Data / Federal rules / 2025-14890
Airworthiness Directives; CFM International, S.A. Engines
The Federal Aviation Administration published this proposed rule in the Federal Register on August 6, 2025. Comments closed on September 22, 2025.
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What the agency says
The FAA proposes to supersede Airworthiness Directive (AD) 2018-19-16, which applies to 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 requires 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 proposed AD would require replacing certain FADEC and PHM software with new versions that are eligible for installation, replacement of certain harnesses with newly designed harnesses, and replacement of the PSS with a newly designed heated PSS. The FAA is proposing this AD to address the unsafe condition on these products.
Key facts
- Document number
- 2025-14890
- Type
- Proposed rule
- Action
- Notice of proposed rulemaking (NPRM)
- Agency
- Transportation Department; Federal Aviation Administration
- Published
- August 6, 2025
- Comments due
- September 22, 2025
- Dates
- The FAA must receive comments on this proposed AD by September 22, 2025.
- Docket
- Docket No. FAA-2025-1725; Project Identifier AD-2025-00583-E
- Regulation ID (RIN)
- 2120-AA64
- Code of Federal Regulations
- 14 CFR 39
- Topics
- Air transportation; Aircraft; Aviation safety; Incorporation by reference; Safety
- Pages
- 3
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Everything from the Federal Aviation Administration · Rules on air transportation · Rules on aircraft · Rules on aviation safety · Published in August 2025
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