{"id":"F2006B08012","name":"Airworthiness Directives 2004 - Revocation and Remaking - Rolls Royce Turbine Engines - Viper Series","slug":"airworthiness-directives-2004-revocation-and-remaking-rolls-royce-turbine-engines-viper-series","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115075,"registerId":"commonwealth-F2006B08012-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 - Viper 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 - Viper Series\n\nAD Name AD Number\n\nLife Limits Group 'A' Parts - CANCELLED AD/VIPER/1\n\nLife Limits Group 'A' Parts - CANCELLED AD/VIPER/2\n\nBlow Off Valve Operation Limit AD/VIPER/3\n\nBlow-Off Valve AD/VIPER/4\n\nExhaust Cone Assembly AD/VIPER/5\n\nBlow-Off Valve Operating Limit AD/VIPER/6\n\nOil Tank Drain Valve AD/VIPER/7\n\nOil Tank and Oil Pump Drain Valves AD/VIPER/8\n\nEngine Centre Section AD/VIPER/9","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The legislation explicitly states it is remaking directives \"in exactly the same form\" as previously published. The scope remains identical to the original ADs issued for Rolls Royce Viper engines. No expansion of subject matter or affected parties."},"complexity_factors":["Very short instrument (under 500 words)","Only 1 defined term implicitly used (subregulation reference)","No conditional logic or nested exceptions","Simple binary structure: revoke (a) and remake (b)","Tabular schedule with only 2 columns and 9 rows","No cross-references to other legislation beyond the enabling regulation","Straightforward administrative remaking without substantive amendment"],"plain_english_summary":"This instrument is a housekeeping measure by CASA that revokes and immediately remakes nine existing Airworthiness Directives for Rolls‑Royce Viper engines. It affects aircraft operators, owners, maintenance organisations and pilots using these engines. The directives are reissued in the same form—no change to safety requirements—so the action simply refreshes their legal footing under current regulations and tidies the regulatory record (two of the originals were already cancelled)."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"Scope not changed: the instrument expressly revokes listed ADs and remakes them \"in exactly the same form as appears in the latest published edition\" (see Note). It therefore creates administrative new instruments without altering substantive obligations or the population of affected engines/operators."},"complexity_factors":["Administrative re-issuance of multiple existing instruments (Schedule 1 lists nine ADs).","Delegated decision-making under subregulation 39.001(1) (authority and procedural footing referenced).","Technical subject matter (airworthiness rules tied to specific engine parts) increases stakeholder attention despite no substantive change.","Need to update instrument identifiers and regulatory records when instruments are revoked and remade.","Explicit statement that each AD is re-made \"in exactly the same form\" reduces legal-change complexity but preserves operational compliance requirements."],"plain_english_summary":"This instrument revokes a set of Airworthiness Directives for Rolls Royce Viper turbine engines and remakes each one as a separate instrument in the same form as the latest published edition. It affects owners, operators and maintenance organisations of Viper engines, who retain the same compliance obligations; the delegate, acting under subregulation 39.001(1), implements an administrative re‑issuance rather than a substantive change."}},"importantCases":[],"_links":{"self":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-rolls-royce-turbine-engines-viper-series","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-rolls-royce-turbine-engines-viper-series/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-rolls-royce-turbine-engines-viper-series/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-rolls-royce-turbine-engines-viper-series/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-rolls-royce-turbine-engines-viper-series/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-rolls-royce-turbine-engines-viper-series/documents"}}