2013-19-18: LPT stage 2 disc failure

Adoption of the Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows: PART 39--AIRWORTHINESS DIRECTIVES 0 1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701. Sec. 39.13 [Amended] 0 2. The FAA amends Sec. 39.13 by adding the following new airworthiness directive (AD): 2013-19-18 Rolls-Royce plc: Amendment 39-17600; Docket No. FAA-2013- 0052; Directorate Identifier 2013-NE-02-AD. (a) Effective Date This AD becomes effective November 7, 2013. (b) Affected ADs None. (c) Applicability This AD applies to all Rolls-Royce plc (RR) RB211-535E4-37, RB211-535E4-B-37, RB211-535E4-C-37, and RB211-535E4-B-75 turbofan engines. (d) Unsafe Condition This AD was prompted by RR updating the low-cycle-fatigue life analysis for the low pressure turbine (LPT) stage 2 discs. We are issuing this ADto prevent LPT stage 2 disc failure, which could result in uncontained engine damage and damage to the airplane. (e) Actions and Compliance (1) Within 30 days after the effective date of this AD, re- calculate the cyclic life since new of each LPT stage 2 disc. Use the part lives and prorated life formulas in Appendices 1, 2, and 3 of RR Alert Non-Modification Service Bulletin (NMSB) No. RB.211-72- AH029, dated December 13, 2012, to make that calculation. (2) Assign the Maximum Approved Lives defined in Appendix 1 of Alert NMSB No. RB.211-72-AH029, dated December 13, 2012, to the LPT stage 2 disc based on the flight profile that will be flown. (3) After the effective date of this AD, for engines that have an engine shop visit (ESV), before reaching the part life assigned in paragraph (e)(2) of this AD, remove the LPT stage 2 disc from service before the part exceeds the part life assigned in paragraph (e)(2). (4) For those engines that do not have an ESV after the effective date of this AD before the part exceeds the part life assigned in paragraph (e)(2) of this AD, remove the part from service at the next ESV. (f) Installation Prohibition Except for parts that have been reworked using RR Service Bulletin No. RB.211-72-D365, Revision 5, dated December 13, 2012, after the effective date of this AD, do not reinstall any part removed per this AD into any engine. (g) Definition For the purpose of this AD, an ESV is whenever engine maintenance performed prior to reinstallation requires the separation of a pair of major mating engine module flanges. Separation of flanges solely for the purpose of shipment without subsequent internal maintenance is not an ESV. Separation of the external gearbox engine mating flanges or removal of the external gearbox is also not classified as a shop visit. (h) Alternative Methods of Compliance (AMOCs) The Manager, Engine Certification Office, FAA, may approve AMOCs to this AD. Use the procedures found in 14 CFR 39.19 to make your request. (i) Related Information (1) For more information about this AD, contact Robert Green, Aerospace Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803; phone: 781-238-7754; fax: 781-238-7199; email: Robert.Green@faa.gov. (2) Refer to European Aviation Safety Agency Airworthiness Directive 2012-0266, dated December 18, 2012 for more information. You may examine the AD on the Internet at http://www.regulations.gov/#!documentDetail;D=FAA-2013-0052-0004. (j) Material Incorporated by Reference (1) The Director of the Federal Register approved the incorporation by reference (IBR) of the service information listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51. (2) You must use this service information as applicable to do the actions required by this AD, unless the AD specifies otherwise. (i) RR Alert Non-Modification ServiceBulletin (NMSB) No. RB.211-72-AH029, dated December 13, 2012. (ii) Reserved. (3) For Rolls-Royce plc service information identified in this AD, contact Rolls-Royce plc, Corporate Communications, P.O. Box 31, Derby, England, DE248BJ; phone: 011-44-1332-242424; fax: 011-44- 1332-249936; email: http://www.rolls-royce.com/contact/civil_team.jsp; or download from https://www.aeromanager.com. (4) You may view this service information at FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA. For information on the availability of this material at the FAA, call 781-238-7125. (5) You may view this service information at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202-741-6030, or go to: http://www.archives.gov/federal-register/cfr/ibr-locations.html. [[Page 61171]]