2021-26-22: Turbine Section

1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701. 2. The FAA amends § 39.13 by: a. Removing Airworthiness Directive 2020-20-13, Amendment 39-21269 (85 FR 63193, October 7, 2020); and b. Adding the following new airworthiness directive: 2021-26-22 General Electric Company: Amendment 39-21881; Docket No. FAA-2021-0791; Project Identifier AD-2021-00716-E. (a) Effective Date This airworthiness directive (AD) is effective March 14, 2022. (b) Affected ADs This AD replaces AD 2020-20-13, Amendment 39-21269 (85 FR 63193, October 7, 2020). (c) Applicability This AD applies to General Electric Company (GE) CF6-80A, CF6-80A1, CF6-80A2, CF6-80A3, CF6-80C2A1, CF6-80C2A2, CF6-80C2A3, CF6-80C2A5, CF6-80C2A5F, CF6-80C2A8, CF6-80C2B1, CF6-80C2B1F, CF6-80C2B2, CF6-80C2B2F, CF6-80C2B4, CF6-80C2B4F, CF6-80C2B5F, CF6-80C2B6, CF6-80C2B6F, CF6-80C2B6FA, CF6-80C2B7F, CF6-80C2D1F, CF6-80C2L1F, and CF6-80C2K1F model turbofan engines with an installed high-pressure turbine (HPT) disk with a serial number (S/N) listed in Table 1 or 2 of Appendix A, paragraph 4., in GE CF6-80C2 Service Bulletin (SB) 72-1562 R05, dated March 19, 2021 (GE SB 72-1562), and Table 1 of Appendix-A, paragraph 4., in GE CF6-80A SB 72-0869 R03, dated March 19, 2021 (GE SB 72-0869). (d) Subject Joint Aircraft System Component (JASC) Code 7250, Turbine Section. (e) Unsafe Condition This AD was prompted by an uncontained failure of an HPT stage 2 disk and the manufacturer's determination to expand the population of affected HPT disks requiring ultrasonic inspection (UI). The FAA is issuing this AD to prevent failure of the HPT stage 1 disk (CF6-80C2 engines) and the HPT stage 2 disk (CF6-80C2 and CF6-80A engines). The unsafe condition, if not addressed, could result in an uncontained HPT disk release, damage to the engine, and damage to the airplane. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Required Actions (1) For CF6-80C2 model turbofan engines, at each piece-part exposure after the effective date of this AD, perform a UI of affected HPT stage 1 and stage 2 disks using the Accomplishment Instructions, paragraph 3.A.(2), of GE SB 72-1562. (2) For CF6-80A model turbofan engines, at each piece-part exposure after the effective date of this AD, perform a UI of affected HPT stage 2 disks using the Accomplishment Instructions, paragraph 3.A.(2), of GE SB 72-0869. (3) If any disk fails the inspection required by paragraph (g)(1) or (2) of this AD, replace the disk with a part eligible for installation before further flight. (h) No Reporting Requirements The reporting requirements specified in the Accomplishment Instructions, paragraphs 3.A.(2)(c) and 3.A.(2)(f), of GE SB 72-1562, and paragraph 3.A.(3), of GE SB 72-0869, are not required by this AD. (i) Definitions (1) For the purpose of this AD, a "part eligible for installation" is an HPT stage 1 or stage 2 disk: (i) That has been inspected in accordance with paragraph (g)(1) or (2) of this AD and a rejectable indication was not found; or (ii) With an S/N not listed in Table 1 or 2 of Appendix A, paragraph 4., in GE SB 72-1562, or Table 1 of Appendix-A, paragraph 4., in GE SB 72-0869. (2) For the purpose of this AD, "piece-part exposure" of the HPT stage 1 or stage 2 disk is the separation of that HPT disk from its mating rotor parts within the HPT rotor module (thermal shield and HPT stage 1 and stage 2 disk, respectively). (j) Alternative Methods of Compliance (AMOCs) (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 (k) of this AD. Information may be emailed to: ANE-AD-AMOC@faa.gov. (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. (k) Related Information For more information about this AD, contact Sungmo Cho, Aviation Safety Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: (781) 238-7241; fax: (781) 238-7199; email: Sungmo.D.Cho@faa.gov . (l) Material Incorporated by Reference (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. (2) You must use this service information as applicable to do the actions required by this AD, unless the AD specifies otherwise. (i) GE CF6-80C Service Bulletin (SB) 72-1562 R05, dated March 19, 2021. (ii) GE CF6-80A SB 72-0869 R03, dated March 19, 2021. (3) For GE service information identified in this AD, contact General Electric Company, 1 Neumann Way, Cincinnati, OH 45215; phone: (513) 552-3272; email: aviation.fleetsupport@ge.com; website: www.ge.com. (4) You may view this service information at 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 (817) 222-5110. (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: fr.inspection@nara.gov, or go to: https://www.archives.gov/federal-register/cfr/ibr-locations.html. Issued on December 16, 2021. Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2022-02455 Filed 2-4-22; 8:45 am]BILLING CODE 4910-13-P