\nApplicability: All model SA 365 helicopters versions C, C1, C2 and C3 equipped with free wheel assembly P/N 365A35.1004.00.\n\n \n\nRequirement: Unless previously carried out action in accordance with Eurocopter Telex Service No 10040.SI/0145/94 dated 25 May 1994.\n\n \n\nNote: DGAC AD 94-145-039(B) refers.\n\n \n\nCompliance: As specified in the Requirement Document with a revised effective date of 20 August 1994.\n\n \n\nBackground: The manufacturer has advised that following an incident the free wheel assembly in the helicopter was found without oil.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\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, targeted safety directive addressing a specific mechanical defect in a specific helicopter model. It has not expanded beyond its original purpose of mandating inspection/repair of the free wheel assembly oil issue."},"complexity_factors":["Very short document (approximately 150 words of substantive content)","Only 1 defined term implicitly referenced (the part number P/N 365A35.1004.00)","Single conditional exception ('Unless previously carried out')","No nested legislative cross-references — only refers to external technical document (Eurocopter Telex) and related foreign AD","Straightforward applicability criteria (specific model + specific part number)","Single compliance requirement with clear deadline"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations 1998.\n\n**What it does:** It requires owners and operators of specific Eurocopter Dauphin helicopters to carry out a safety inspection or repair on a particular part — the \"free wheel assembly\" (a component in the helicopter's transmission system that allows the main rotor to spin freely if the engine fails).\n\n**Who it affects:** Anyone who owns or operates:\n- **Eurocopter SA 365 model helicopters** (versions C, C1, C2, and C3)\n- **Only if** they have a specific part installed: free wheel assembly part number 365A35.1004.00\n\n**What must be done:** Operators must follow the instructions in **Eurocopter Telex Service No 10040.SI/0145/94** (dated 25 May 1994). This is a technical service bulletin from the manufacturer. If the work has already been done, you don't need to do it again.\n\n**Why it matters:** The manufacturer discovered that a helicopter's free wheel assembly was found **without oil** after an incident. Without proper lubrication, this critical component could fail, potentially causing loss of control or a crash. This directive prevents that failure by ensuring the assembly is properly inspected and maintained.\n\n**When to comply:** By **20 August 1994** (the revised effective date), following the timeline in the manufacturer's service document.\n\n**Key reference:** This aligns with a French aviation safety directive (DGAC AD 94-145-039(B)), showing international coordination on this safety issue."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument implements a corrective action specified by the manufacturer for a defined set of helicopters and a particular part number. The AD's stated scope (affected models with free wheel assembly P/N 365A35.1004.00) and mandated action (carry out the Eurocopter telex unless already done) are consistent with a targeted safety directive responding to the reported incident; there is no indication in the instrument itself that the scope was broadened or narrowed from its original corrective intent."},"complexity_factors":["Narrow, specific applicability (one helicopter family and one part number)","Mandates compliance with an external technical document (Eurocopter telex) rather than detailing technical steps in the AD","Regulatory binding nature: an AD requires action by operators to maintain airworthiness","Technical content delegated to manufacturer document — requires access to and interpretation of the telex","Potential operational impacts (downtime and maintenance) but no complex new legal regime or discretionary authority introduced"],"plain_english_summary":"Operators of Eurocopter SA 365 (versions C, C1, C2, C3) fitted with free wheel assembly P/N 365A35.1004.00 must carry out the corrective actions in Eurocopter Telex Service No 10040.SI/0145/94 (dated 25 May 1994) — unless already done — after a report that a free wheel assembly was found without oil. Compliance follows the telex (revised effective date 20 August 1994).\n\nAffected operators/owners and their MROs bear inspection, repair/replacement and downtime costs; non‑compliance leaves the helicopter non‑airworthy."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dauphin-41-free-wheel-assembly","history":"/api/acts/ad-dauphin-41-free-wheel-assembly/history","analysis":"/api/acts/ad-dauphin-41-free-wheel-assembly/analysis","conflicts":"/api/acts/ad-dauphin-41-free-wheel-assembly/conflicts","importantCases":"/api/acts/ad-dauphin-41-free-wheel-assembly/important-cases","documents":"/api/acts/ad-dauphin-41-free-wheel-assembly/documents"}}