{"id":"F2006B08502","name":"AD/CF700/13 - Aft Fan Rotor Blades","slug":"ad-cf700-13-aft-fan-rotor-blades","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":51214,"registerId":"commonwealth-F2006B08502-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CF700/13 - Aft Fan Rotor Blades","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)  General Electric Turbine Engines - CF700 Series\n\n \n\nAD/CF700/13 Aft Fan Rotor Blades 9/85\n\nApplicability: All CF700 model engines fitted with aft fan rotor blades P/N 6002T57P01 with S/Nos. as detailed in SB (CF700) A72-124.\n\n \n\nDocument: 1. General Electric SB (CF700) A72-124; or FAA AD 75-05-13; or\n\nAD/GE-T/31.\n\n \n\nCompliance: 1. Blades with 400 hours or more total time in service on 30 July 1976. Inspect within 30 hours time in service and inspect every 400 hours time in service thereafter.\n\n \n\n2.    Blades with less than 400 hours total time in service on 30 July 1976. Inspect prior to the accumulation of 430 hours total time in service and inspect every 400 hours time in service thereafter.\n\n \n\n3.    Replace all blades confirmed as cracked prior to further flight.\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":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive focused on a specific mechanical defect in a specific engine model. It has not expanded beyond its original purpose of mandating blade inspections."},"complexity_factors":["Very short document (under 300 words)","Only 3 compliance requirements with clear time-based triggers","Single defined part number (P/N 6002T57P01)","No nested exceptions or conditional logic beyond simple hour-count thresholds","Cross-references only to external documents (Service Bulletin and FAA AD) without internal cross-referencing","Plain temporal structure (specific cutoff date of 30 July 1976)"],"plain_english_summary":"This CASA Airworthiness Directive requires owners/operators of General Electric CF700 engines fitted with aft fan rotor blades P/N 6002T57P01 (specified serials in GE Service Bulletin A72‑124) to inspect those blades for cracks on a defined schedule and to replace any cracked blade before further flight. High‑time blades must be inspected within 30 flight hours and then every 400 hours; lower‑time blades before 430 total hours and then every 400 hours. It prevents blade failure that could cause catastrophic engine or aircraft damage."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive text narrowly targets CF700 engines fitted with aft fan rotor blades P/N 6002T57P01 with the serial numbers listed in GE SB A72-124 and sets time-based inspection and replacement requirements. The document does not indicate any expansion or contraction of that applicability compared with the directive's stated scope."},"complexity_factors":["Applicability limited to blades with a specific part number and serial numbers as detailed in the service bulletin (Applicability) — requires operators to identify affected units before action.","Multiple, time-based inspection triggers tied to hours-in-service as of a reference date (30 July 1976) creating two different initial deadlines (Compliance paras 1–2) — scheduling and tracking burden.","Short compliance window for some engines (inspect within 30 hours for blades already ≥400 hours; Compliance 1) — potential for near-term operational disruption.","Recurring inspection interval of every 400 hours TIS after initial inspection (Compliance paras 1–2) — ongoing maintenance and record-keeping cost.","Mandatory replacement before further flight if cracking is detected (Compliance 3) — immediate parts cost, potential unscheduled downtime and operational impact.","Cross-references to external technical documents (GE SB A72-124; FAA AD 75-05-13; AD/GE-T/31) for inspection procedures (Document) — requires access to and reliance on those documents for compliance.","No discretion for operators in outcome of a crack finding (must replace prior to flight; Compliance 3) — deterministic compliance action but operationally consequential.","Safety-critical nature increases scrutiny and enforcement risk despite straightforward technical steps."],"plain_english_summary":"This airworthiness directive requires scheduled inspections of specific aft fan rotor blades (P/N 6002T57P01, serial numbers per GE SB A72-124) on General Electric CF700 engines and mandates removal and replacement of any blade found cracked before further flight. It applies to operators and maintenance organisations that own or service affected CF700 engines and creates recurring inspection obligations and replacement costs to manage the risk of blade failure."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cf700-13-aft-fan-rotor-blades","history":"/api/acts/ad-cf700-13-aft-fan-rotor-blades/history","analysis":"/api/acts/ad-cf700-13-aft-fan-rotor-blades/analysis","conflicts":"/api/acts/ad-cf700-13-aft-fan-rotor-blades/conflicts","importantCases":"/api/acts/ad-cf700-13-aft-fan-rotor-blades/important-cases","documents":"/api/acts/ad-cf700-13-aft-fan-rotor-blades/documents"}}