{"id":"F2007L01588","name":"AD/TAY/9 - Ultrasonic Inspection of LP Compressor Rotor Blades - CANCELLED","slug":"ad-tay-9-ultrasonic-inspection-of-lp-compressor-rotor-blades-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":66140,"registerId":"commonwealth-F2007L01588-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/TAY/9 - Ultrasonic Inspection of LP Compressor Rotor Blades - CANCELLED","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 20.2\ntitle: AIRCRAFT\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\n \n\nAIRWORTHINESS DIRECTIVE\n\nOn the effective date specified below, and for the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive AD/TAY/9.\n\n### Rolls Royce Turbine Engines - Tay Series\n\n| AD/TAY/9 | Ultrasonic Inspection of LP  Compressor Rotor Blades | 7/2007 |\n| --- | --- | --- |\n\n\n \n\n| Requirement: | CANCELLED. |\n| --- | --- |\n|  | This AD is cancelled on 5 July 2007. |\n| Background: | This AD has been superseded by AD/TAY/19. |\n\n\n![](image.001.png)\n\nCharles Lenarcic  Delegate of the Civil Aviation Safety Authority\n\n25 May 2007\n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1432},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"The instrument operates solely to revoke a previous directive without expanding the regulatory scope or creating new obligations."},"complexity_factors":["Single operative provision (cancellation only)","No defined terms or interpretation section","No conditional logic or procedural requirements","Minimal cross-referencing (only to superseding directive AD/TAY/19)"],"plain_english_summary":"**What this does**\n\nThis document officially cancels a previous safety rule (Airworthiness Directive AD/TAY/9) that required ultrasonic inspection of low-pressure compressor rotor blades on Rolls-Royce Tay series turbine engines.\n\n**Who it affects**\n\nAircraft operators and maintenance organisations using Rolls-Royce Tay engines, particularly those responsible for engine maintenance and airworthiness compliance.\n\n**Why it matters**\n\nThe old inspection requirement is no longer necessary because it has been replaced by a newer, updated safety rule (AD/TAY/19). This cancellation simplifies compliance by removing the outdated requirement and directing operators to follow the current standard instead.\n\n**Effective date**\n\nThe cancellation took effect on 5 July 2007."}},"importantCases":[],"_links":{"self":"/api/acts/ad-tay-9-ultrasonic-inspection-of-lp-compressor-rotor-blades-cancelled","history":"/api/acts/ad-tay-9-ultrasonic-inspection-of-lp-compressor-rotor-blades-cancelled/history","analysis":"/api/acts/ad-tay-9-ultrasonic-inspection-of-lp-compressor-rotor-blades-cancelled/analysis","conflicts":"/api/acts/ad-tay-9-ultrasonic-inspection-of-lp-compressor-rotor-blades-cancelled/conflicts","importantCases":"/api/acts/ad-tay-9-ultrasonic-inspection-of-lp-compressor-rotor-blades-cancelled/important-cases","documents":"/api/acts/ad-tay-9-ultrasonic-inspection-of-lp-compressor-rotor-blades-cancelled/documents"}}