AD 2025-04-12
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | CFM | International | Airworthiness Directives; CFM International, S.A. Engines |
Unsafe Condition
a quality escape for certain low-pressure turbine (LPT) disks made from forgings with nonconforming grain size
Required Actions
remove and replace the LPT stage 4 and stage 5 disks at the next piece-part exposure or before exceeding the applicable cycles since new threshold identified in CFM Service Bulletin (SB) LEAP-1A-72-00-0519-01A-930A-D or CFM SB LEAP-1B-72-00-0419-01A-930A-D
Compliance Time
within the compliance times specified, unless already done
Affected Aircraft
CFM International, S.A. Model LEAP-1A, LEAP-1B, and LEAP-1C engines
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.