{"id":"F2006B08487","name":"AD/CF6/49 - High Pressure Compressor 3-9 Spool - Inspection","slug":"ad-cf6-49-high-pressure-compressor-3-9-spool-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":51174,"registerId":"commonwealth-F2006B08487-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.001.png)\n\n![](image.001.png)  \nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.\n\nGeneral Electric Turbine Engines \\- CF6 Series","sortOrder":0},{"sectionNumber":"AD/CF6/49 High Pressure Compressor 3-9 S","sectionType":"part","heading":"AD/CF6/49 High Pressure Compressor 3-9 Spool - Inspection 3/2003","content":"# AD/CF6/49 High Pressure Compressor 3-9 Spool \\- Inspection 3/2003\n\nApplicability: General Electric CF6-45/50/80A/80C2/80E1 series engines as identified in FAA AD 2002-25-08.\n\nRequirement: Carry out the initial inspection and repetitive inspections per the requirements of FAA AD 2002-25-08.\n\nNote: FAA AD 2002-25-08 Amdt 39-12984 refers. This Directive supersedes AD/CF6/41 Amdt 1 (FAA AD 99-24-15) and AD/CF6/43 Amdt 1 (FAA AD 2000-16-\n\n12).\n\nCompliance: As detailed in the Requirement document with a revised effective date of this Directive.\n\nThis Airworthiness Directive becomes effective on 20 March 2003.\n\nBackground: This Directive harmonises the additional inspection requirements contained in two earlier Directives. These additional inspections, derived from service experience, help to prevent uncontained engine failures.\n\n![Signature of James Coyne Delegate of the Civil Aviation Safety Authority](image.002.png)  \n\nJames Coyne\n\nDelegate of the Civil Aviation Safety Authority 29 January 2003\n\n![](image.001.png)","sortOrder":1}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This directive maintains its original narrow scope. It is a harmonisation directive that consolidates two previous ADs without expanding beyond the specific engine component inspection purpose. The scope remains tightly focused on CF6 engine High Pressure Compressor spool inspections as originally intended."},"complexity_factors":["Short, single-purpose directive (approximately 250 words)","Only 1 defined applicability criterion (engine series identification)","Heavy reliance on external document (FAA AD 2002-25-08) for actual inspection procedures — the Australian directive itself contains no technical detail","Simple structure: Applicability → Requirement → Compliance → Background","No nested exceptions or conditional logic within the directive text itself","Cross-references to 2 superseded directives and 1 FAA directive, but no complex internal cross-referencing"],"plain_english_summary":"This mandatory CASA Airworthiness Directive requires owners/operators of specified General Electric CF6 engines to perform initial and recurring inspections of the High Pressure Compressor 3-9 spool, following the procedures in FAA AD 2002-25-08. It affects airlines and maintenance organisations using CF6-45/50/80A/80C2/80E1 engines and aims to prevent uncontained engine failures. The AD consolidated and replaced two earlier directives and became effective 20 March 2003."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"Yes. The Directive harmonises additional inspection requirements from two earlier ADs and expressly supersedes AD/CF6/41 and AD/CF6/43, aligning Australian obligations with FAA AD 2002-25-08 for the listed CF6 engine models (Background; Applicability; Requirement). This replaces the prior separate directives with a single, referenced inspection regime."},"complexity_factors":["Cross-reference to an external instrument (FAA AD 2002-25-08) for procedures and timing (Applicability; Requirement) — requires users to consult and apply another jurisdiction's AD.","Supersedes and harmonises two earlier ADs (AD/CF6/41 and AD/CF6/43) (Background) — operators must reconcile prior obligations with the new unified regime.","Compliance details are delegated to the referenced FAA AD and a separate Requirement document (Requirement; Compliance) — introduces potential ambiguity unless the FAA document is consulted.","Applicability limited to multiple CF6 engine models (Applicability) — operators must determine fleet exposure precisely.","Direct operational and administrative burdens on operators (inspection execution, downtime, recordkeeping) implied by mandatory initial and repetitive inspections (Requirement; Compliance).","Delegated administrative enforcement: CASA delegate issues the AD under CAR 1998 subreg 39.1(1) (intro/signature) — administrative discretion in issuing ADs is present."],"plain_english_summary":"This Airworthiness Directive requires operators of specified General Electric CF6-45/50/80 series engines to perform an initial and recurring inspection of the high‑pressure compressor 3–9 spool using the procedures and intervals set out in FAA AD 2002-25-08. It harmonises and replaces two earlier Australian ADs and takes effect on 20 March 2003. Operators bear the inspection costs and must schedule compliance to the referenced FAA AD; CASA enforces the requirement under CAR 1998 subreg 39.1(1)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cf6-49-high-pressure-compressor-3-9-spool-inspection","history":"/api/acts/ad-cf6-49-high-pressure-compressor-3-9-spool-inspection/history","analysis":"/api/acts/ad-cf6-49-high-pressure-compressor-3-9-spool-inspection/analysis","conflicts":"/api/acts/ad-cf6-49-high-pressure-compressor-3-9-spool-inspection/conflicts","importantCases":"/api/acts/ad-cf6-49-high-pressure-compressor-3-9-spool-inspection/important-cases","documents":"/api/acts/ad-cf6-49-high-pressure-compressor-3-9-spool-inspection/documents"}}