2021-10-09: Turbine Engine Compressor 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: \n\n2021-10-09 CFM International, S.A.: Amendment 39-21542; Docket No. FAA-2019-0568; Project Identifier 2019-NE-20-AD. \n\n(a) Effective Date \n\n\n\tThis airworthiness directive (AD) is effective June 24, 2021. \n\n(b) Affected ADs \n\n\n\tNone. \n\n(c) Applicability \n\n\n\t(1) This AD applies to all CFM International, S.A. (CFM) CFM56- 5B1, -5B1/2P, -5B1/3, -5B1/P, -5B2, -5B2/2P, -5B2/3, -5B2/P, -5B3/ 2P, -5B3/2P1, -5B3/3, -5B3/3B1, -5B3/P, -5B3/P1, -5B4, -5B4/2P, - 5B4/2P1, -5B4/3, -5B4/3B1, -5B4/P, -5B4/P1, -5B5, -5B5/3, -5B5/P, - 5B6, -5B6/2P, -5B6/3, -5B6/P, -5B7, -5B7/3,-5B7/P, -5B8/3, -5B8/P, -5B9/2P, -5B9/3, -5B9/P, CFM56-7B20, -7B20/2, -7B20/3, -7B20E, - 7B22, -7B22/2, -7B22/3, -7B22/3B1, -7B22/B1, -7B22E, -7B22E/B1, - 7B24, -7B24/2, -7B24/3, -7B24/3B1, -7B24/B1, -7B24E, -7B24E/B1, - 7B26, -7B26/2, -7B26/3, -7B26/3B1, -7B26/3B2, -7B26/3B2F, -7B26/3F, -7B26/B1, -7B26/B2, -7B26E, -7B26E/B1, -7B26E/B2, -7B26E/B2F, - 7B26E/F, -7B27, -7B27/2, -7B27/3, -7B27/3B1, -7B27/3B1F, -7B27/3B3, -7B27/3F, -7B27/B1, -7B27/B3, -7B27A, -7B27A/3, -7B27AE, -7B27E, - 7B27E/B1, -7B27E/B1F, -7B27E/B3, and -7B27E/F model turbofan engines with a high-pressure turbine (HPT) inner stationary seal, part number (P/N) 1808M56G01 installed that has a serial number (S/N) listed in Planning Information, Paragraph 1.A., Table 1, of CFM Service Bulletin (SB) CFM56-5B S/B 72-0952, Revision 01, dated January 15, 2020, or in Planning Information, Paragraph 1.A., Table 1, CFM SB CFM56-7B S/B 72-1054, Revision 01, dated January 15, 2020, installed. \n\t(2) This AD does not apply to affected CFM CFM56-5B and CFM56-7B model turbofan engines with the affected HPT inner stationary seal installed if the seal has been repaired as specified in CFM56-5B Engine Shop Manual (ESM), 72-41-03, REPAIR 003, or CFM56-7B ESM, 72- 41-03, REPAIR 003, after the year listed in Paragraph 1.A., Table 1, of CFM SB CFM56-5B S/B 72-0952, Revision 01, dated January 15, 2020, or Paragraph 1.A., Table 1, CFM SB CFM56-7B S/B 72-1054, Revision 01, dated January 15, 2020. \n\n(d) Subject \n\n\n\tJoint Aircraft System Component (JASC) Code 7230, Turbine Engine Compressor Section. \n\n(e) Unsafe Condition \n\n\n\tThis AD was prompted by cracks found in the rotating air HPT front seal. The FAA is issuing this AD to prevent failure of the HPT inner stationary seal and the rotating air HPT front seal. The unsafe condition, if not addressed, could result in uncontained release of the rotating air HPT front seal, 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((Page 27268)) \n\n(g) Required Actions \n\n\n\t(1) At the next engine shop visit after the effective date of this AD, remove the affected HPT inner stationary seal and replace with a HPT inner stationary seal that is eligible for installation. \n\t(2) After removing the affected HPT inner stationary seal required by paragraph (g)(1), inspect the removed HPT inner stationary seal for honeycomb separation, as defined in the Accomplishment Instructions, paragraph 3.C.