{"id":"F2012L01701","name":"AD/TRENT 700/3 - Engine - HP/IP Turbine Bearing Oil Vent Tubes","slug":"ad-trent-700-3-engine-hp-ip-turbine-bearing-oil-vent-tubes","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":89670,"registerId":"commonwealth-F2012L01701-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Rolls Royce Turbine Engines - RB211 TREN","sectionType":"division","heading":"Rolls Royce Turbine Engines - RB211 TRENT 700 Series","content":"### Rolls Royce Turbine Engines - RB211 TRENT 700 Series\n\n| AD/TRENT 700/3 | Engine - HP/IP TurbineBearing Oil Vent Tubes | 17/2012 |\n| -------------- | -------------------------------------------- | ------- |\n\n| Applicability: | RB211 Trent 700 series engines identified in EASA AD 2007-0201.                                                                                                                  |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Perform periodic maintenance specified in EASA AD 2007-0201.Note: Rolls-Royce Service Bulletin RB211-72-AE302 Rev 5 refers.                                                      |\n| Compliance:    | Periodic inspections must be performed at intervals specified in EASA AD2007-0201.                                                                                               |\n|                | This Airworthiness Directive becomes effective on 20 August 2012.                                                                                                                |\n| Background:    | CASA has reviewed state-of-design ADs applicable to Trent 700 engines and decided EASA AD 2007-0201 should be explicitly mandated for applicable engines in Australian aircraft. |\n\n![](image.001.png)\n\nMike Higgins  \nDelegate of the Civil Aviation Safety Authority\n\n14 August 2012","sortOrder":0},{"sectionNumber":"AD/TRENT 700/3","sectionType":"part","heading":"AD/TRENT 700/3","content":"## AD/TRENT 700/3","sortOrder":1},{"sectionNumber":"Engine - HP/IP TurbineBearing Oil Vent T","sectionType":"part","heading":"Engine - HP/IP TurbineBearing Oil Vent Tubes","content":"## Engine \\- HP/IP Turbine  \nBearing Oil Vent Tubes","sortOrder":2},{"sectionNumber":"17/2012","sectionType":"part","heading":"17/2012","content":"## 17/2012","sortOrder":3}],"analysis":{"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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard airworthiness directive adopting an external safety standard. It has not expanded beyond its original purpose of mandating specific maintenance for a defined engine component."},"complexity_factors":["Very short document (under 300 words)","Only 1 substantive requirement (perform periodic maintenance per external reference)","No defined terms section — relies entirely on external documents (EASA AD 2007-0201 and Rolls-Royce Service Bulletin)","No conditional logic or exceptions within the text itself","Simple structure: applicability, requirement, compliance date, background"],"plain_english_summary":"This Australian Airworthiness Directive makes mandatory the EASA-required inspections of oil vent tubes for high- and intermediate‑pressure turbine bearings on Rolls‑Royce RB211 Trent 700 engines (A330). It requires operators and maintenance organisations to follow Rolls‑Royce Service Bulletin RB211‑72‑AE302 Rev 5 to prevent oil leaks, bearing failures or engine shutdown. The AD took effect 20 August 2012."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"CASA converted a state-of-design airworthiness directive into an explicit domestic mandate by requiring compliance with EASA AD 2007-0201 for applicable Australian aircraft. That change clarifies and extends enforceability domestically, binding operators and maintenance providers to the external AD's inspection intervals and procedures (Background; Requirement)."},"complexity_factors":["References an external regulatory instrument (EASA AD 2007-0201) rather than setting technical detail itself (Requirement; Compliance).","Applicability is limited to RB211 Trent 700 engines identified in the referenced EASA AD (Applicability).","Mandates recurring inspections at specified intervals, creating ongoing operational and cost obligations for operators (Requirement; Compliance).","Directs operators to a manufacturer service bulletin for further procedural detail (Rolls‑Royce Service Bulletin RB211-72-AE302 Rev 5) (Requirement).","Sets a firm effective date for compliance (20 August 2012) rather than phased implementation (Compliance).","Gives little technical discretion in the AD text; interpretation/enforcement depends on CASA and maintenance organisations (Background)."],"plain_english_summary":"CASA requires operators of aircraft fitted with RB211 Trent 700 engines to carry out periodic maintenance on HP/IP turbine bearing oil vent tubes following the procedures and intervals in EASA AD 2007-0201. This makes the EASA inspection regime mandatory for Australian operators and maintenance providers, effective 20 August 2012 (Requirement; Compliance).\n\nOperators bear the inspection and repair costs and must follow the external AD and any referenced Rolls‑Royce service bulletin to remain compliant (Background; Requirement)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-trent-700-3-engine-hp-ip-turbine-bearing-oil-vent-tubes","history":"/api/acts/ad-trent-700-3-engine-hp-ip-turbine-bearing-oil-vent-tubes/history","analysis":"/api/acts/ad-trent-700-3-engine-hp-ip-turbine-bearing-oil-vent-tubes/analysis","conflicts":"/api/acts/ad-trent-700-3-engine-hp-ip-turbine-bearing-oil-vent-tubes/conflicts","importantCases":"/api/acts/ad-trent-700-3-engine-hp-ip-turbine-bearing-oil-vent-tubes/important-cases","documents":"/api/acts/ad-trent-700-3-engine-hp-ip-turbine-bearing-oil-vent-tubes/documents"}}