Airworthiness Directives; CFM International, S.A. Engines

Built by the Tribune's code from the Federal Register. No AI wrote this page. Published in the Federal Register July 10, 2026. Document 2026-13979. Updated Nov. 8, 2026.

What it does

The FAA is superseding Airworthiness Directive (AD) 2025-21- 03, which applied to certain CFM International, S.A. (CFM) Model LEAP- 1A23, LEAP-1A24, LEAP-1A24E1, LEAP-1A26, LEAP-1A26CJ, LEAP-1A26E1, LEAP-1A29, LEAP-1A29CJ, LEAP-1A30, LEAP-1A32, LEAP-1A33, LEAP-1A33B2, and LEAP-1A35A engines. AD 2025-21-03 required initial and repetitive borescope inspections (BSIs) of the high-pressure turbine (HPT) rotor stage 1 blades. Depending on the results of the BSIs, AD 2025-21-03 required either additional BSIs at reduced intervals or replacement of the HPT rotor stage 1 blades. Since the FAA issued AD 2025-21-03, the manufacturer published updated service material and determined that engines operating in the South Asia region are susceptible to accelerated HPT rotor stage 1 blade deterioration and airfoil distress. This AD requires initial and repetitive BSIs of the HPT rotor stage 1 blades and, depending on the results of the inspections, additional BSIs at reduced intervals or replacement of the HPT rotor stage 1 blades. The FAA is issuing this AD to address the unsafe condition on these products.

The Federal Aviation Administration's summary, as published in the Federal Register.

What changed in the regulation

1 part of Title 14 of the Code of Federal Regulations:

14 CFR 39

Wording on eCFR: the day before it took effect and from the day it took effect (first part listed).

Compared with

The Federal Aviation Administration has published 482 final rules in 2026 so far, compared with 518 in all of 2025.

Counted by the Tribune from Federal Register records since Jan. 1, 2025.

Before this

896 earlier Federal Register documents under regulation identifier 2120-AA64 since Jan. 1, 2025.

July 10, 2026 Final rule. Airworthiness Directives; Airbus SAS Airplanes
July 10, 2026 Final rule. Airworthiness Directives; Airbus SAS Airplanes
July 10, 2026 Final rule. Airworthiness Directives; Bombardier, Inc., Airplanes
July 10, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Safran Helicopter Engines, S.A. Engines
July 10, 2026 Final rule. Airworthiness Directives; Airbus Helicopters
July 9, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; The Boeing Company Airplanes
July 8, 2026 Supplemental notice of proposed rulemaking (SNPRM). Airworthiness Directives; Restricted Category Model CH-47D Helicopters
July 7, 2026 Final rule. Airworthiness Directives; Bell Textron Canada Limited Helicopters

Since then:

What happens next and when

This AD is effective July 27, 2026.

The agency's dates, word for word.

Check it yourself

The record as published

Document number	2026-13979
Action	Final rule; request for comments.
Agencies	Transportation Department; Federal Aviation Administration
Published	July 10, 2026
Effective date	July 27, 2026
Comments close	Aug. 24, 2026
Regulation identifier (RIN)	2120-AA64
Docket	FAA-2026-7214

Source: the Federal Register (public domain). The document in the Federal Register