{"id":"F2006B07461","name":"AD/TPE 331/5 - Fuel Nozzle and Manifold Assembly - Replacement","slug":"ad-tpe-331-5-fuel-nozzle-and-manifold-assembly-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":49821,"registerId":"commonwealth-F2006B07461-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/TPE 331/5 - Fuel Nozzle and Manifold Assembly - Replacement","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)  AlliedSignal (Garrett/AiResearch) Turbine Engines - TPE 331 Series\n\n \n\nAD/TPE 331/5 Fuel Nozzle and Manifold Assembly - Replacement 3/86\n\nApplicability: TPE-331-25A, -25B, -25D, -25F and -29A engines. Requirement:  AiResearch TPE-331 SB No. 9; or\n\nAD/AIR-T/2.\n\n \n\nCompliance: Forthwith.\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 \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2104},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive maintains its original narrow technical scope as a specific safety mandate targeting identified engine models. There is no indication of expansion beyond the original fuel system safety issue."},"complexity_factors":["Extremely short operative text (under 60 words)","No defined terms, interpretation clauses, or schedules","Single unconditional compliance requirement with no exceptions or nested conditions","Only two external references (to a service bulletin and another directive)","Binary applicability test based solely on engine model numbers"],"plain_english_summary":"This **Airworthiness Directive** (a mandatory safety notice from the aviation regulator) requires immediate replacement of fuel nozzles and manifold assemblies on specific aircraft turbine engines to prevent engine failure or fire.\n\n**Who is affected:**\nOwners and operators of aircraft powered by AlliedSignal (Garrett/AiResearch) **TPE-331-25A, -25B, -25D, -25F, or -29A** engines.\n\n**What you must do:**\nReplace the fuel nozzle and manifold assembly in accordance with either:\n* **AiResearch Service Bulletin TPE-331 No. 9**, or\n* **Airworthiness Directive AD/AIR-T/2**.\n\n**When:**\n**Immediately** ('forthwith'). This means compliance is required as soon as practically possible with no grace period.\n\n**Why it matters:**\nFaulty fuel nozzles or manifolds can cause catastrophic engine failure or in-flight fires. This directive forces the replacement of potentially defective parts before they cause accidents."}},"importantCases":[],"_links":{"self":"/api/acts/ad-tpe-331-5-fuel-nozzle-and-manifold-assembly-replacement","history":"/api/acts/ad-tpe-331-5-fuel-nozzle-and-manifold-assembly-replacement/history","analysis":"/api/acts/ad-tpe-331-5-fuel-nozzle-and-manifold-assembly-replacement/analysis","conflicts":"/api/acts/ad-tpe-331-5-fuel-nozzle-and-manifold-assembly-replacement/conflicts","importantCases":"/api/acts/ad-tpe-331-5-fuel-nozzle-and-manifold-assembly-replacement/important-cases","documents":"/api/acts/ad-tpe-331-5-fuel-nozzle-and-manifold-assembly-replacement/documents"}}