{"id":"F2007L00693","name":"AD/V2500/3 - No. 3 Bearing","slug":"ad-v2500-3-no-3-bearing","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":64254,"registerId":"commonwealth-F2007L00693-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"International Aero Engines AG V2500 seri","sectionType":"division","heading":"International Aero Engines AG V2500 series","content":"### International Aero Engines AG V2500 series\n\n| AD/V2500/3 | No. 3 Bearing | 4/2007 |\n| ---------- | ------------- | ------ |\n\n| Applicability: | International Aero Engines AG (IAE) V2522-A5, V2524-A5, V2527-A5,V2527E-A5, V2527M-A5, V2530-A5, and V2533-A5 turbofan engines with engine serial numbers V10601 through V11335 inclusive and bearings part number (P/N) 2A1165 installed.Note 1: These engines are installed on, but not limited to, Airbus Industrie A319, A320, and A321 series aeroplanes.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |\n| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. For engines listed in Table 1 of Appendix 1 of IAE Service Bulletin (SB) No. V2500-ENG-72-0452, Revision 4, dated 30 September 2005, and that have aNo. 3 bearing, P/N 2A1165, installed at new production build, inspect the master MCD or the No. 1, 2, 3 bearing chamber MCD.Note 2: It is recommended that the inspection of the master MCD or the No. 1, 2, 3 bearing chamber MCD, as detailed in Requirement 1 of this AD, on all engines installed on the same aeroplane, not be done by the same individual before the same flight. This is to minimize the chances of maintenance error on multiple engine aeroplanes.2. If bearing material is found on the master MCD or No. 1, 2, 3 bearing chamber MCD, remove the engine from service.3. Remove the No. 3 bearing from service.4. Do not install any No. 3 bearing, P/N 2A1165, removed in accordance with Requirement 3 of this AD, into any engine.5. Remove the HPC stubshaft that has a low-energy plasma coating.Terminating ActionPerforming the requirements specified in Requirements 3 and 5 of this AD is terminating action to the repetitive MCD inspections specified in Requirement 1 of this AD.Note 3: FAA AD 2006-25-01Amdt 39-14841 dated 27 November 2006 refers. |\n\n| Compliance: | 1. Within 125 hours time-in-service (TIS) after the effective date of this AD, thereafter, at intervals not to exceed 125 hours time-since-last inspection of the master MCD or the No. 1, 2, 3 bearing chamber MCD.2. Before further flight after the effective date of this AD.3. At the next shop visit, for engines listed in Table 1 of Appendix 1 of IAE SB No. V2500-ENG-72-0452, Revision 4, that have a serial number (SN) from V10601 through V11335 inclusive, and that have a No. 3 bearing, P/N 2A1165 installed at new production.4. From the effective date of this AD.5. At the next shop visit, for engines listed in Table 1 of Appendix 1 of IAE SB No. V2500-ENG-72-0452, Revision 4, that have a SN from V10601 through V11335 inclusive. |\n| ----------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|             | This Airworthiness Directive becomes effective on 12 April 2007.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |\n| Background: | The issuing of this AD is to prevent failure of the No. 3 bearing, which could result in an in-flight shutdown and smoke in the cockpit and cabin. The smoke is a result of oil escaping from the bearing compartment due to a fracture of the No. 3 bearing race.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |\n\n![](image.001.png)  \nDavid Punshon  \nDelegate of the Civil Aviation Safety Authority\n\n21 February 2007","sortOrder":0},{"sectionNumber":"AD/V2500/3","sectionType":"part","heading":"AD/V2500/3","content":"## AD/V2500/3","sortOrder":1},{"sectionNumber":"No. 3 Bearing","sectionType":"part","heading":"No. 3 Bearing","content":"## No. 3 Bearing","sortOrder":2},{"sectionNumber":"4/2007","sectionType":"part","heading":"4/2007","content":"## 4/2007","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":false,"description":"This AD maintains focused scope on the specific No. 3 bearing defect in defined engine serial numbers. It does not appear to have expanded beyond its original safety purpose of addressing the bearing fracture risk."