Airworthiness directives › 2011-08-10
AD 2011-08-10 Airworthiness Directives; Rolls-Royce plc (RR) RB211-Trent 768-60 and Trent 772-60 Turbofan Engines
Applicability*9
This AD applies to Rolls-Royce plc (RR) RB211-Trent 768-60 turbofan engines prior to serial No. 41052, and RB211-Trent 772-60 turbofan engines prior to serial No. 41052.
Compliance
Comply with this AD before further flight, unless already done. Repositioning of the Oil Metering Jet (f) Reposition the oil metering jet up into the oil distributor within the bevel gearshaft, using RR Service Bulletin No. RB.211 72-C270, dated June 1, 1997. Alternative Methods of Compliance (AMOCs) (g) The Manager, Engine Certification Office, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. Related Information (h) For more information about this AD, contact Alan Strom, Aerospace Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803; telephone 781-238-7143; fax 781-238-7199; e-mail: alan.strom@faa.gov. Material Incorporated by Reference (i) You must use Rolls-Royce plc Service Bulletin No. RB.211 72-C270, dated June 1, 1997, to do the actions required by this AD. (1) The Director of the Federal Register previously approved the incorporation by reference of this service information under 5 U.S.C. 552(a) and 1 CFR part 51, as of October 1, 1998 (63 FR 49416, September 16, 1998). (2) For service information identified in this AD, contact Rolls-Royce plc, P.O. Box 31, Derby, DE24 8BJ, United Kingdom; telephone 44 1332 242424; fax 44 1332 249936; e-mail: tech.help@rolls-royce.com. (3) You may review copies at the FAA, New England Region, 12 New England Executive Park, Burlington, MA; or 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. For information on the availability of this material at the FAA, call 781-238-7125. Issued in Burlington, Massachusetts, on April 5, 2011. Peter A. White, Acting Manager, Engine & Propeller Directorate, Aircraft Certification Service. [FR Doc. 2011-8469 Filed 4-11-11; 8:45 am] BILLING CODE 4910-13-P
Unsafe condition
This AD was prompted by RR demonstrating that the repositioning of the oil metering jet eliminates the need for the repetitive inspections, by the need to correct the AD applicability, and by the need to eliminate the visual inspections of the MCD. We are issuing this AD to prevent in-flight engine shutdowns caused by step aside gearbox (SAGB) driving bevel gearshaft ball bearing failure.
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