airworthiness · Rule · Final rule. · Published 2025-03-04 · Effective 2025-04-08 · 90 FR 11116
Document
Document number
2025-03459
Federal Register citation
90 FR 11116
Type
Rule
Action
Final rule.
Category
airworthiness
Publication date
2025-03-04
Effective date
2025-04-08
FAA docket
Docket No. FAA-2024-2424
Abstract
The FAA is adopting a new airworthiness directive (AD) for certain CFM International, S.A. (CFM) Model LEAP-1A, LEAP-1B, and LEAP- 1C engines. This AD was prompted by a manufacturer investigation that revealed a quality escape for low-pressure turbine (LPT) disks made from forgings with nonconforming grain size. This AD requires removal and replacement of the LPT stage 4 and stage 5 disks. The FAA is issuing this AD to address the unsafe condition on these products.