AD 2003-26-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | General Electric | Company CF34-8C1 Series and CF34-8C5 Series | Airworthiness Directives; General Electric Company CF34-8C1 Series and CF34-8C5 Series Turbofan Engines |
Unsafe Condition
Master variable geometry (VG) actuator electrical signal faults, including dual-channel faults, which can cause an uncommanded reduction of thrust to idle and loss of ability to advance thrust above idle. This could result in a multi-engine loss of thrust if dual-channel faults occur simultaneously on more than one engine.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Review the airplane Maintenance Data Computer (MDC) for master VG actuator fault messages, or if MDC is inoperative, review the Engine Indication and Crew Alerting System (EICAS) for fault messages. Replace actuators reported faulty by the Full Authority Digital Engine Control (FADEC).
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 50 flight hours after the effective date of the AD.
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Affected Aircraft
General Electric Company CF34-8C1 series and CF34-8C5 series turbofan engines with certain serial number (SN) master variable geometry (VG) actuators installed.
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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