{"id":"F2006B07977","name":"Airworthiness Directives 2004 - Revocation and Remaking - Pratt and Whitney Turbine Engines - JT8D Series","slug":"airworthiness-directives-2004-revocation-and-remaking-pratt-and-whitney-turbine-engines-jt8d-series","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115025,"registerId":"commonwealth-F2006B07977-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 - Pratt and Whitney Turbine Engines - JT8D 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\nPratt and Whitney Turbine Engines - JT8D-200 Series\n\nAD Name AD Number\n\nLife Limited Components - CANCELLED AD/JT8D-200/1\n\nNumber 4 and 5 Bearing Compartment Oil Fires AD/JT8D-200/2\n\nLow Pressure Turbine Anti-Rotation Pins AD/JT8D-200/3\n\nNumber 4-1/2 Bearing Spacer AD/JT8D-200/4","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"The legislation performs exactly the function described in its title — revoking and remaking specific Airworthiness Directives. There is no scope creep; it neither expands nor contracts the substantive safety requirements, merely restructures their legal form."},"complexity_factors":["Very short document (under 500 words)","Only 4 substantive items in Schedule 1","Simple binary structure: revoke + remake","No defined terms section — relies on external aviation knowledge","No nested conditional logic or cross-references to other legislation beyond the basic enabling power (Civil Aviation Safety Regulations 1998, subregulation 39.001(1))","Straightforward administrative mechanism with minimal legal innovation"],"plain_english_summary":"**What this legislation does:**\n\nThis is a technical aviation safety instrument that **revokes and immediately remakes** four specific Airworthiness Directives (ADs) for Pratt & Whitney JT8D-200 series turbine engines — the type commonly used in older Boeing 737 aircraft.\n\n**Who it affects:**\n- Airlines and operators flying aircraft with these engines\n- Maintenance organisations servicing these engines\n- The Civil Aviation Safety Authority (CASA) itself\n\n**What it actually does (in plain terms):**\n- **Cancels four old safety notices** (called \"Airworthiness Directives\") that required specific maintenance actions or inspections\n- **Immediately reissues them as new, separate legal instruments** — identical in content to the versions already in force\n\n**Why this matters:**\nThis is a **housekeeping exercise**. CASA is tidying up how these safety rules are legally structured. Instead of four directives bundled together in one 2004 document, each now becomes its own standalone instrument. This makes them easier to find, update, and enforce individually.\n\n**The four safety rules being remade cover:**\n- **Life-limited components** — parts that must be replaced after a set number of flight hours/cycles (this one was actually cancelled, not remade — see note below)\n- **Oil fire risks** in bearing compartments — preventing engine fires\n- **Anti-rotation pins** in the low-pressure turbine — stopping parts from spinning loose\n- **Bearing spacers** — ensuring proper spacing of engine bearings\n\n**Important note:** The first directive (AD/JT8D-200/1) was actually **cancelled** rather than remade — meaning that particular safety requirement no longer applies. The other three remain in force exactly as before."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument does not change the substantive scope or technical requirements of the listed Airworthiness Directives. It revokes the previous legal forms of those ADs and re-makes each as a separate instrument in exactly the same form as the latest published editions (see clauses (a)–(b); Note; Schedule 1)."},"complexity_factors":["Administrative/legal housekeeping rather than substantive regulatory change (Note indicates identical content).","Clear delegated authority cited (subregulation 39.001(1) of CASR 1998).","Small number of specific directives listed (four ADs in Schedule 1).","No substantive changes to technical requirements stated in the instrument.","Potential transitional/administrative tasks for regulators and affected operators."],"plain_english_summary":"A CASA delegate has formally revoked certain Airworthiness Directives for Pratt & Whitney JT8D-200 series engines and reissued each one in the same substantive form as the latest published editions. This is an administrative/legal repackaging: affected engine operators and maintainers keep the same technical obligations, but must switch to the re‑made instruments for compliance and record‑keeping."}},"importantCases":[],"_links":{"self":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-pratt-and-whitney-turbine-engines-jt8d-series","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-pratt-and-whitney-turbine-engines-jt8d-series/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-pratt-and-whitney-turbine-engines-jt8d-series/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-pratt-and-whitney-turbine-engines-jt8d-series/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-pratt-and-whitney-turbine-engines-jt8d-series/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-pratt-and-whitney-turbine-engines-jt8d-series/documents"}}