AD 2021-15-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | General Electric | Company | Airworthiness Directives; General Electric Company Turbofan Engines |
Unsafe Condition
An in-service occurrence of loss of engine thrust control resulting in uncommanded high thrust due to accumulated thermal cycles of the MN4 integrated circuit in the FADEC, through normal operation, causing the solder ball joints to wear out and eventually fail over time.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove and replace the full authority digital engine control (FADEC) integrated circuit (MN4) microprocessor using an approved overhaul procedure.
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Compliance Time
Before further flight
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Affected Aircraft
All General Electric Company (GE) GE90-110B1 and GE90-115B model turbofan engines.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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