2026-04-09: 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: 2026-04-09 General Electric Company: Amendment 39-23269; Docket No. FAA-2026-1334; Project Identifier AD-2025-01336-E. (a) Effective Date This airworthiness directive (AD) is effective March 11, 2026. (b) Affected ADs None. (c) Applicability This AD applies to General Electric Company Model GEnx-1B64, GEnx-1B64/P1, GEnx-1B64/P2, GEnx-1B67, GEnx-1B67/P1, GEnx-1B67/P2, GEnx-1B70, GEnx-1B70/75/P1, GEnx-1B70/75/P2, GEnx-1B70/P1, GEnx-1B70/P2, GEnx-1B70C/P1, GEnx-1B70C/P2, GEnx-1B74/75/P1, GEnx-1B74/75/P2, GEnx-1B76/P2, Genx-1B76A/P2, GEnx-2B67, GEnx-2B67/P, and GEnx-2B67B engines with a high-pressure compressor (HPC) stage 5 blisk having part number (P/N) 2357M35P02 installed and a serial number (S/N) referenced in paragraphs (c)(1) through (3) of this AD: (1) S/N TMT214T8 (2) S/N TMT214T9 (3) S/N TMT218UA (d) Subject Joint Aircraft System Component (JASC) Code 7230, Turbine Engine Compressor Section. (e) Unsafe Condition This AD was prompted by a report of certain HPC stage 5 blisks manufactured from a single forged ingot with a nonconforming indication. The FAA is issuing this AD to prevent fracture and subsequent uncontained release of certain HPC stage 5 blisks. The unsafe condition, if not addressed, could result in uncontained debris 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) Definitions For the purpose of this AD: (1) A part "eligible for installation" is any HPC stage 5 blisk that does not have a P/N and S/N identified in paragraph (c) of this AD. (2) A "piece-part exposure" is when the affected part is removed from the engine and completely disassembled. (h) Required Actions At the next piece-part exposure or before exceeding 7,700 cycles since new, whichever occurs first after the effective date of this AD, remove the affected HPC stage 5 blisk from service and replace with a part eligible for installation. (i) Alternative Methods of Compliance (AMOCs) 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 of the AIR-520 Continued Operational Safety Branch, send it to the attention of the person identified in paragraph (j) of this AD and email to: AMOC@faa.gov . 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. (j) Additional Information For more information about this AD, contact Itanza Young, Aviation Safety Engineer, FAA, 2200 South 216th Street, Des Moines, WA 98198; phone: (206) 482-6306; email: itanza.n.young@faa.gov . (k) Material Incorporated by Reference None. Issued on February 19, 2026. Peter A. White, Deputy Director, Integrated Certificate Management Division, Aircraft Certification Service. [FR Doc. 2026-03613 Filed 2-23-26; 8:45 am] BILLING CODE 4910-13-P