{"id":"F2006B08506","name":"AD/CF700/2 - No. 1 Bearing","slug":"ad-cf700-2-no-1-bearing","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":51224,"registerId":"commonwealth-F2006B08506-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CF700/2 - No. 1 Bearing","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/CF700/2 No. 1 Bearing 9/85\n\nApplicability: CF700-2C with S/Nos. 245-001 to 245-429 and CF700-2D with S/Nos. 299-001 to 299-102.\n\n \n\nDocument: General Electric SB (CF700) 72-76); or\n\n \n\nAD/GE-T/6B.\n\n \n\nCompliance: Before installation in an aircraft following next overhaul completed after 31 May 1971.\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":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"Based on the instrument text provided, the scope remains as originally set: it applies only to CF700-2C engines with S/N 245-001 to 245-429 and CF700-2D engines with S/N 299-001 to 299-102 (Applicability), requires compliance with the named GE service bulletin or AD (Document), and fixes timing to installation after the next overhaul completed after 31 May 1971 (Compliance). There is no language in the text that expands or narrows that scope beyond those elements."},"complexity_factors":["Very narrow applicability limited to two engine types and explicit serial-number ranges (Applicability).","Compliance is triggered by a specific operational event (installation after an overhaul completed after 31 May 1971), requiring record verification (Compliance).","Technical work is specified by reference to external documents (General Electric SB CF700 72-76 or AD/GE-T/6B), creating dependency on those texts (Document).","Low regulatory discretion within the instrument itself—prescriptive requirement rather than a principles-based standard (PART 39; Compliance).","Historic date-based trigger may complicate interpretation if records are unclear or if applying the directive retrospectively (Compliance)."],"plain_english_summary":"This airworthiness directive requires owners/operators and maintenance organisations of GE CF700-2C (S/N 245‑001 to 245‑429) and CF700-2D (S/N 299‑001 to 299‑102) engines to carry out the work in GE Service Bulletin CF700 72‑76 or AD/GE‑T/6B. The mandated actions—intended to address a No.1 bearing airworthiness issue—must be completed before reinstalling an engine after any overhaul finished after 31 May 1971; costs fall to operators/maintainers."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive focused on a specific bearing in specific engine models. It has not expanded beyond its original safety purpose."},"complexity_factors":["Very short document (approximately 150 words of substantive content)","Only 2 defined applicability criteria (engine models and serial number ranges)","Single compliance requirement with clear deadline","No nested exceptions or conditional logic","Simple cross-reference to one alternative compliance document (AD/GE-T/6B)","Straightforward temporal trigger ('next overhaul completed after 31 May 1971')"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations 1998.\n\n**What it does:** It requires specific maintenance action on a particular aircraft engine part — the **No. 1 Bearing** in General Electric CF700 series turbine engines.\n\n**Who it affects:**\n- **Engine models:** CF700-2C (serial numbers 245-001 through 245-429) and CF700-2D (serial numbers 299-001 through 299-102)\n- **Operators:** Anyone operating aircraft with these specific engines in Australia\n\n**What must be done:** Before installing one of these engines into an aircraft, operators must ensure the No. 1 Bearing has been inspected or modified according to General Electric Service Bulletin 72-76 (or alternatively, comply with a related US directive AD/GE-T/6B).\n\n**When:** This must happen **before installation** following the engine's **next overhaul completed after 31 May 1971**.\n\n**Why it matters:** Airworthiness Directives are legally enforceable safety mandates. They typically address known defects, failures, or unsafe conditions that could affect flight safety. Non-compliance means the engine cannot legally be installed on an Australian-registered aircraft."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cf700-2-no-1-bearing","history":"/api/acts/ad-cf700-2-no-1-bearing/history","analysis":"/api/acts/ad-cf700-2-no-1-bearing/analysis","conflicts":"/api/acts/ad-cf700-2-no-1-bearing/conflicts","importantCases":"/api/acts/ad-cf700-2-no-1-bearing/important-cases","documents":"/api/acts/ad-cf700-2-no-1-bearing/documents"}}