Engine Fuel & Control — Engine Electronic Control Software — Modification / Replacement
- Published
- Effective
- Deadline
- Replaces
- 2021-0198
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must avoid intermixing specified EEC software part numbers as detailed in the directive and ensure that from 10 September 2023, no engines with affected EEC software standard 3.0.1 are operated. By 2 January 2025, all affected engines must have serviceable EEC software installed following Airbus Service Bulletin A330-73-3065 instructions. Compliance with these requirements is mandatory unless alternative methods are approved by EASA.
Summary
EASA Airworthiness Directive 2022-0253 is an airworthiness directive addressing the engine electronic control software on Airbus A330-841 and A330-941 aeroplanes equipped with Rolls-Royce Trent 7000 engines. It mandates modifications or replacements of affected Engine Electronic Control (EEC) software to prevent potential engine crystal icing protection loss. The directive applies to specific EEC software part numbers and requires compliance to ensure continued safe operation.
What changed
This directive supersedes EASA AD 2021-0198 and introduces new operational limitations prohibiting the operation of aeroplanes with certain affected EEC software installed from specified dates. It also updates the rules on intermixing different EEC software part numbers and requires installation of serviceable EEC software standard 5.3 or later. The directive provides additional instructions for modification and replacement of the engine electronic control software to address the unsafe condition.
Why it matters
This directive is critical for aviation professionals because it addresses a safety risk where erroneous total pressure values could cause loss of engine crystal icing protection, potentially leading to dual engine in-flight shutdown. Operators and maintenance organizations must ensure compliance to avoid unsafe conditions and regulatory penalties. It also affects maintenance planning and software configuration management for affected Airbus A330 models with Trent 7000 engines.
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