AD 2002-01-12
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 high pressure turbine (HPT) interstage seal, specifically in the pre-life-improved rotor (pre-LIR) configuration, could result in an uncontained engine failure and damage to the airplane.
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Required Actions
Remove from service HPT interstage seals in the pre-LIR configuration and install a new design, identified as the life improved rotor (LIR) configuration seal. Establish a new lower life limit for the LIR configuration seal.
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Compliance Time
Before further flight
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Affected Aircraft
General Electric Company GE90 series turbofan engines with HPT interstage seals in the pre-life-improved rotor (pre-LIR) configuration.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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