Engine Fuel & Control – Engine Electronic Control Software – Modification / Replacement
Superseded. Comply with 2022-0253, which replaces this document.
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of Airbus A330-841 and A330-941 aeroplanes must install the serviceable EEC software standard 3.1 on each engine within 24 months from 10 September 2021. They must also comply with Airbus Service Bulletins A330-73-3061 and A330-73-3062 as part of the modification process. From 10 September 2023, aircraft must not operate with affected EEC software installed, and intermixing of certain software versions is restricted until that date.
Summary
EASA Airworthiness Directive 2021-0198 is an airworthiness directive issued for Airbus A330-841 and A330-941 aeroplanes equipped with Rolls-Royce Trent 7000 engines. It addresses an unsafe condition related to the Engine Electronic Control (EEC) software that could cause erroneous engine oil pressure warnings and potentially lead to dual engine in-flight shutdown. The directive mandates modification or replacement of affected EEC software to a serviceable standard.
What changed
This directive introduces a requirement to install updated EEC software standard 3.1 on affected engines to prevent false engine oil pressure warnings. It prohibits the operation of aircraft with the affected EEC software installed after 10 September 2023 and restricts intermixing of certain EEC software part numbers until that date. It also allows engine or EEC unit replacements as alternative compliance methods.
Why it matters
This directive is critical for aviation professionals to ensure flight safety by preventing unintended engine shutdowns caused by false warnings. Operators and maintenance organizations must update or replace EEC software within the specified timeframe to remain compliant and avoid operational restrictions. Compliance ensures continued airworthiness and reduces the risk of in-flight engine failures.
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