{"id":"F2006B02560","name":"AD/ATF3/3 - H.P. Turbine Rotor Assembly P/No. 3001766-7","slug":"ad-atf3-3-h-p-turbine-rotor-assembly-p-no-3001766-7","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41816,"registerId":"commonwealth-F2006B02560-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/ATF3/3 - H.P. Turbine Rotor Assembly P/No. 3001766-7","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 \\- ATF3 Series\n\nAD/ATF3/3 H.P. Turbine Rotor Assembly P/No. 3001766-7 8/86\n\nApplicability: ATF3-6-2C, \\-6-4C, \\-6A-3C and \\-6A-4C engines with H.P. turbine rotor assemblies whose serial numbers are listed in the Requirement Document.\n\nRequirement: Inspect H.P. turbine rotor assemblies in accordance with G.T.E.C. S.B. ATF3-72-6070.\n\nCompliance: Unless already accomplished, at the next removal of H.P. turbine rotor assembly but not later than the next periodic inspection that provides access to the H.P. turbine rotor assembly after 31 August 1986.\n\nBackground: The manufacturer has identified H.P. turbine rotor assemblies by serial number which may be susceptible to cracking in the curvic area of the disc.\n\nThis Directive is issued to inspect those suspect rotor assemblies.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1581},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope focused solely on inspecting specific H.P. turbine rotor assemblies (P/No. 3001766-7) in identified ATF3 engine models for cracking defects. No expansion of scope is evident."},"complexity_factors":["Single specific requirement with clear compliance trigger","External reference to manufacturer service bulletin (G.T.E.C. S.B. ATF3-72-6070) containing detailed inspection procedures","External serial number list in 'Requirement Document' not reproduced in the directive text","Minimal conditional logic (simple 'unless already accomplished' clause)","Technical aviation terminology requires specialized knowledge to interpret fully"],"plain_english_summary":"This airworthiness order mandates inspections of AlliedSignal (Garrett/AiResearch) ATF3-6-2C, ATF3-6-4C, ATF3-6A-3C and ATF3-6A-4C engines’ high‑pressure turbine rotor assemblies for curvic‑area cracks, carried out per Service Bulletin ATF3‑72‑6070. It applies to operators of engines with the listed rotor part/serial numbers; inspections must be done at the next removal or scheduled access (and in no event later than 31 August 1986) to prevent catastrophic engine failure."}},"importantCases":[],"_links":{"self":"/api/acts/ad-atf3-3-h-p-turbine-rotor-assembly-p-no-3001766-7","history":"/api/acts/ad-atf3-3-h-p-turbine-rotor-assembly-p-no-3001766-7/history","analysis":"/api/acts/ad-atf3-3-h-p-turbine-rotor-assembly-p-no-3001766-7/analysis","conflicts":"/api/acts/ad-atf3-3-h-p-turbine-rotor-assembly-p-no-3001766-7/conflicts","importantCases":"/api/acts/ad-atf3-3-h-p-turbine-rotor-assembly-p-no-3001766-7/important-cases","documents":"/api/acts/ad-atf3-3-h-p-turbine-rotor-assembly-p-no-3001766-7/documents"}}