AD 2022-17-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | CFM | International | Airworthiness Directives; CFM International, S.A. Turbofan Engines |
Unsafe Condition
Multiple commanded in-flight shutdowns (IFSDs) due to inner radial drive shaft (RDS) failure, caused by inadequate oil flow to the RDS bearing, which led to the RDS bearing and RDS bearing cage failure.
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Required Actions
Initial and repetitive inspections of the transfer gearbox (TGB) scavenge screens, and depending on the results of the inspections, replacement or rework of the affected inner RDS. As a mandatory terminating action to the initial and repetitive inspections of the TGB scavenge screens, replacement or rework of the affected inner RDS. Prohibition of the installation of an engine with an affected inner RDS onto an airplane that already has one engine with an affected inner RDS installed.
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Compliance Time
Within 50 flight hours
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Affected Aircraft
CFM LEAP-1B21, LEAP-1B23, LEAP-1B25, LEAP-1B27, LEAP-1B28, LEAP-1B28B1, LEAP-1B28B2, LEAP-1B28B2C, LEAP-1B28B3, LEAP-1B28BBJ1, and LEAP-1B28BBJ2 model turbofan engines.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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