{"id":"F2006B06354","name":"AD/PT6A/13 - Fuel Pump Drive Coupling - Improved Lubrication","slug":"ad-pt6a-13-fuel-pump-drive-coupling-improved-lubrication","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47575,"registerId":"commonwealth-F2006B06354-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PT6A/13 - Fuel Pump Drive Coupling - Improved Lubrication","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)  Pratt and Whitney Canada Turbine Engines - PT6A Series\n\n \n\nAD/PT6A/13 Fuel Pump Drive Coupling - Improved Lubrication 10/85\n\nApplicability: All PT6A-6, -6A, -6B, -20, -27, -28, -34 and PT6B-9 with S/nos. as listed in the Requirement Document.\n\n \n\nRequirement: 1. UACL SB No. 230, Rev. 3;\n\n \n\n2.    UACL SB No. 1165; or\n\n \n\n3.    AD/UAC-T/11A.\n\n \n\nCompliance: In accordance with 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","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2974},"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive maintains a narrow, focused scope targeting only the fuel pump drive coupling lubrication issue for specific PT6A/PT6B engine models. There is no indication of scope expansion beyond the original safety-critical maintenance requirement."},"complexity_factors":["Substantive technical requirements contained in external Service Bulletins incorporated by reference rather than set out in the text","Applicability restricted to specific serial numbers listed in external documents","Multiple alternative compliance pathways requiring comparison of three different technical references","Aviation-specific terminology and cross-references to other Airworthiness Directives"],"plain_english_summary":"This Airworthiness Directive mandates a modification to the fuel pump drive coupling on specified Pratt & Whitney Canada PT6A/PT6B engines (only certain serial numbers) to improve lubrication. It affects owners and operators of those engines, who must comply with one of three approved technical documents (UACL Service Bulletin No. 230 Rev 3, No. 1165, or AD/UAC‑T/11A) within the prescribed timelines. The change prevents premature coupling wear or failure that could cause engine malfunction or in‑flight shutdown."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pt6a-13-fuel-pump-drive-coupling-improved-lubrication","history":"/api/acts/ad-pt6a-13-fuel-pump-drive-coupling-improved-lubrication/history","analysis":"/api/acts/ad-pt6a-13-fuel-pump-drive-coupling-improved-lubrication/analysis","conflicts":"/api/acts/ad-pt6a-13-fuel-pump-drive-coupling-improved-lubrication/conflicts","importantCases":"/api/acts/ad-pt6a-13-fuel-pump-drive-coupling-improved-lubrication/important-cases","documents":"/api/acts/ad-pt6a-13-fuel-pump-drive-coupling-improved-lubrication/documents"}}