EASA AD US-2020-20-12
Turbine Engine - Electronic Engine Control Software - Installation
Summary
Federal Aviation Administration Airworthiness Directive 2020-20-12 is a final rule addressing General Electric Company GEnx-1B series turbofan engines, including models -1B64, -1B67, -1B70, and others. It mandates the installation of electronic engine control (EEC) software version B205 or later to mitigate the risk of combustor case burn-through. This directive aims to enhance engine safety and prevent potential engine fires and damage to the aircraft.
What Changed
This new airworthiness directive introduces a requirement for operators to install EEC software version B205 or later on all affected GE GEnx-1B turbofan engines. It does not supersede any previous ADs but addresses a distinct unsafe condition related to combustor case burn-through. The directive clarifies that spare engines and EECs are not subject to this requirement unless installed on an aircraft.
Why It Matters
This AD is critical for aviation professionals because it prevents engine failures caused by combustor case burn-through, which can lead to engine fires and aircraft damage. Operators and maintenance teams must ensure compliance to maintain airworthiness and avoid regulatory violations. The update to EEC software enhances engine reliability and safety, reducing operational risks.
What To Do
Operators of affected GE GEnx-1B turbofan engines must install EEC software version B205 or later within 120 days from the effective date of November 5, 2020. Compliance involves updating the engine control software either at the engine level or on-wing using FAA-approved procedures. Spare engines and EECs do not require this update unless installed on an aircraft.
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