2020-15-07: Turbine Section

Adoption of 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\n2020-15-07 Rolls-Royce Deutschland Ltd & Co KG (Type Certificate formerly held by Rolls-Royce plc): Amendment 39-21170; Docket No. FAA-2020-0617; Project Identifier MCAI-2020-00391-E. \n\n(a) Effective Date \n\n\n\tThis AD is effective August 4, 2020. \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 formerly held by Rolls-Royce plc) RB211-524G2-19, RB211- 524G2-T-19, RB211-524G3-19, RB211-524G3-T-19, RB211-524H2-19, RB211- 524H2-T-19, RB211-524H-36 and RB211-524H-T-36 model turbofan engines with low-pressure turbine (LPT) stage 1 disks, part number (P/N) UL37606, UL37607, UL37608, UL37722 or UL37790, installed. \n\n(d) Subject \n\n\n\tJoint Aircraft System Component (JASC) Code 7250, Turbine Section. \n\n(e) Unsafe Condition \n\n\n\tThis AD was prompted by a determination by the manufacturer that the current published life limits established for certain part and serial numbered LPT stage 1 disks that have undergone rework could no longer be supported. The FAA is issuing this AD to prevent failure of the LPT stage 1 disk. The unsafe condition, if not addressed, could result in uncontained release of high-energy debris from the engine, in-flight shutdown of the engine, damage to the engine, and damage to 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\tBefore the LPT stage 1 disk reaches its Declared Safe Cycle Limit (DSCL) as specified in the Accomplishment Instructions, Paragraph 3., Tables 1 through 9, in Rolls-Royce plc Alert Non- Modification Service Bulletin (NMSB) RB.211-72-AK422, Revision 1, dated March 2, 2020, or within 25 flight cycles after the effective date of this AD, whichever occurs later, remove the LPT stage 1 disk from service and replace with a part eligible for installation. \n\n(h) Definition \n\n\n\tFor the purpose of this AD, a part eligible for installation is any LPT stage 1 disk that is new or has not reached its DSCL as specified in the Accomplishment Instructions, Paragraph 3., Tables 1 through 9, in the Rolls-Royce Alert NMSB RB.211-72-AK422, Revision 1, dated March 2, 2020. \n\n(i) 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. Ifsending information directly to the manager of the certification office, send it to the attention of the person identified in paragraph (j)(1) of this AD. 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(j) Related Information \n\n\n\t(1) For more information about this AD, contact Kenneth Steeves, Aerospace Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: 781-238-7765; fax: 781-238-7199; email: kenneth.steeves@faa.gov. \n\t(2) Refer to European Union Aviation Safety Agency AD No. 2020- 0059, dated March 17, 2020, for more information. You may examine the EASA AD in the AD docket on the internet at https://www.regulations.gov by searching for and locating it in Docket No. FAA-2020-0617. \n\n(k) 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 plc Alert Non-Modification Service Bulletin RB.211-72-AK422, Revision 1, dated March 2, 2020. \n\t(ii) (Reserved) \n\t(3) For Rolls-Royce plc service information identified in this AD, contact Rolls-Royce Deutschland Ltd & Co KG, Eschenweg 11, 15827, Blankenfelde-Mahlow, Germany; phone: +49 (0) 33 708 6 0; 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 July 10, 2020. Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service. (FR Doc. 2020-15563 Filed 7-17-20; 8:45 am) BILLING CODE 4910-13-P