{"id":"F2009L03408","name":"AD/TPE 331/51 Amdt 1 - Fuel Manifold Assemblies - CANCELLED","slug":"ad-tpe-331-51-amdt-1-fuel-manifold-assemblies-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":140986,"registerId":"commonwealth-F2009L03408-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AlliedSignal (Garrett/AiResearch) Turbin","sectionType":"division","heading":"AlliedSignal (Garrett/AiResearch) Turbine Engines - TPE 331 Series","content":"### AlliedSignal (Garrett/AiResearch) Turbine Engines - TPE 331 Series\n\n| AD/TPE 331/51 Amdt 1 | Fuel Manifold Assemblies | 10/2009 |\n| -------------------- | ------------------------ | ------- |\n\n| Requirement: | CANCELLED.                                                                                                                                                                         |\n| ------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 24 September 2009.                                                                                                                                         |\n| Background:  | This uniquely Australian AD specified replacement of fuel manifold assemblies in accordance with Alert SB No. A73-7023 or A73-0242 before July 1996. The AD is no longer required. |\n\n![](image.001.png)\n\nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n14 August 2009","sortOrder":0},{"sectionNumber":"AD/TPE 331/51 Amdt 1","sectionType":"part","heading":"AD/TPE 331/51 Amdt 1","content":"## AD/TPE 331/51 Amdt 1","sortOrder":1},{"sectionNumber":"Fuel Manifold Assemblies","sectionType":"part","heading":"Fuel Manifold Assemblies","content":"## Fuel Manifold Assemblies","sortOrder":2},{"sectionNumber":"10/2009","sectionType":"part","heading":"10/2009","content":"## 10/2009","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1870},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":true,"description":"The amendment completely eliminates the legislative scope. The original AD imposed mandatory maintenance requirements (replacement of fuel manifold assemblies per specific service bulletins by July 1996). Amendment 1 cancels the entire directive, reducing the scope from a positive safety obligation to nil—imposing no requirements on operators."},"complexity_factors":["Single operative provision (cancellation of the entire instrument)","No definitions, interpretation sections, or defined terms","No conditional logic, exceptions, or cross-references to other legislation","Extremely short length (under 100 words of substantive content)"],"plain_english_summary":"This **Airworthiness Directive (AD)** cancels a previous safety rule for specific aircraft engines.\n\n**Who it affects**\nOwners and operators of aircraft powered by **AlliedSignal (Garrett/AiResearch) TPE 331 series turbine engines** (common in turboprop aircraft like King Airs and Conquests).\n\n**What it does**\nThis document officially **cancels** the previous directive AD/TPE 331/51 as of 24 September 2009. The original rule required replacement of fuel manifold assemblies—components that deliver fuel to the engine—according to specific manufacturer service bulletins (Alert SB No. A73-7023 or A73-0242) before July 1996.\n\n**Why it matters**\nOperators of these engines are **no longer legally required** to perform this specific maintenance. The Civil Aviation Safety Authority has determined the replacement requirement is no longer necessary for flight safety, removing a compliance burden for aircraft owners."}},"importantCases":[],"_links":{"self":"/api/acts/ad-tpe-331-51-amdt-1-fuel-manifold-assemblies-cancelled","history":"/api/acts/ad-tpe-331-51-amdt-1-fuel-manifold-assemblies-cancelled/history","analysis":"/api/acts/ad-tpe-331-51-amdt-1-fuel-manifold-assemblies-cancelled/analysis","conflicts":"/api/acts/ad-tpe-331-51-amdt-1-fuel-manifold-assemblies-cancelled/conflicts","importantCases":"/api/acts/ad-tpe-331-51-amdt-1-fuel-manifold-assemblies-cancelled/important-cases","documents":"/api/acts/ad-tpe-331-51-amdt-1-fuel-manifold-assemblies-cancelled/documents"}}