AD Amdt-39-10047
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | General Electric | Company GE90 Series | Airworthiness Directives; General Electric Company GE90 Series Turbofan Engines |
Unsafe Condition
Failure of the Variable Speed Constant Frequency (VSCF) gearshaft flange ball bearings due to rivets manufactured from improper material could result in an inflight engine shutdown.
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Required Actions
Replace VSCF gearshaft flange ball bearings that incorporate rivets of improper material with serviceable bearings. Perform visual checks of the engine Debris Monitoring System (DMS) sensor for bearing debris and conduct additional maintenance actions if necessary.
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Compliance Time
Before further flight
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Affected Aircraft
General Electric Company GE90 series turbofan engines with engine serial numbers referenced in the revised Service Bulletin (SB).
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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