AD 2023-07-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | CFM | International | Airworthiness Directives; CFM International, S.A. Engines |
Unsafe Condition
Wear on the No. 3 bearing spring finger housing can lead to high levels of non-synchronous vibration (NSV), which could induce high-pressure compressor (HPC) stall.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Operators must calculate the oil filter delta pressure (OFDP) data and, depending on the results, replace the No. 3 bearing spring finger housing. The AD also prohibits installing an engine with an affected No. 3 bearing spring finger housing onto an airplane that already has one such engine installed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 50 flight hours after the effective date of the AD.
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Affected Aircraft
CFM International, S.A. Model LEAP-1B engines, including specific sub-models such as LEAP-1B21, LEAP-1B23, LEAP-1B25, LEAP-1B27, LEAP-1B28, LEAP-1B28B1, LEAP-1B28B2, LEAP-1B28B2C, LEAP-1B28B3, LEAP-1B28BBJ1, and LEAP-1B28BBJ2.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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