{"id":"F2006B09360","name":"AD/ECUREUIL/54 - Main Rotor Shaft Oil Jet","slug":"ad-ecureuil-54-main-rotor-shaft-oil-jet","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":53619,"registerId":"commonwealth-F2006B09360-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/ECUREUIL/54 - Main Rotor Shaft Oil Jet","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 AS 350 (Ecureuil) Series Helicopters\n\n \n\nAD/ECUREUIL/54 Main Rotor Shaft Oil Jet 2/95\n\nDM\n\nApplicability: All AS 350 series helicopters with main rotor shaft P/N 350A37.0003 all dash numbers which have been in operation for less than 100 hours time in service since new or overhauled.\n\n \n\nRequirement: Action in accordance with Eurocopter Telex Service No 10087.SI/0353/94. Compliance:              By 6 January 1995.\n\nBackground: A one-off inspection to determine if the oil jet for the main rotor mast bearing has been incorrectly installed is required. An incorrectly installed oil jet could result in inadequate lubrication of the main rotor mast bearing with possible serious consequences.\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":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1692},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive remains tightly focused on its original purpose: preventing mechanical failure due to a specific manufacturing or maintenance error (incorrect oil jet installation) on defined helicopter models. There is no evidence of scope expansion beyond this targeted safety intervention."},"complexity_factors":["Single, unambiguous maintenance task with no sub-conditions or exceptions","Limited applicability criteria based on only two factors (part number and flight hours)","External technical reference incorporated by citation rather than reproduced in full","No defined terms, interpretive provisions, or cross-references to other legislative provisions"],"plain_english_summary":"**What this is:** A mandatory safety inspection rule (called an Airworthiness Directive) issued by the Civil Aviation Safety Authority for certain Eurocopter helicopters.\n\n**Who it affects:** Operators of AS 350 'Ecureuil' series helicopters fitted with a specific main rotor shaft part number (P/N 350A37.0003) that have accumulated fewer than 100 hours of flight time since being manufactured new or since their last major overhaul.\n\n**What you must do:** Perform a one-time inspection to verify that the oil jet supplying lubricant to the main rotor mast bearing is installed correctly. The technical procedure is detailed in Eurocopter Telex Service No 10087.SI/0353/94.\n\n**Why it matters:** An incorrectly installed oil jet can block or reduce oil flow to the main rotor bearing, causing inadequate lubrication. This could lead to bearing failure, loss of control of the helicopter, and potentially a fatal accident.\n\n**Deadline:** The inspection must be completed by 6 January 1995."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ecureuil-54-main-rotor-shaft-oil-jet","history":"/api/acts/ad-ecureuil-54-main-rotor-shaft-oil-jet/history","analysis":"/api/acts/ad-ecureuil-54-main-rotor-shaft-oil-jet/analysis","conflicts":"/api/acts/ad-ecureuil-54-main-rotor-shaft-oil-jet/conflicts","importantCases":"/api/acts/ad-ecureuil-54-main-rotor-shaft-oil-jet/important-cases","documents":"/api/acts/ad-ecureuil-54-main-rotor-shaft-oil-jet/documents"}}