{"id":"F2006B07852","name":"Airworthiness Directives 2004 - Revocation and Remaking - Engines - General","slug":"airworthiness-directives-2004-revocation-and-remaking-engines-general","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":50811,"registerId":"commonwealth-F2006B07852-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"Airworthiness Directives 2004 - Revocation and Remaking - Engines - General","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\nEngines - General\n\nAD Name AD Number\n\nCANCELLED AD/ENG/1\n\nCANCELLED AD/ENG/2\n\nApproved Propeller Installations - CANCELLED AD/ENG/3 Amdt 1\n\nPiston Engine Continuing Airworthiness Requirements AD/ENG/4 Amdt 9\n\nTurbine Engine Continuing Airworthiness Requirements AD/ENG/5 Amdt 9\n\nPropeller Strike AD/ENG/6 Amdt 1\n\nReplacement of Life Limited Turbine Engine Components AD/ENG/7","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument does not change the substantive content of the listed Airworthiness Directives. It revokes the listed ADs and re-makes each as separate instruments \"in exactly the same form as appears in the latest published edition of the Directive\" (Note). Therefore the scope of regulatory obligations remains the same; the change is administrative in legal form rather than substantive."},"complexity_factors":["Instrument is narrowly administrative (revocation and re-issue) rather than substantive rulemaking.","Relies on cross-reference to statutory delegation (subregulation 39.001(1)), requiring users to check enabling regulation for legal authority and limits.","Effects depend on separate attached AD documents and the \"latest published edition,\" so full practical impact requires consulting those other documents.","Schedule lists multiple ADs; tracking which operators/aircraft are affected requires mapping each listed AD to specific aircraft/engine types in the attached ADs.","Minimal textual ambiguity in the instrument itself, but external dependencies (attached ADs, published editions) add operational steps for compliance officers."],"plain_english_summary":"This administrative instrument, signed by CASA delegate David Alan Villiers under subregulation 39.001(1), revokes a group of engine-related Airworthiness Directives and re‑issues each as a separate AD. The re‑made ADs are stated to be identical to their latest published editions, so substantive obligations remain unchanged. It primarily affects aircraft owners, operators, maintenance organisations and engineers who must continue complying with the existing AD requirements."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This instrument performs exactly the function described in its title — revoking and remaking Airworthiness Directives. The scope has not expanded beyond this administrative housekeeping purpose. The Note explicitly confirms the directives are being remade in exactly the same form, indicating no substantive expansion of content or purpose."},"complexity_factors":["Very short instrument (approximately 200 words)","Only one operative provision with two simple limbs (revocation and remaking)","No defined terms section","No cross-references to other legislation beyond the enabling regulation (subregulation 39.001(1))","Simple tabular schedule listing only 7 items with two columns","No conditional logic, exceptions, or nested provisions","Straightforward administrative action with no substantive policy changes"],"plain_english_summary":"**What this legislation does:**\n\nThis is an administrative instrument issued by the Civil Aviation Safety Authority (CASA) that performs a housekeeping function on aviation safety rules. Specifically, it:\n\n- **Revokes** (cancels) seven existing Airworthiness Directives (ADs) — these are mandatory safety notices that tell aircraft owners and operators what maintenance or inspections they must perform to keep their planes safe\n- **Immediately remakes** those same seven ADs as brand new, separate legal instruments\n\n**Who it affects:**\n\n- Aircraft owners and operators with piston engines, turbine engines, and propellers\n- Aircraft maintenance engineers and organisations\n- Anyone responsible for ensuring aircraft engines meet safety standards\n\n**Why it matters:**\n\nThis is a **legal tidying exercise**. CASA is reissuing these engine-related safety directives under updated regulation-making powers (specifically subregulation 39.001(1) of the Civil Aviation Safety Regulations 1998). The Note confirms the content stays exactly the same — no actual safety requirements are changing. This ensures the ADs remain legally valid and enforceable under the current regulatory framework.\n\n**The seven directives cover:**\n- Two cancelled directives (no longer active)\n- Approved propeller installations\n- Piston engine continuing airworthiness requirements\n- Turbine engine continuing airworthiness requirements  \n- Propeller strike damage procedures\n- Replacement of life-limited turbine engine components"}},"importantCases":[],"_links":{"self":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-engines-general","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-engines-general/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-engines-general/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-engines-general/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-engines-general/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-engines-general/documents"}}