2020-24-08: Turbine Section

The Amendment \n\n\n\tAccordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows: \n\nPART 39--AIRWORTHINESS DIRECTIVES \n\n0 1. The authority citation for part 39 continues to read as follows: \n\n\n\tAuthority: 49 U.S.C. 106(g), 40113, 44701. \n\n\n\nSec. 39.13 (Amended) \n\n0 2. The FAA amends Sec. 39.13 by adding the following new airworthiness directive (AD): \n\n2020-24-08 Rolls-Royce Deutschland Ltd & Co KG (Type Certificate Previously Held by Rolls-Royce plc): Amendment 39-21338; Docket No. FAA-2020-1032; Project Identifier MCAI-2020-00856-E. \n\n(a) Effective Date \n\n\n\tThis AD is effective January 4, 2021. \n\n(b) Affected ADs \n\n\n\tNone. \n\n(c) Applicability \n\n\n\tThis AD applies to Rolls-Royce Deutschland Ltd & Co KG (Type Certificate Previously Held by Rolls-Royce plc) (RRD) RB211 Trent 768-60, 772-60, 772B-60, and 772C-60 model turbofan engines with an engine serial number (ESN) identified in Table 1 or Table 2 ofAppendix 1 of Rolls-Royce (RR) RB211 Trent 700 Series Alert Non- Modification Service Bulletin RB.211-72-AK165, dated November 26, 2018 (the NMSB). \n\n(d) Subject \n\n\n\tJoint Aircraft System Component (JASC) Code/Air Transport Association (ATA) of America Code 7250--Turbine Section. \n\n(e) Unsafe Condition \n\n\n\tThis AD was prompted by a determination by the manufacturer that high-pressure turbine (HPT) blades on several RB211 Trent 700 model turbofan engines have been subject to high levels of corrosion fatigue, leading to HPT blade cracking and eventual release. The FAA is issuing this AD to prevent failure of the HPT blades. The unsafe condition, if not addressed, could result in blade failure and subsequent release of high-energy debris, possibly resulting in damage to, and reduced control of, the airplane. \n\n(f) Compliance \n\n\n\tComply with this AD within the compliance times specified, unless already done. \n\n(g) Required Actions \n\n\n\t(1) For engines with an ESN listedin Table 1 of Appendix 1 of the NMSB, prior to each HPT blade accumulating 3,500 flight cycles since new, or before further flight after the effective date of this AD, whichever occurs later, remove the HPT blade from service and replace with a part eligible for installation. \n\t(2) For engines with an ESN listed in Table 2 of Appendix 1 of the NMSB, prior to each HPT blade accumulating 5,800 flight cycles since new, or before further flight after the effective date of this AD, whichever occurs later, remove the HPT blade from service and replace with a part eligible for installation. \n\t(3) If the flight cycles since new of an HPT blade are unable to be determined, use the flight cycles since new, flight cycles since refurbishment, or flight cycles since overhaul of the HPT module. \n\n(h) Definition \n\n\n\tFor the purpose of this AD, ''a part eligible for installation'' is: \n\t(1) An HPT blade that has: \n\t(i) Been removed from an engine with a serial number listed in Table 1 of theNMSB; and \n\t(ii) not exceeded 3,500 flight cycles since new; and \n\t(iii) before installation, passed an inspection (no crack detected) in accordance with Task 72-41-52-200-800--General Data for the Inspection of the High Pressure (HP) Turbine Blades, dated June 10, 2011, from the (Rolls-Royce) RR Trent-768-60/15 Engine Manual (RR Task 72-41-52-200-800); or \n\t(2) An HPT blade that has: \n\t(i) Been removed from an engine with a serial number listed in Table 2 of the NMSB; and \n\t(ii) not exceeded 5,800 flight cycles since new; and \n\t(iii) before installation, passed an inspection (no crack detected) in accordance with Task 72-41-52-200-800--General Data for the Inspection of the High Pressure (HP) Turbine Blades, dated June 10, 2011, from the RR Trent-768-60/15 Engine Manual (RR Task 72-41- 52-200-800); or \n\t(3) An HPT blade with zero flight cycles since new. \n\n(i) No Reporting Requirements \n\n\n\tThe reporting requirements specified in paragraph R. of RR Task 72-41-52-200-800 are not required by this AD. \n\n(j) Alternative Methods of Compliance (AMOCs) \n\n\n\t(1) The Manager, ECO Branch, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or local Flight Standards District Office, as appropriate. If sending information directly to the manager of the certification office, send it to the attention of the person identified in Related Information. You may email your request to: ANE-AD-AMOC@faa.gov. \n\t(2) Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the local flight standards district office/certificate holding district office. \n\n(k) Related Information \n\n\n\t(1) For more information about this AD, contact Scott Stevenson, Aviation Safety Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: (781) 238-7132; fax: (781) 238-7199; email: Scott.M.Stevenson@faa.gov. \n\t(2) Refer to European Aviation Safety Agency (EASA) AD No. 2018- 0291, dated December 21, 2018, for more information. You may examine the EASA AD in the AD docket at https://www.regulations.gov by searching for and locating it in Docket No. FAA-2018-1032. \n\n(l) Material Incorporated by Reference \n\n\n\t(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. \n\t(2) You must use this service information as applicable to do the actions required by this AD, unless the AD specifies otherwise. \n\t(i) Rolls-Royce RB211 Trent 700 Series Alert Non-Modification Service Bulletin RB.211-72-AK165, dated November 26, 2018. \n\t(ii) Task 72-41-52-200-800--General Data for the Inspection of the High Pressure (HP) Turbine Blades, dated June 10, 2011, from \n\n((Page 82305)) \n\nthe (Rolls-Royce) RR Trent-768-60/15 Engine Manual. \n\t(3)For service information identified in this AD, contact Rolls-Royce plc, P.O. Box 31, Derby, DE24 8BJ, United Kingdom, phone: +44 (0)1332 242424; website: https://www.rolls-royce.com/contact-us.aspx. \n\t(4) You may view this service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 1200 District Avenue, Burlington, MA 01803. For information on the availability of this material at the FAA, call (781) 238-7759. \n\t(5) You may view this service information that is incorporated by reference at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, email: fedreg.legal@nara.gov, or go to: https://www.archives.gov/federal-register/cfr/ibr-locations.html. \n\n\n\tIssued on November 17, 2020. Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service. (FR Doc. 2020-27897 Filed 12-17-20; 8:45 am) BILLING CODE 4910-13-P