AD 2013-24-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
Engine damage and thrust loss events as a result of flying in high altitude ice crystal icing (ICI) conditions, leading to potential unrecoverable thrust loss on multiple engines.
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Required Actions
Revise the airplane flight manual (AFM) to advise flight crews of potential ICI conditions at high altitudes and prohibit operation in moderate and severe ICI conditions. Inspect the engine after any ICI event is detected by the flight crew, with specific compliance requirements based on the airplane model.
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Compliance Time
Before further flight for affected engines, with specific requirements based on the airplane model.
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Affected Aircraft
The Boeing Company Model 747-8 and 747-8F series airplanes and Model 787-8 airplanes powered by GEnx engines.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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