{"id":"F2006B08717","name":"AD/DART/30 - Turbine Disc - Coating Removal","slug":"ad-dart-30-turbine-disc-coating-removal","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":51916,"registerId":"commonwealth-F2006B08717-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\nRolls Royce Turbine Engines \\- Dart Series","sortOrder":0},{"sectionNumber":"AD/DART/30 Turbine Disc - Coating Remova","sectionType":"part","heading":"AD/DART/30 Turbine Disc - Coating Removal 4/2003","content":"# AD/DART/30 Turbine Disc \\- Coating Removal 4/2003\n\nApplicability: Rolls Royce Dart Series engines as specified in the requirement document. Requirement: Action per the requirements of Germany (LBA) Airworthiness Directive 2003-015. Compliance: As detailed in the requirement document with revised effective date of this directive.\n\nThis Airworthiness Directive becomes effective on 17 April 2003.\n\nBackground: The Sermetel coating on the turbine disc along with a dry film lubricant used on the disc is found to adversely affect the integrity of the disc. This directive mandates the removal of the coating.\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 5 March 2003\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 26 March 2003.","sortOrder":1}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — addressing a specific material defect in a specific engine series. It does not expand beyond its original safety purpose."},"complexity_factors":["Very short document (approximately 250 words)","Only 2 substantive operative provisions: the requirement to follow German AD 2003-015, and the compliance deadline","No defined terms section — relies entirely on external reference to German LBA directive for technical details","No nested conditions or exceptions","Single cross-reference only (to German LBA AD 2003-015)","Straightforward causal chain: unsafe condition identified → specific remedy mandated → deadline set"],"plain_english_summary":"This mandatory CASA Airworthiness Directive requires removal of the Sermetel coating and a dry-film lubricant from turbine discs on Rolls‑Royce Dart engines because those materials were found to degrade disc integrity and risk engine failure. \n\nIt affects owners, operators and maintenance organisations of affected engines and adopts the technical instructions and compliance deadlines of German LBA AD 2003‑015, now effective 17 April 2003."},"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD implements the removal mandated in the referenced LBA directive for the specified Rolls-Royce Dart engines. The text shows no expansion, narrowing, or additional obligations beyond applying the LBA requirement and setting an effective date."},"complexity_factors":["Narrow technical scope: targets a specific coating and component (Sermetel coating and dry film lubricant on turbine disc).","Cross-reference dependency: compliance is defined by an external instrument—Germany (LBA) Airworthiness Directive 2003-015—so full requirements sit outside this document (Requirement paragraph).","Limited procedural detail in the AD text: the directive delegates detailed instructions to the referenced requirement document, creating reliance on another source for operative steps and standards.","Defined compliance timing: an explicit effective date (17 April 2003) creates a fixed compliance window that operators must meet.","Enforcement and decision authoriser identified: CASA delegate issues and enforces the AD, centralising regulatory discretion in that office (signature block and opening paragraph)."],"plain_english_summary":"Requires removal of the Sermetel coating and a dry-film lubricant from turbine discs on specified Rolls-Royce Dart engines, following the Germany (LBA) Airworthiness Directive 2003-015. It applies to operators and maintenance organisations responsible for those engines and takes effect 17 April 2003. The Civil Aviation Safety Authority (through its delegate) enforces the directive; the operators carry the cost and compliance burden of performing the removal and any associated inspections or maintenance."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dart-30-turbine-disc-coating-removal","history":"/api/acts/ad-dart-30-turbine-disc-coating-removal/history","analysis":"/api/acts/ad-dart-30-turbine-disc-coating-removal/analysis","conflicts":"/api/acts/ad-dart-30-turbine-disc-coating-removal/conflicts","importantCases":"/api/acts/ad-dart-30-turbine-disc-coating-removal/important-cases","documents":"/api/acts/ad-dart-30-turbine-disc-coating-removal/documents"}}