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Airworthiness Directive 2024-25-02

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Official AD 2024-25-02 · FR doc 2025-00207 · 2025-01-08 · turbine engine

Airworthiness Directives; CFM International, S.A. Engines

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for certain CFM International, S.A. (CFM) Model LEAP-1B engines. This AD was prompted by a report of a quality escape involving certain high- pressure compressor (HPC) stage 2 seals manufactured without detailed finish machining, which could result in deeper rubs and mechanical damage to the seal teeth of the stage 3-4 compressor rotor blisk (stage 3-4 blisk) of the mating compressor rotor during initial operation. This AD requires a visual inspection of the HPC stage 2 seal, a visual inspection of the forward arm seal teeth of the stage 3-4 blisk, an eddy current inspection (ECI) of the forward arm seal teeth of the stage 3-4 blisk, and replacement of the HPC stage 2 seal and the stage 3-4 blisk, if necessary. The FAA is issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2024-25-02 applies to

MakesCfm International, S.A.
ModelsLEAP-1B21, LEAP-1B23, LEAP-1B25, LEAP-1B27, LEAP-1B28, LEAP-1B28B1, LEAP-1B28B2, LEAP-1B28B2C, LEAP-1B28B3, LEAP-1B28BBJ1, LEAP-1B28BBJ2, LEAP-1B
Serial-conditional — narrows to serials 60A635–60A635, 60A647–60A647, 60A662–60A662, 60A682–60A682, 60A702–60A702, 60A639–60A639, 60A650–60A650, 60A663–60A663, 60A686–60A686, 60A642–60A642, 60A653–60A653, 60A670–60A670, 60A687–60A687, 60A643–60A643, 60A655–60A655, 60A671–60A671, 60A689–60A689, 60A644–60A644, 60A656–60A656, 60A673–60A673, 60A690–60A690, 60A645–60A645, 60A660–60A660, 60A678–60A678, 60A691–60A691, 60A646–60A646, 60A661–60A661, 60A679–60A679, 60A696–60A696.

Applies only to engines having an engine serial number (ESN) identified in Table 1 to paragraph (c) of this AD.

Whether AD 2024-25-02 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.

How AD compliance is recorded

A valid compliance record (14 CFR 43.9) states:

Method of compliance — The specific action taken (inspected, replaced, modified) and to what revision.
Date — When the work was done.
Aircraft time — Total time in service / tach at compliance — how recurring next-due is computed.
Signature & certificate — The A&P/IA who returned it to service, with certificate number.
Is AD 2024-25-02 complied with on your aircraft?

Tailplate reads a tail number’s logbooks and matches every applicable AD — including this one — to its compliance evidence, with recurring next-due dates computed.

Look up a tail number →Read the full directive (Federal Register)

Applicability is derived from the FAA directive corpus and is advisory, not a legal airworthiness determination. Compliance is established only from an aircraft’s actual records.