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Final ruleTook effect Feb. 25, 2026

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 Jan. 21, 2026. Document 2026-01094. Updated Nov. 15, 2026.

What it does

The FAA is superseding Airworthiness Directive (AD) 2018-19-16 for all CFM International, S.A. (CFM) Model LEAP-1A23, -1A24, -1A24E1, -1A26, -1A26E1, -1A26CJ, -1A29, -1A29CJ, -1A30, -1A32, -1A33, -1A33B2, and -1A35A engines with certain full authority digital engine control (FADEC) and prognostic health monitoring (PHM) software installed. AD 2018-19-16 required removing certain FADEC and PHM software and installing versions eligible for installation. Since the FAA issued AD 2018-19-16, the manufacturer has developed a new pressure subsystem (PSS) with a heater element to evaporate potential moisture on the PSS manifold/transducer interface and prevent freezing at low temperature. This AD requires replacing certain FADEC and PHM software with new versions that are eligible for installation, replacing certain harnesses with newly designed harnesses, and replacing the PSS with a newly designed heated PSS. 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 489 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

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

Since then:

What happens next and when

This AD is effective February 25, 2026.

The agency's dates, word for word.

Document number2026-01094
ActionFinal rule.
AgenciesTransportation Department; Federal Aviation Administration
PublishedJan. 21, 2026
Effective dateFeb. 25, 2026
Regulation identifier (RIN)2120-AA64
DocketFAA-2025-1725

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