{"id":"F2006B08687","name":"AD/CT7/3 - Compressor Modification, Power Lever Control Adjustment And Engine Inspection Procedure","slug":"ad-ct7-3-compressor-modification-power-lever-control-adjustment-and-engine-inspection-procedure","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":51841,"registerId":"commonwealth-F2006B08687-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CT7/3 - Compressor Modification, Power Lever Control Adjustment And Engine Inspection Procedure","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 - CT7 Series\n\n \n\n# AD/CT7/3 Compressor Modification, Power Lever Control Adjustment And Engine Inspection Procedure\n\nApplicability: CT7-5A, -5A1, -7, -7A, -7E, -7E1 engines.\n\n \n\nRequirement: Action in accordance with Swedish Airworthiness Directive SAD No. 1-003.\n\n \n\nSaab-Scania AB SB SF340-72-003.\n\n \n\nGeneral Electric SB (CT7-TP) 72-35 Rev 1. General Electric OEB No. 4 Rev 1.\n\n# 9/85\n\nCompliance: As detailed in the Requirement Documents.\n\n \n\nBackground:  This Directive has been raised to require compliance with General Electric SB (CT7- TP) 72-35R1 and General Electric OEB No. 4 Rev 1. The documents detail modifications to the compressor, adjustment of the engine controls and repetitive inspection procedures which are required following investigation of a series of compressor failures experienced by CT7 engines fitted to SF340 aircraft.\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":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1704},"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This appears to be the original 1985 directive. The scope remains precisely targeted at addressing the identified compressor failure issue in CT7 engines through the specified modifications and inspections, with no evidence of expansion beyond this original safety purpose."},"complexity_factors":["Delegates all technical requirements to external manufacturer documents without reproducing them","Requires cross-referencing four separate external standards (Swedish AD, Saab Service Bulletin, GE Service Bulletin, and GE Operations Engineering Bulletin)","Technical aviation terminology (e.g., 'compressor modification', 'power lever control') assumes specialized knowledge","Specific engine model variants listed in applicability require technical expertise to identify affected aircraft"],"plain_english_summary":"This Airworthiness Directive is a mandatory safety order for operators of specific aircraft engines.\n\n**What it covers**\n- Applies to General Electric CT7-5A, -5A1, -7, -7A, -7E, and -7E1 turbine engines (typically fitted to Saab 340 aircraft)\n\n**What operators must do**\n- Modify the engine compressor\n- Adjust the power lever controls  \n- Perform repetitive inspections\n- Follow the technical instructions in General Electric Service Bulletin (CT7-TP) 72-35 Revision 1 and Operations Engineering Bulletin No. 4 Revision 1\n\n**Why this matters**\nThe directive was issued after investigations revealed a pattern of compressor failures in these engines. The required modifications and inspections prevent engine failures that could endanger flight safety.\n\nCompliance deadlines are set out in the referenced technical documents."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ct7-3-compressor-modification-power-lever-control-adjustment-and-engine-inspection-procedure","history":"/api/acts/ad-ct7-3-compressor-modification-power-lever-control-adjustment-and-engine-inspection-procedure/history","analysis":"/api/acts/ad-ct7-3-compressor-modification-power-lever-control-adjustment-and-engine-inspection-procedure/analysis","conflicts":"/api/acts/ad-ct7-3-compressor-modification-power-lever-control-adjustment-and-engine-inspection-procedure/conflicts","importantCases":"/api/acts/ad-ct7-3-compressor-modification-power-lever-control-adjustment-and-engine-inspection-procedure/important-cases","documents":"/api/acts/ad-ct7-3-compressor-modification-power-lever-control-adjustment-and-engine-inspection-procedure/documents"}}