{"id":"F2006B07463","name":"AD/TPE 331/51 Amdt 1 - Fuel Manifold Assemblies","slug":"ad-tpe-331-51-amdt-1-fuel-manifold-assemblies","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":49830,"registerId":"commonwealth-F2006B07463-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/TPE 331/51 Amdt 1 - Fuel Manifold Assemblies","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 106 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nAlliedSignal (Garrett/AiResearch) Turbine Engines \\- TPE 331 Series\n\nAD/TPE 331/51\n\nAmdt 1\n\n  \n\nFuel Manifold Assemblies 6/96 DM\n\nApplicability: TPE 331-1,2,3U,5,6 & 14 models as specified in the requirement document.\n\nRequirement: Check and replace, if necessary, the fuel manifold assembly in accordance with AlliedSignal Aerospace Alert Service Bulletin TPE331-A73-7023 or TPE331-A73- 0242 as applicable.\n\nNote: AD/TPE331/43 refers for TPE331-8,10,11 and 12 series engines.\n\nCompliance: Within 50 hours time in service (TIS) from 12 April 1996 or before 1 July 1996 whichever occurs first.\n\nBackground: AlliedSignal has advised that internal cracks in the fuel manifold hose assemblies, caused by a defective manufacturing process by one vendor, have developed leaks.\n\nThe action mandated in this AD is to remove the suspect fuel manifold assemblies and install serviceable parts in accordance with the manufacturer's requirements.\n\nThis amendment extends the range of applicability by including reference to another manufacturer's service bulletin on the same subject.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1542},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":true,"description":"This amendment extends the original directive's scope by incorporating reference to an additional manufacturer service bulletin (TPE331-A73-0242), broadening the approved methods for compliance beyond the original TPE331-A73-7023 reference."},"complexity_factors":["Single, discrete safety mandate with unambiguous technical requirements","Limited applicability restricted to specific engine model numbers","Simple temporal compliance condition (whichever occurs first)","Minimal cross-referencing (only one related AD and two manufacturer bulletins)"],"plain_english_summary":"This airworthiness directive requires operators of AlliedSignal TPE331-1, -2, -3U, -5, -6 and -14 engines to inspect fuel manifold assemblies for internal cracking or leaks and to immediately replace any defective assemblies with manufacturer-approved parts. It responds to a supplier manufacturing defect that can cause fuel leaks and engine fires. Compliance is mandatory within 50 flight hours of 12 April 1996 or before 1 July 1996; the amendment adds a second approved service bulletin as an alternative replacement method."}},"importantCases":[],"_links":{"self":"/api/acts/ad-tpe-331-51-amdt-1-fuel-manifold-assemblies","history":"/api/acts/ad-tpe-331-51-amdt-1-fuel-manifold-assemblies/history","analysis":"/api/acts/ad-tpe-331-51-amdt-1-fuel-manifold-assemblies/analysis","conflicts":"/api/acts/ad-tpe-331-51-amdt-1-fuel-manifold-assemblies/conflicts","importantCases":"/api/acts/ad-tpe-331-51-amdt-1-fuel-manifold-assemblies/important-cases","documents":"/api/acts/ad-tpe-331-51-amdt-1-fuel-manifold-assemblies/documents"}}