{"id":"F2006B08011","name":"Airworthiness Directives 2004 - Revocation and Remaking - Rolls Royce Turbine Engines - Tay Series","slug":"airworthiness-directives-2004-revocation-and-remaking-rolls-royce-turbine-engines-tay-series","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115074,"registerId":"commonwealth-F2006B08011-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"Airworthiness Directives 2004 - Revocation and Remaking - Rolls Royce Turbine Engines - Tay Series","content":"Airworthiness Directives 2004\n\nI, DAVID ALAN VILLIERS, delegate of the Civil Aviation Safety\n\nAuthority, acting under subregulation 39.001 (1) of the Civil\n\nAviation Safety Regulations 1998:\n\n(a) revoke the Airworthiness Directives mentioned in\n\nSchedule 1; and\n\n(b) make, as separate instruments, each Airworthiness\n\nDirective mentioned in Schedule 1 and attached.\n\n![](image.001.png)\n\nDavid Villiers\n\nDelegate of the Civil Aviation Safety Authority\n\n20 December 2004\n\nNote: Each attached Airworthiness Directive is being re-made in exactly the\n\nsame form as appears in the latest published edition of the Directive.\n\n  \nSchedule 1 Revocation and Remaking of\n\nAirworthiness Directives\n\nRolls Royce Turbine Engines - Tay Series\n\nAD Name AD Number\n\nLP Compressor Blade Inspection - CANCELLED AD/TAY/1 Amdt 2\n\nFan Blade Root - Inspection AD/TAY/2 Amdt 2\n\nEngine Controls - Emergency Fuel Shut Off System AD/TAY/3 Amdt 1\n\nFuel Flow Regulator Life Limit AD/TAY/4\n\n12th Stage Compressor Disc - Inspection AD/TAY/5 Amdt 2\n\nHPT/HPC Shaft Spline Wear Inspection - CANCELLED AD/TAY/6\n\nLPT Disc Corrosion - Inspection AD/TAY/7\n\nEngine LP Fuel Tube AD/TAY/8 Amdt 1\n\nUltrasonic Inspection of LP Compressor Rotor Blades AD/TAY/9\n\nLPC - Ice Impact Panels - CANCELLED AD/TAY/10 Amdt 1\n\nLow Pressure Compressor - Ice Impact Panels - CANCELLED AD/TAY/11\n\nLow Pressure Compressor Ice Impact Panels AD/TAY/12 Amdt 2\n\nFront Fuel Cut-off Ring AD/TAY/13\n\nFuel Cut-off Ring AD/TAY/14","sortOrder":0}],"analysis":{"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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This instrument performs a purely administrative function. The scope remains exactly as intended: maintaining the existing airworthiness requirements for Rolls Royce Tay engines while updating their legal form. There is no expansion beyond the original purpose of ensuring aviation safety for this specific engine type."},"complexity_factors":["Very short instrument (under 500 words)","Only 1 defined term implicitly used (subregulation reference)","No conditional logic or nested exceptions","Simple two-step structure: (a) revoke, (b) remake","Schedule 1 is a straightforward table listing 14 ADs with minimal detail","No cross-references to other legislation beyond the enabling regulation (CASR 1998)","Purpose is purely administrative — no substantive safety changes"],"plain_english_summary":"This instrument formally revokes 14 existing Airworthiness Directives for Rolls‑Royce Tay series turbine engines and immediately remakes the same ADs as new, separate legal instruments, preserving the original safety requirements while changing their legal structure. Three of the listed ADs are simply cancelled and not remade. It affects airlines, operators and maintenance engineers responsible for keeping these engines airworthy."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Scope unchanged: the instrument expressly revokes the listed ADs and re‑issues them in their latest published form, so obligations on operators/maintainers remain the same (see Schedule 1 and the Note). The measure is procedural—it does not introduce new substantive requirements."},"complexity_factors":["Administrative revocation and re‑issuance mechanism rather than substantive amendment (Note: “re‑made in exactly the same form”)","Multiple individual ADs listed for repeal and remaking, increasing transactional steps (Schedule 1)","Some entries flagged as CANCELLED, requiring attention to current operative status (Schedule 1)","Action taken under delegated power (subregulation 39.001(1)), so reliance on delegated decision‑making","Attachments/cross‑reference to the latest published editions create dependency on external published texts"],"plain_english_summary":"This instrument revokes a list of Airworthiness Directives for Rolls‑Royce Tay‑series turbine engines and re‑issues each AD as a separate instrument in the same form as the latest published edition. Made under subregulation 39.001(1) of the Civil Aviation Safety Regulations, it keeps the existing inspection and maintenance requirements in force. The immediate practical effect falls on aircraft operators, owners and maintenance organisations who must continue to comply with the same AD obligations; the change is administrative rather than substantive."}},"importantCases":[],"_links":{"self":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-rolls-royce-turbine-engines-tay-series","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-rolls-royce-turbine-engines-tay-series/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-rolls-royce-turbine-engines-tay-series/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-rolls-royce-turbine-engines-tay-series/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-rolls-royce-turbine-engines-tay-series/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-rolls-royce-turbine-engines-tay-series/documents"}}