{"id":"F2006B08488","name":"AD/CF6/5 - Fuel Supply Manifold","slug":"ad-cf6-5-fuel-supply-manifold","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":51176,"registerId":"commonwealth-F2006B08488-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CF6/5 - Fuel Supply Manifold","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)  General Electric Turbine Engines - CF6 Series\n\n \n\nAD/CF6/5 Fuel Supply Manifold 9/85\n\nApplicability:  General Electric CF6-80A, -80A2 engines. Requirement: FAA TAD No. T85-15-51.\n\nCompliance: As per Requirement Document.\n\n \n\nBackground: General Electric has advised of 3 fuel supply manifolds failing due to cracking at the “Y” section. The manifolds’ Part No 9327M46G01, 02, are the subject of FAA Emergency Telegraphic Airworthiness Directive T85-15-51 which requires a cycle life limit of 2500 cycles. Any manifold in service with a cycle life in excess of 2500 cycles must be replaced within 100 cycles following receipt of FAA TAD No T85- 15-51.\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, time-bound safety directive addressing a specific mechanical defect. It has not expanded beyond its original purpose of mandating replacement of cracked-prone fuel manifolds."},"complexity_factors":["Very short document (under 200 words)","Only 2 defined engine models and 2 part numbers specified","Single compliance requirement with clear numerical threshold (2,500 cycles)","No nested exceptions or conditional logic","References external FAA document but incorporates it by simple reference without complex integration","Straightforward cause-and-effect: exceed cycle limit → must replace"],"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) for aircraft engines.\n\n**What it does:** It requires owners and operators of specific General Electric jet engines (the CF6-80A and CF6-80A2 models) to replace certain fuel supply manifolds (Part Numbers 9327M46G01 and 9327M46G02) if they have been used for more than 2,500 flight cycles.\n\n**Why it matters:** General Electric discovered that these manifolds were cracking at the \"Y\" section where fuel flows split. Three had already failed. A cracked fuel manifold could leak fuel, potentially causing engine failure or fire. This AD adopts an emergency safety order from the US Federal Aviation Administration (FAA) to prevent catastrophic failures.\n\n**Who must comply:** Anyone operating aircraft with these specific GE engines in Australia. They must replace over-used manifolds within 100 flight cycles of receiving this directive.\n\n**Key deadline:** If your manifold has exceeded 2,500 cycles, you have 100 cycles to replace it."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The AD implements the FAA Emergency Telegraphic Airworthiness Directive T85-15-51 for the same engine models and the same manifold part numbers. The Schedule entry adopts the FAA TAD as the requirement and does not expand the listed applicability or remedies beyond the FAA directive (Requirement; Compliance; Background)."},"complexity_factors":["Narrow technical applicability: limited to GE CF6-80A and -80A2 engines and two specific manifold part numbers (Applicability; Background).","Short, explicit numerical limits and deadlines: 2500-cycle life limit and 100-cycle replacement window (Background).","Reliance on an external requirement document (FAA TAD No. T85-15-51) for procedural detail and compliance steps (Requirement; Compliance).","Operational and logistical considerations implied by the replacement mandate: tracking cycle counts, scheduling maintenance, and obtaining replacement parts (Background)."],"plain_english_summary":"This AD adopts FAA TAD T85-15-51 and imposes a firm 2,500-cycle life limit on fuel supply manifolds (P/Ns 9327M46G01, 9327M46G02) for GE CF6-80A and CF6-80A2 engines, requiring any manifolds already over 2,500 cycles to be replaced within 100 cycles of the TAD. Operators must track cycles, source replacements, and bear the associated maintenance and logistics costs."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cf6-5-fuel-supply-manifold","history":"/api/acts/ad-cf6-5-fuel-supply-manifold/history","analysis":"/api/acts/ad-cf6-5-fuel-supply-manifold/analysis","conflicts":"/api/acts/ad-cf6-5-fuel-supply-manifold/conflicts","importantCases":"/api/acts/ad-cf6-5-fuel-supply-manifold/important-cases","documents":"/api/acts/ad-cf6-5-fuel-supply-manifold/documents"}}