{"id":"F2006B07264","name":"AD/TAY/3 Amdt 1 - Engine Controls - Emergency Fuel Shut Off System","slug":"ad-tay-3-amdt-1-engine-controls-emergency-fuel-shut-off-system","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":49179,"registerId":"commonwealth-F2006B07264-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/TAY/3 Amdt 1 - Engine Controls - Emergency Fuel Shut Off System","content":"![](image.001.png)\n\nAIRWORTHINESS DIRECTIVE\n\n![](image.001.png)  \n\nFor the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/TAY/3 and issues the following AD under subregulation 39.1 (1) of CASR 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\n![](image.001.png)  \n\nRolls Royce Turbine Engines \\- Tay Series\n\nAD/TAY/3\n\nAmdt 1\n\n  \n\nEngine Controls \\- Emergency Fuel Shut Off System\n\n  \n9/2003\n\nApplicability: Rolls Royce Tay 650-15, 620-15 and 651-54 series engines not incorporating Rolls Royce Service Bulletin (SB) SB76-1466 as indicated in paragraph 1.A. Planning Information of Rolls Royce SB TAY 76-1434, Revision 3, dated 14 September 2001.\n\nRequirement: 1. For installed engines, initially inspect emergency fuel shut-off cable for broken strands in accordance with paragraph 3.A. Accomplishment Instructions of Rolls Royce SB TAY 76-1434, Revision 3, dated 14 September 2001; and\n\n    2. For installed engines, re-inspect, or replace cable, following compliance with Requirement 1, as required by paragraph 3.A. Accomplishment Instructions of Rolls Royce SB TAY 76-1434, Revision 3, dated 14 September 2001.\n\n    3. For engines undergoing shop visit, inspection/check is to be done in accordance with relevant Engine Manual 72-52-35 as required by paragraph 3.A. Accomplishment Instructions of Rolls Royce SB TAY 76-1434, Revision 3, dated 14 September 2001.\n\nNote: CAA (UK) AD 003-03-98 dated 28 May 1998 refers.\n\nCompliance: For Requirement 1: For those engines in compliance with the initial 1,000 hour inspection required by the original issue of this Directive, no initial inspection required. For those engines not in compliance with the initial 1,000 hour inspection required by the original issue of this Directive, within 100 hours time-in-service (TIS) from the effective date of this Directive.\n\nFor Requirement 2: At intervals as required by paragraph 3.A. Accomplishment Instructions of Rolls Royce SB TAY 76-1434, Revision 3, dated 14 September 2001, from when compliance with Requirement 1 carried out.\n\nFor Requirement 3: During shop visit as required by paragraph 3.A. Accomplishment Instructions of Rolls Royce SB TAY 76-1434, Revision 3, dated 14 September 2001 from the effective date of this Directive.\n\nThis Amendment becomes effective on 4 September 2003.\n\nRolls Royce Turbine Engines \\- Tay Series\n\nAD/TAY/3 Amdt 1 (continued)\n\nBackground: A number of worn, frayed and, in one case, broken Emergency Fuel Shut-off Cables have been reported in service. The wear occurs at the aft guide quadrant, which supports the cable and turns it through 90 degrees. Failure of a significant number of strands in the cable could result in the non-operation of the emergency fuel shut-off in the unlikely event of the system being required. This Amendment amends the applicability to reflect the SB effectivity, introduces the latest SB revision, which indicates changes to the accomplishment instruction, and re-writes the presentation.\n\nThe original issue of this Airworthiness Directive became effective on 28 January 1999.\n\n![Signature of Jim Coyne Delegate of the Civil Aviation Safety Authority](image.002.png)  \n\nJim Coyne\n\nDelegate of the Civil Aviation Safety Authority 25 July 2003\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 13 August 2003.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"This amendment narrows and updates the AD’s scope by aligning applicability with SB effectivity (excluding engines that incorporate SB76‑1466) and adopting Rolls‑Royce SB TAY 76‑1434 Revision 3, which changes the accomplishment instructions. The amendment therefore alters which engines are affected and the prescribed inspection/replacement procedures relative to the original AD (Background; Applicability; Requirement)."},"complexity_factors":["Technical subject-matter: inspection and assessment of emergency fuel shut-off cable condition (Requirement; Background).","Reliance on external documents: Rolls‑Royce SB TAY 76‑1434 Revision 3 and relevant Engine Manual 72-52-35 for procedures and intervals (Requirement; Requirement 3).","Conditional compliance timing: different deadlines depending on prior compliance with the original AD’s 1,000‑hour inspection (Compliance).","Multiple applicability qualifiers: limited to specific Tay engine models and excluding engines incorporating SB76‑1466 (Applicability).","Operational timing windows: recurring inspections at SB-specified intervals and mandates during shop visits (Compliance; Requirement 2 & 3).","Regulatory delegation: issued under CASR subreg 39.1(1) by a CASA delegate, creating mandatory compliance obligations for operators (preamble)."],"plain_english_summary":"This AD requires operators of certain Rolls‑Royce Tay 650‑15, 620‑15 and 651‑54 engines (those not incorporating SB76‑1466) to inspect and, if necessary, re‑inspect or replace the emergency fuel shut‑off cable following Rolls‑Royce SB TAY 76‑1434 Revision 3 and the engine manual. Operators/engine owners pay inspection and replacement costs; the CASA delegate issued the directive under CASR subreg 39.1(1). Inspections must occur within 100 hours TIS if the original 1,000‑hour check was not done, then at SB‑specified intervals or during shop visits."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment remains tightly focused on its original purpose — addressing unsafe emergency fuel shut-off cables on specific Rolls-Royce Tay engines. The amendment updates references to the latest service bulletin revision and clarifies applicability, but does not expand beyond the original safety issue."},"complexity_factors":["Multiple cross-references to external Rolls-Royce Service Bulletin (SB TAY 76-1434, Revision 3) for detailed instructions","Conditional compliance deadlines based on whether prior inspection under original directive was completed","Three distinct requirements with different compliance triggers (installed engines initial, installed engines ongoing, shop visit)","Specific engine model numbers and service bulletin incorporation status in applicability section","Reference to UK CAA AD (foreign regulatory cross-reference)"],"plain_english_summary":"This CASA Airworthiness Directive requires inspection and, if needed, replacement of emergency fuel shut-off cables on certain Rolls‑Royce Tay (650‑15, 620‑15, 651‑54) engines due to found fraying and broken strands where cables bend. It affects operators and maintenance organisations (excluding engines already modified per RR SB76‑1466). The rule prevents potential failure to cut fuel in an engine fire or other emergency."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-tay-3-amdt-1-engine-controls-emergency-fuel-shut-off-system","history":"/api/acts/ad-tay-3-amdt-1-engine-controls-emergency-fuel-shut-off-system/history","analysis":"/api/acts/ad-tay-3-amdt-1-engine-controls-emergency-fuel-shut-off-system/analysis","conflicts":"/api/acts/ad-tay-3-amdt-1-engine-controls-emergency-fuel-shut-off-system/conflicts","importantCases":"/api/acts/ad-tay-3-amdt-1-engine-controls-emergency-fuel-shut-off-system/important-cases","documents":"/api/acts/ad-tay-3-amdt-1-engine-controls-emergency-fuel-shut-off-system/documents"}}