AD 2011-25-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
An error in the engine indication and crew alerting system (EICAS) operating program software (OPS) prevents the display of an advisory message to the flightcrew of a left engine fuel filter contamination and imminent bypass condition, which may indicate an imminent multiple engine thrust loss or engine malfunction event due to fuel contamination.
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Required Actions
Install new operating program software (OPS) Version 7 of the engine indication and crew alerting system (EICAS) in the EICAS computers. Perform various concurrent actions depending on the airplane configuration, including installing a certain EICAS OPS version, making wiring changes, replacing the audio accessory unit, replacing certain handsets and EICAS computers, changing EICAS computer connector keying, and loading operational program configuration (OPC) software. Retain the existing AD provision that relieves certain airplanes (those equipped with certain EICAS OPS versions) from the requirements.
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Compliance Time
Before further flight
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Affected Aircraft
The Boeing Company 757-200, 757-200PF, 757-200CB, 757-300, 767-200, 767-300, and 767-300F series airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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