{"id":"F2006B08500","name":"AD/CF700/11 - Improved Combustion Liner Rivets","slug":"ad-cf700-11-improved-combustion-liner-rivets","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":51208,"registerId":"commonwealth-F2006B08500-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CF700/11 - Improved Combustion Liner Rivets","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/CF700/11 Improved Combustion Liner Rivets 9/85\n\nApplicability: All CF700-2C engines with S/Nos. prior to 24532. CF700-2D engines with S/Nos. prior to 299133. CF700-2D-2 engines with S/Nos. prior to 304096.\n\n \n\nDocument: General Electric SB (CF700) 72-108, Rev. 1; or AD/GE-T/24.\n\nCompliance: Before installation in an aircraft following next hot section inspection or following next reconditioning whichever occurs first.\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":{"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 specific engine models. It has not expanded beyond its original narrow technical purpose."},"complexity_factors":["Very short document (under 200 words)","Only 3 defined applicability criteria (engine models and serial number ranges)","Single compliance trigger with simple 'whichever occurs first' logic","No cross-references to other legislation beyond one alternative technical document","No exceptions, exemptions, or conditional provisions","Straightforward mechanical instruction with clear technical reference"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA).\n\n**What it does:**\nIt requires owners and operators of specific General Electric CF700 series jet engines to install improved rivets in the combustion liner (a critical part of the engine where fuel burns). The old rivets apparently had a safety issue, so they must be replaced with better ones.\n\n**Who it affects:**\nAnyone operating aircraft with these specific engine models and serial numbers:\n- **CF700-2C** engines with serial numbers below 24532\n- **CF700-2D** engines with serial numbers below 299133  \n- **CF700-2D-2** engines with serial numbers below 304096\n\n**When you must comply:**\nBefore installing the engine back into an aircraft after either:\n- The next \"hot section inspection\" (a major engine overhaul looking at the hot parts), OR\n- The next reconditioning (general refurbishment)\n\n**Why it matters:**\nCombustion liner rivets failing could cause engine damage, power loss, or worse. This directive prevents that by forcing an upgrade during routine maintenance. Ignoring it means you can't legally fly that engine in Australia.\n\n**The technical details:**\nThe work must follow General Electric Service Bulletin 72-108 (Revision 1) or an older equivalent directive AD/GE-T/24."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument specifies a targeted modification for engines meeting the listed serial-number ranges and prescribes compliance by reference to the named GE service bulletin or alternative AD. The text contains no indication that the scope of the requirement was altered from an earlier requirement within this document; no evidence in the supplied text indicates a change from prior intent."},"complexity_factors":["Narrow applicability limited to three engine model/type and serial-number cut-offs (straightforward identification). (Applicability)","Compliance depends on an external technical document (GE Service Bulletin 72-108 Rev.1 or AD/GE-T/24), adding one layer of cross-reference. (Document)","Timing condition is conditional (before next installation after either next hot section inspection or next reconditioning), requiring scheduling coordination but not continual monitoring. (Compliance)","No multiple-step, phased implementation or recurring inspection intervals specified in the AD text itself — single mandatory modification tied to maintenance events reduces procedural complexity. (Compliance)"],"plain_english_summary":"This AD requires installation of improved combustion‑liner rivets on certain GE CF700 engines (specific serial‑number cut‑offs) using the procedures and parts in GE Service Bulletin (CF700) 72‑108 Rev.1 or AD/GE‑T/24. Owners/operators and their maintenance organisations must complete the modification before the engine is next installed after a hot‑section inspection or reconditioning. The rule is narrow in scope; affected operators bear parts, labour and scheduling costs."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cf700-11-improved-combustion-liner-rivets","history":"/api/acts/ad-cf700-11-improved-combustion-liner-rivets/history","analysis":"/api/acts/ad-cf700-11-improved-combustion-liner-rivets/analysis","conflicts":"/api/acts/ad-cf700-11-improved-combustion-liner-rivets/conflicts","importantCases":"/api/acts/ad-cf700-11-improved-combustion-liner-rivets/important-cases","documents":"/api/acts/ad-cf700-11-improved-combustion-liner-rivets/documents"}}