{"id":"F2006B07521","name":"AD/TURMO/3 - Gas Generator Rear Bearing - Permeability Checks","slug":"ad-turmo-3-gas-generator-rear-bearing-permeability-checks","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":50050,"registerId":"commonwealth-F2006B07521-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/TURMO/3 - Gas Generator Rear Bearing - Permeability Checks","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 - 106 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Turbomeca Turbine Engines - Turmo Series\n\n \n\nAD/TURMO/3  Gas Generator Rear Bearing - Permeability Checks\n\nApplicability: Turbo 111 C3, C5, C6, E3 and E6 engines. Requirement:  1. Turbomeca SL No. 220/71/41; or\n\n2. AD/TURB-T/5.\n\n \n\nCompliance: As detailed in the requirement document.\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\n12/85\n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2789},"content_quality":"ok","complexity_score":2,"rejection_reason":"","scope_assessment":{"changed":false,"description":"This remains a targeted safety directive addressing a specific mechanical defect in identified engine models. The scope has not expanded beyond the original safety purpose of ensuring bearing integrity."},"complexity_factors":["Incorporation by reference of external technical documents (manufacturer service letter and previous AD)","No defined terms or interpretation section","Simple binary applicability test (specific engine models only)"],"plain_english_summary":"This mandatory Civil Aviation Safety Authority airworthiness directive affects operators of aircraft with Turbomeca Turmo 111 C3/C5/C6 and E3/E6 engines, requiring non‑destructive \"permeability checks\" of the gas‑generator rear bearing to detect cracks, leaks or material defects.\n\nCompliance is by the deadlines in either Turbomeca Service Letter No. 220/71/41 or the alternative AD/TURB‑T/5. It prevents sudden, catastrophic engine failure."}},"importantCases":[],"_links":{"self":"/api/acts/ad-turmo-3-gas-generator-rear-bearing-permeability-checks","history":"/api/acts/ad-turmo-3-gas-generator-rear-bearing-permeability-checks/history","analysis":"/api/acts/ad-turmo-3-gas-generator-rear-bearing-permeability-checks/analysis","conflicts":"/api/acts/ad-turmo-3-gas-generator-rear-bearing-permeability-checks/conflicts","importantCases":"/api/acts/ad-turmo-3-gas-generator-rear-bearing-permeability-checks/important-cases","documents":"/api/acts/ad-turmo-3-gas-generator-rear-bearing-permeability-checks/documents"}}