AD 2001-21-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | General Electric | Company GE90 Series | Airworthiness Directives; General Electric Company GE90 Series Turbofan Engines |
Unsafe Condition
Corruption of Ps3 signals, which could result in simultaneous loss of thrust control of both engines.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect, clean, moisture purge, and if necessary, blend any high metal, nicks, or burrs on fitting threads on the engines, following the Accomplishment Instructions in GE Alert Service Bulletin No. GE90 73-A0060, Revision 3. The actions must be completed within specified cycles-in-service after the effective date of the AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 10 and 20 cycles-in-service after the effective date, depending on the engine.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
General Electric Company GE90-76B, -77B, -85B, and -90B turbofan engines installed on Boeing 777 series airplanes.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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