},"complexity_factors":["Multiple cross-references to external technical documents (IAE Service Bulletin V2500-ENG-72-0452, Revision 4, and FAA AD 2006-25-01)","Specific applicability criteria combining engine models, serial number ranges, and part numbers","Five distinct requirements with different compliance timeframes (125 hours TIS, before further flight, next shop visit, from effective date)","Technical aviation terminology requiring specialized knowledge (MCD, TIS, HPC stubshaft, plasma coating, terminating action)","Nested conditions: Requirement 1 only applies to engines 'listed in Table 1 of Appendix 1' of the referenced service bulletin AND with specific part numbers installed at new production"],"plain_english_summary":"This CASA Airworthiness Directive mandates frequent magnetic chip detector (MCD) inspections for certain IAE V2500 engines (S/N V10601–V11335) on Airbus A319/A320/A321 to detect failing No. 3 bearings (P/N 2A1165). If bearing material is found, the engine must be grounded, the bearing retired and the high‑pressure compressor stubshaft replaced; once replaced, the repetitive inspections end. It prevents engine failure, in‑flight shutdowns and smoke from oil leaks."},"flash_summary":{"complexity_score":6,"scope_assessment":{"changed":false,"description":"Scope is limited to engines listed in Table 1 of Appendix 1 of IAE SB V2500-ENG-72-0452 Revision 4 with serial numbers V10601–V11335 inclusive that have No. 3 bearing P/N 2A1165 installed. The AD prescribes inspections, removals and a terminating repair for that defined population and does not broaden applicability beyond that set (Applicability; Requirements; Compliance)."},"complexity_factors":["Targeted applicability by engine serial numbers V10601–V11335 and specific part number P/N 2A1165 increases administrative filtering (Applicability).","Repetitive inspection interval obligation: inspect within 125 hours TIS and at intervals not to exceed 125 hours (Requirement 1; Compliance 1) — creates ongoing maintenance scheduling and tracking burdens.","Immediate action on findings: remove engine from service if bearing material is found (Requirement 2; Compliance 2), which imposes operational disruption and potential AOG/shop visit costs.","Mandatory removal of the No. 3 bearing and prohibition on reinstalling removed bearings (Requirements 3–4; Compliance 3–4) creates parts replacement and disposal costs and prevents reuse.","A terminating action depends on removing the HPC stubshaft with a low‑energy plasma coating (Requirement 5; Compliance 5), introducing a specific engineering intervention to stop repetitive checks.","Recommendation to avoid the same individual inspecting all engines on the same aeroplane (Requirement 1 Note 2) adds procedural controls to reduce human error but increases coordination.","Cross-reference to IAE Service Bulletin V2500-ENG-72-0452 Revision 4 and FAA AD 2006-25-01A (Applicability; Notes) requires operators to follow external technical documents and regulatory material.","Timing dependencies: several actions are tied to the next shop visit for engines with certain SNs, producing conditional compliance pathways (Compliance 3,5)."],"plain_english_summary":"This directive requires regular inspections of the master MCD or the No. 1, 2, 3 bearing chamber MCD on certain IAE V2500 engines fitted with No. 3 bearing P/N 2A1165, removal of the bearing and removal of an HPC stubshaft with a low‑energy plasma coating if faults are found, and prohibits reinstalling removed bearings. It is intended to prevent No. 3 bearing race fractures that could lead to in‑flight shutdown and cockpit/cabin smoke."},"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-v2500-3-no-3-bearing","history":"/api/acts/ad-v2500-3-no-3-bearing/history","analysis":"/api/acts/ad-v2500-3-no-3-bearing/analysis","conflicts":"/api/acts/ad-v2500-3-no-3-bearing/conflicts","importantCases":"/api/acts/ad-v2500-3-no-3-bearing/important-cases","documents":"/api/acts/ad-v2500-3-no-3-bearing/documents"}}