2020-13-04: Engine Controls

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: 0 a. Removing Airworthiness Directive 2017-09-06, Amendment 39-18868 (82 FR 21111, May 5, 2017); and 0 b. Adding the following new airworthiness directive (AD): \n\n2020-13-04 General Electric Company: Amendment 39-21149; Docket No. FAA-2019-0683; Project Identifier AD-2020-00149-E. \n\n(a) Effective Date \n\n\n\tThis AD is effective July 24, 2020. \n\n(b) Affected ADs \n\n\n\tThis AD replaces AD 2017-09-06, Amendment 39-18868 (82 FR 21111, May 5, 2017). \n\n(c) Applicability \n\n\n\tThis AD applies to all General Electric Company (GE) GEnx-1B and GEnx-2B model turbofan engines. \n\n(d) Subject \n\n\n\tJoint AircraftSystem Component (JASC) Code 7600, Engine Controls. \n\n(e) Unsafe Condition \n\n\n\tThis AD was prompted by reports of GEnx-1B and GEnx-2B model turbofan engines experiencing power loss in ice crystal icing conditions. The FAA is issuing this AD to prevent engine failure. The unsafe condition, if not addressed, could result in loss of thrust control 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\t(1) Within 120 days after the effective date of this AD, install electronic engine control (EEC) software that is eligible for installation. \n\t(2) At the next engine shop visit after June 9, 2017 (the effective date of AD 2017-09-06), or before further flight, whichever occurs later, remove from service all GE GEnx-2B67, - 2B67B, and -2B67/P fan hub stator assembly booster outlet guide vanes (BOGV), part number (P/N) B1316-00720, and replace with a part eligible for installation. \n\n(h) Definition \n\n\n\t(1) For the purpose of this AD, an ''engine shop visit'' is the induction of an engine into the shop for maintenance involving the separation of pairs of major mating engine case flanges, except for the following which do not constitute an engine shop visit: \n\t(i) Separation of engine flanges solely for the purposes of transportation without subsequent maintenance does not constitute an engine shop visit. \n\n((Page 37003)) \n\n\n\t(ii) Separation of engine flanges solely for the purpose of replacing the fan or propulsor without subsequent maintenance does not constitute an engine shop visit. \n\t(2) For the purpose of this AD, EEC software that is eligible for installation is: \n\t(i) For GE GEnx-1B model turbofan engines, EEC software that is version B200 or later. \n\t(ii) For GEnx-2B model turbofan engines, EEC software that is version C090 or later. \n\t(3) For the purpose of this AD, a part eligible for installation is a fan hub stator assembly BOGV which: \n\t(i) Is not P/N B1316-00720; or, \n\t(ii) Was previously a P/N B1316-00720, but has been repaired and modified into P/N B1316-07637. \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. If sending information directly to the manager of the certification office, send it to the attention of the person identified in paragraph (j) 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\tFor more information about this AD, contact Mehdi Lamnyi, Aerospace Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: (781) 238-7743; fax: (781) 238-7199; email: Mehdi.Lamnyi@faa.gov. \n\n(k) Material Incorporated by Reference \n\n\n\tNone. \n\n\n\tIssued on June 12, 2020. Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service. (FR Doc. 2020-13126 Filed 6-18-20; 8:45 am) BILLING CODE 4910-13-P