{"id":"F2012L01700","name":"AD/TRENT 700/2 - Engine - IP Turbine Bearing Oil Feed Tube","slug":"ad-trent-700-2-engine-ip-turbine-bearing-oil-feed-tube","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":89667,"registerId":"commonwealth-F2012L01700-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 700/2 | Engine - IP Turbine Bearing Oil Feed Tube | 17/2012 |\n| -------------- | ----------------------------------------- | ------- |\n\n| Applicability: | RB211 Trent 700 series engines identified in EASA AD 2007-0260 except when previously modified in accordance with Rolls-Royce Service Bulletins 72-F117,72-F048 or 72-F227.                                                                                                            |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Perform the periodic inspections specified in sections (1) and (2), and carry out the terminating action specified in section (3), of EASA AD 2007-0260 at Revision 1 or later approved revision.Note: Rolls-Royce Service Bulletin RB211-72-AF045 Rev 2 refers.                       |\n| Compliance:    | Periodic inspections must be performed at the intervals specified in EASA AD2007-0260 at Revision 1 or later approved revision. Terminating action must be completed before the first flight after the next 05 module overhaul, but not later than31 May 2014, whichever occurs first. |\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 2007-0260 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 700/2","sectionType":"part","heading":"AD/TRENT 700/2","content":"## AD/TRENT 700/2","sortOrder":1},{"sectionNumber":"Engine - IP Turbine Bearing Oil Feed Tub","sectionType":"part","heading":"Engine - IP Turbine Bearing Oil Feed Tube","content":"## Engine \\- IP Turbine Bearing Oil Feed Tube","sortOrder":2},{"sectionNumber":"17/2012","sectionType":"part","heading":"17/2012","content":"## 17/2012","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"CASA has explicitly mandated EASA AD 2007-0260 for applicable RB211 Trent 700 engines on Australian aircraft, making the state-of-design AD a domestic legal requirement (Background). The mandate applies to engines not already modified by specified Rolls‑Royce Service Bulletins, so applicability is narrower for previously modified units (Applicability)."},"complexity_factors":["Incorporation by reference to an external EASA AD (EASA AD 2007-0260 Rev 1 or later) requires operators to track and apply later approved revisions (Requirement).","Applicability carve-out for engines already modified by Rolls‑Royce Service Bulletins 72-F117, 72-F048 or 72-F227 creates an eligibility check that operators must perform before applying the AD (Applicability).","Compliance timing is dual-bound: action must occur before the first flight after the next 05 module overhaul or by an absolute date (31 May 2014), introducing scheduling constraints for operators and MROs (Compliance).","Periodic inspection intervals are set by the referenced EASA AD rather than in this instrument, adding an administrative burden to obtain and follow the correct revision (Requirement/Compliance).","The directive mandates specified maintenance actions rather than offering alternatives, limiting operator discretion and contracting choices for remediation (Requirement).","Operators must coordinate overhaul scheduling with mandated terminating action, which may affect maintenance planning and costs (Compliance/Applicability).","Limited regulatory complexity otherwise: single engine type, narrowly scoped hardware item, and a clear compliance deadline reduce interpretative ambiguity (Applicability/Compliance)."],"plain_english_summary":"This directive requires operators of Rolls‑Royce RB211 Trent 700 series engines on Australian aircraft to carry out the periodic inspections and a final corrective (terminating) action for the IP turbine bearing oil feed tube, following EASA AD 2007-0260 (Revision 1 or later). It affects aircraft operators and maintenance providers who must schedule inspections to the specified intervals and complete the terminating action by the next 05‑module overhaul or by 31 May 2014 (whichever is earlier)."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This instrument maintains its original narrow scope. It is a straightforward adoption of a European safety directive for a specific engine component, with no expansion into broader operational or regulatory matters."},"complexity_factors":["Short, single-purpose instrument (approximately 250 words)","Only 3 defined/modified terms requiring external reference (EASA AD 2007-0260, specific Rolls-Royce Service Bulletins)","Simple conditional structure: applies to all engines in series EXCEPT those with prior specific modifications","Clear compliance timeline with 'whichever occurs first' logic (next overhaul OR 31 May 2014)","No nested exceptions or recursive definitions","Heavy reliance on incorporated external documents (EASA AD and Rolls-Royce SBs) for technical details, which keeps the instrument itself brief but creates dependency complexity"],"plain_english_summary":"This AD mandates inspections and a required replacement of a specific oil feed tube on Rolls‑Royce Trent 700 engines that supplies lubricant to the IP turbine bearing. It affects Australian operators, airlines and maintenance organisations using these engines (unless already modified per Rolls‑Royce service instructions).\n\nThe action prevents loss of bearing lubrication that could cause catastrophic engine failure in flight and aligns Australian requirements with the corresponding European directive, with set inspection intervals and a final compliance deadline."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-trent-700-2-engine-ip-turbine-bearing-oil-feed-tube","history":"/api/acts/ad-trent-700-2-engine-ip-turbine-bearing-oil-feed-tube/history","analysis":"/api/acts/ad-trent-700-2-engine-ip-turbine-bearing-oil-feed-tube/analysis","conflicts":"/api/acts/ad-trent-700-2-engine-ip-turbine-bearing-oil-feed-tube/conflicts","importantCases":"/api/acts/ad-trent-700-2-engine-ip-turbine-bearing-oil-feed-tube/important-cases","documents":"/api/acts/ad-trent-700-2-engine-ip-turbine-bearing-oil-feed-tube/documents"}}