{"id":"F2006B02311","name":"AD/ALF/15 - Fuel Manifold Inspections","slug":"ad-alf-15-fuel-manifold-inspections","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41541,"registerId":"commonwealth-F2006B02311-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/ALF/15 - Fuel Manifold Inspections","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 (Lycoming) Turbine Engines \\- ALF502 and LF507 Series\n\nAD/ALF/15 Fuel Manifold Inspections 9/97\n\nApplicability: All AlliedSignal ALF502 and LF507 series engines incorporating a fuel manifold listed in AlliedSignal Service Bulletin ALF/LF 73-1002.\n\nRequirement: Inspect affected fuel manifold assemblies in accordance with AlliedSignal Service Bulletin ALF/LF 73-1002.\n\nReplacement of both L.H. and R.H. fuel manifolds with the improved manifold assemblies, P/No 2-163-620-37, and \\-38, constitutes terminating action for this Directive.\n\nNote 1: Compliance with later issues of the referenced service bulletin satisfies the intent of this Directive.\n\nNote 2: FAA AD 97-11-05 also refers.\n\nCompliance: As detailed in the requirement document.\n\nThis directive becomes effective on 14 August 1997.\n\nBackground: This directive is issued following reports of cracking of the fuel manifold assembly which has lead to fuel leaks and a potential for in-flight fires.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1852},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive remains precisely targeted at its original purpose: rectifying a specific mechanical defect (cracking fuel manifolds) in specific engine models to prevent catastrophic failures. There is no indication of scope expansion beyond this discrete airworthiness safety issue."},"complexity_factors":["Single, unambiguous technical requirement referencing an external service bulletin","Narrow applicability limited to specific engine series (ALF502 and LF507)","Clear terminating action specified (replacement with specific part numbers)","No nested exceptions, conditional logic, or alternative compliance pathways","Brief document with straightforward safety purpose"],"plain_english_summary":"This is a mandatory safety order for aircraft operators using specific AlliedSignal (Lycoming) turbine engines (models ALF502 and LF507). **What it requires:** Owners must inspect the fuel manifolds—metal components that deliver fuel to the engine—on these specific engine models. **Why it's needed:** Reports showed these manifolds were developing cracks that caused fuel leaks, creating a serious risk of in-flight fires. **How to comply:** Follow the technical inspection steps outlined in AlliedSignal Service Bulletin ALF/LF 73-1002. If you replace both the left and right fuel manifolds with the improved parts (part numbers 2-163-620-37 and -38), you permanently satisfy this requirement. **Who it affects:** Any aircraft operator with these engine models that have the affected fuel manifolds installed. Compliance is mandatory to keep the aircraft airworthy."}},"importantCases":[],"_links":{"self":"/api/acts/ad-alf-15-fuel-manifold-inspections","history":"/api/acts/ad-alf-15-fuel-manifold-inspections/history","analysis":"/api/acts/ad-alf-15-fuel-manifold-inspections/analysis","conflicts":"/api/acts/ad-alf-15-fuel-manifold-inspections/conflicts","importantCases":"/api/acts/ad-alf-15-fuel-manifold-inspections/important-cases","documents":"/api/acts/ad-alf-15-fuel-manifold-inspections/documents"}}