(1), in CFM SB CFM56-5B S/B 72-0952, Revision 01, dated January 15, 2020, or in CFM SB CFM56-7B S/B 72-1054, Revision 01, dated January 15, 2020. \n\t(3) If honeycomb separation is found during the inspection required by paragraph (g)(2) of this AD, before further flight: \n\t(i) Remove the rotating air HPT front seal from service and replace with a rotating air HPT front seal that is eligible for installation. \n\t(ii) Remove the HPT rotor blades and replace them withHPT rotor blades eligible for installation. \n\t(iii) Remove the No. 3 ball bearing from service and replace with a No. 3 ball bearing eligible for installation. \n\n(h) Definitions \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 situations, which do not constitute an engine shop visit. \n\t(i) Separation of engine flanges solely for the purpose of transportation of the engine without subsequent maintenance. \n\t(ii) Separation of engine flanges solely for the purpose of replacing the fan or propulsor without subsequent maintenance. \n\t(2) For the purpose of this AD, an HPT inner stationary seal that is eligible for installation is an HPT inner stationary seal: \n\t(i) That is not listed in Planning Information, Paragraph 1.A., Table 1, of CFM SB CFM56-5B S/B 72-0952, Revision 01, dated January 15, 2020, or in PlanningInformation, Paragraph 1.A., Table 1, CFM SB CFM56-7B S/B 72-1054, Revision 01, dated January 15, 2020; or \n\t(ii) with a P/N 1808M56G01 and with a S/N listed in Paragraph 1.A., Table 1, of CFM SB CFM56-5B S/B 72-0952, Revision 01, dated January 15, 2020, or Paragraph 1.A., Table 1, CFM SB CFM56-7B S/B 72-1054, Revision 01, dated January 15, 2020, that has been repaired per CFM56-5B ESM, 72-41-03, REPAIR 003, or CFM56-7B ESM, 72-41-03, REPAIR 003, after the year listed in Paragraph 1.A., Table 1, of CFM SB CFM56-5B S/B 72-0952, Revision 01, dated January 15, 2020, or Paragraph 1.A., Table 1, CFM SB CFM56-7B S/B 72-1054, Revision 01, dated January 15, 2020. \n\t(3) For the purpose of this AD, a rotating air HPT front seal that is eligible for installation is any rotating air HPT front seal that was not removed from service as a result of the inspection of the HPT inner stationary seal required by paragraph (g)(2) of this AD in which there was a finding of honeycomb separation. \n\t(4) Forthe purpose of this AD, HPT rotor blades eligible for installation are new HPT rotor blades with zero flight hours since news or HPT rotor blades that have been inspected and returned to a serviceable condition using approved engine manual requirements. \n\t(5) For the purpose of this AD, a No. 3 ball bearing eligible for installation is any No. 3 ball bearing that was not removed from service as a result of the inspection of the HPT inner stationary seal required by paragraph (g)(2) of this AD in which there was a finding of honeycomb separation. \n\n(i) No Reporting Requirement \n\n\n\tThe reporting requirements contained within the SBs referenced in paragraph (g) of this AD 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\tFor more information about this AD, contact Christopher McGuire, Aviation Safety Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: (781) 238-7120; fax: (781) 238-7199; email: chris.mcguire@faa.gov. \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) CFM Service Bulletin CFM56-5B S/B 72-0952, Revision 01, dated January 15, 2020. \n\t(ii) CFM Service Bulletin CFM56-7B S/B 72-1054, Revision 01, dated January 15, 2020. \n\t(3) For CFM service information identified in this AD, contact CFM International Inc., Aviation Operations Center, 1 Neumann Way, M/D Room 285, Cincinnati, OH 45125; phone: (877) 432-3272; fax: (877) 432-3329; email: aviation.fleetsupport@ge.com. \n\t(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 (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 April 29, 2021. Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service. (FR Doc. 2021-10607 Filed 5-19-21; 8:45 am) BILLING CODE 4910-13-P