AD 2020-20-17
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | General Electric | Company | Airworthiness Directives; General Electric Company Turbofan Engines |
Unsafe Condition
accumulated thermal cycles of the MN4 integrated circuit in the full authority digital engine control (FADEC) through normal operation causes the solder ball joints to wear out and eventually fail over time, resulting in loss of engine thrust control and reduced control of the airplane.
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Required Actions
prohibits dispatch of the airplane if certain status messages are displayed on the engine indicating and crew alerting system (EICAS) and if certain conditions are present per the manufacturer's service information, and requires revision of the existing FAA-approved minimum equipment list (MEL) by incorporating into the MEL the dispatch restrictions listed in this AD within 120 days of the effective date of this AD.
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Compliance Time
Within 120 days of the effective date of this AD
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Affected Aircraft
General Electric Company 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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