Engine Fuel & Control — Engine Electronic Controller Software — Update
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must update the engine electronic controller software on Group 1 engines within 30 days of the effective date, 4 June 2019. Installation of affected software on any engine or controller is prohibited after this update. For any engine or controller installed after the effective date, the software must be updated to the serviceable version within 30 days or before the aircraft is released to service, whichever is later.
Summary
EASA Airworthiness Directive 2019-0112 is an official directive addressing Rolls-Royce Trent XWB-75, XWB-79, XWB-79B, and XWB-84 engines installed on Airbus A350 aircraft. It mandates an update to the engine electronic controller software to correct fuel flow limits and low pressure shaft speed parameters. This directive ensures continued airworthiness and safe operation of affected engines.
What changed
This directive introduces a mandatory update to the engine electronic controller software from affected versions XWB_84-4.2.2 to the serviceable version XWB_84-6.1.1. It prohibits installation of the affected software on any engine or electronic engine controller after the update. The update optimizes fuel flow limits and low pressure shaft speed parameters to prevent engine instability and potential blade failures.
Why it matters
The update is critical to prevent loss of thrust control and potential multiple low pressure compressor blade failures, which could lead to high energy debris release and reduced aircraft control. Operators and maintenance organizations must comply to ensure engine reliability and safety. Compliance with this directive is essential to maintain regulatory approval for aircraft operation.
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