2024-06-14: Turbine Engine Compressor 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 adding the following new airworthiness directive: 2024-06-14 International Aero Engines, LLC: Amendment 39-22719; Docket No. FAA-2023-1989; Project Identifier AD-2023-00512-E. (a) Effective Date This airworthiness directive (AD) is effective June 3, 2024. (b) Affected ADs None. (c) Applicability This AD applies to International Aero Engines, LLC Model PW1124G1-JM, PW1127G-JM, PW1127GA-JM, PW1129G-JM, PW1130G-JM, PW1133G-JM, and PW1133GA-JM engines having a high-pressure compressor (HPC) 2nd stage rotor or HPC 4th stage rotor having a part number and serial number identified in the Applicability, Table 2, of Pratt & Whitney (PW) Alert Service Bulletin (ASB) PW1000G-C-72-00-0208-00A-930A-D, Issue 002, dated January 18, 2024 (PW ASB PW1000G-C-72-00-0208-00A-930A-D, Issue 002). (d) Subject Joint Aircraft System Component (JASC) Code 7230, Turbine Engine Compressor Section. (e) Unsafe Condition This AD was prompted by a report that certain HPC 2nd stage rotors and HPC 4th stage rotors have potentially degraded knife-edge seals and abrasive coating of the rear wing 4th stage rotor due to having been cleaned in alkaline solution without masking the knife-edge seal coating. The FAA is issuing this AD to prevent material degradation and fracture of the HPC 2nd stage rotor and HPC 4th stage rotor. The unsafe condition, if not addressed, could result in uncontained part release or dual-engine shutdown, damage to engine, damage to airplane, and loss of the airplane. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Required Actions (1) At the next engine shop visit after the effective date of this AD, remove the HPC 2nd stage rotor having a part number and serial number identified in the Applicability, Table 2, of PW ASB PW1000G-C-72-00-0208-00A-930A-D, Issue 002, and replace with a part eligible for installation. (2) At the next engine shop visit after the effective date of this AD, remove the HPC 4th stage rotor having a part number and serial number identified in the Applicability, Table 2, of PW ASB PW1000G-C-72-00-0208-00A-930A-D, Issue 002, and replace with a part eligible for installation. (h) Definitions (1) For the purposes of this AD, a "part eligible for installation" is: (i) Any HPC 2nd stage rotor or HPC 4th stage rotor, as applicable, that does not have a part number and serial number identified in the Applicability, Table 2, of PW ASB PW1000G-C-72-00-0208-00A-930A-D, Issue 002; or (ii) Any HPC 2nd stage rotor or HPC 4th stage rotor, as applicable, that has incorporated PW ASB PW1000G-C-72-00-0208-00A-930A-D, Issue 002. (2) For the purposes of this AD, an "engine shop visit" is the induction of an engine into the shop for maintenance involving the separation of the "H" flange. (i) Credit for Previous Actions You may take credit for the replacement of the HPC 2nd stage rotor or HPC 4th stage rotor required by paragraph (g)(1) or (2) of this AD if the HPC 2nd stage rotor or HPC 4th stage rotor incorporated PW Service Bulletin PW1000G-C-72-00-0208-00A-930A-D, Issue 001, dated September 13, 2022, before the effective date of this AD. (j) Alternative Methods of Compliance (AMOCs) (1) The Manager, AIR-520 Continued Operational Safety 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, AIR-520 Continued Operational Safety Branch, send it to the attention of the person identified in paragraph (k) of this AD and email 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) Additional Information For more information about this AD, contact Carol Nguyen, Aviation Safety Engineer, FAA, 2200 South 216th Street, Des Moines, WA 98198; phone: (781) 238-7655; email: carol.nguyen@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) Pratt & Whitney Alert Service Bulletin PW1000G-C-72-00-0208-00A-930A-D, Issue 002, dated January 18, 2024. (ii) [Reserved] (3) For Pratt & Whitney service information identified in this AD, contact International Aero Engines, LLC, 400 Main Street, East Hartford, CT 06118; phone: (860) 565-0140; email: help24@pw.utc.com; website: connect.prattwhitney.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 material at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, visit www.archives.gov/federal-register/cfr/ibr-locationsoremailfr.inspection@nara.gov. Issued on March 22, 2024. Victor Wicklund, Deputy Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2024-09104 Filed 4-26-24; 8:45 am]BILLING CODE 4910-13-P