2013-23-17: High-pressure (HP) and intermediate-pressure (IP) turbine discs

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): 2013-23-17 Rolls-Royce plc: Amendment 39-17672; Docket No. FAA-2013- 0750; Directorate Identifier 2013-NE-25-AD. (a) Effective Date This AD is effective December 11, 2013. (b) Affected ADs None. (c) Applicability This AD applies to Rolls-Royce plc (RR) RB211-535E4-37, -535E4- B-37, -535E4-C-37, RB211 Trent 768-60, 772-60, and 772B-60 turbofan engines with turbine disc part numbers (P/Ns) and serial numbers (S/ Ns) listed in Table 1 to paragraph (c) of this AD. [[Page 70489]] Table 1 to Paragraph (c)--New Reduced Cyclic Life Limits for High-Pressure (HP)/Intermediate-Pressure (IP) Turbine Discs ---------------------------------------------------------------------------------------------------------------- New reduced cyclic life Engine P/Ns S/Ns limit ---------------------------------------------------------------------------------------------------------------- RB211-535E4-37,-535E4-B-37, -535E4-C- UL39767................ LDRCZ19900............. 11,400 flight cycles 37. (FCs). UL39767................ LDRCZ19903............. UL39767................ LDRCZ19904............. RB211 Trent 768-60, 772-60, and 772B- FK26893................ LDRCZ19901............. 8,687 FCs. 60. FK26893................ LDRCZ20081............. FK26893................ LDRCZ20082............. FK26893................ LDRCZ20084............. FK26893................ LDRCZ20088............. FK26893................ LDRCZ20089............. FK26893................ LDRCZ20090............. FK26893................ LDRCZ20093............. FK26893................ LDRCZ20094............. FK26893................ LDRCZ20097............. FK26893................ LDRCZ20099............. FK26893................ LDRCZ20100............. FK20795 or FW53118..... LDREB12176............. 9,270 FCs. FK20795 or FW53118..... LDREB12177............. FK20795 or FW53118..... LDREB12178............. FK20795 or FW53118..... LDREB12179............. FK20795 or FW53118..... LDREB12180............. ---------------------------------------------------------------------------------------------------------------- (d) Reason This AD was prompted by a report of an HP disc contaminated with a steel inclusion. We are issuing this AD to prevent failure of the HP or IP turbine disc, uncontained engine failure, and damage to the airplane. (e) Actions and Compliance Comply with this AD within the compliance times specified, unless already done. (1) Remove from service, within 30 days, any HP or IP disc identified in Table 1 to paragraph (c) of this AD that has exceeded the new cyclic life limit, or before the disc accumulates flight cycles that equal the new reduced cyclic life limit listed in Table 1 to paragraph (c) of this AD, whichever is later. (2) Do not approve for return to service any engine with any installed HP or IP turbine disc listed in Table 1 to paragraph (c) of this AD, if the disc exceeds the new reduced cyclic life limit listed in Table 1 to paragraph (c) of this AD. (f) Alternative Methods of Compliance (AMOCs) The Manager, Engine Certification Office, may approve AMOCs for this AD. Use the procedures found in 14 CFR 39.19 to make your request. (g) Related Information (1) For more information about this AD, contactFrederick Zink, Aerospace Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803; phone: 781-238-7779; fax: 781-238-7199; email: frederick.zink@faa.gov. (2) Refer to MCAI European Aviation Safety Agency AD 2012-0155, dated July 18, 2013. You may examine the MCAI in the AD docket on the Internet at http://www.regulations.gov by searching for and locating it in Docket No. FAA-2013-0750. (3) Rolls-Royce plc, Alert Non-Modification Service Bulletin No. RB.211-72-AH215, dated December 6, 2012 and RB.211-72-AH152, Revision 1, dated July 3, 2013, which are not incorporated by reference in this AD, can be obtained from RR using the contact information in paragraph (g)(4) of this AD. (4) For service information identified in this AD, contact Rolls-Royce plc, Corporate Communications, P.O. Box 31, Derby, DE24 8BJ, UK; phone: 44-0-1332-242424; fax: 44-0-1332-249936; email: http://www.rolls-royce.com/contact/civil_team.jsp. (5) You may view this service information at the 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. (h) Material Incorporated by Reference None.