EASA AD 2019-0113
Engine Fuel & Control — Engine Electronic Control Software — Update
Summary
EASA Airworthiness Directive 2019-0113 is an official directive addressing Rolls-Royce RB211 Trent 970-84, 972-84, and 972E-84 engines, commonly installed on Airbus A380 aircraft. The directive mandates an update to the engine electronic controller (EEC) software to version 12.3 or later to enhance safety. This update targets the intermediate pressure turbine over-speed system to prevent potential engine failures.
What Changed
This new directive introduces a mandatory update of the EEC software from version 12.2 or earlier to version 12.3 or later. It prohibits operation of engines with affected software beyond specified deadlines and forbids mixing different software versions on the same aircraft. The directive also sets clear group classifications for engines based on their installed software versions.
Why It Matters
The update is critical to prevent intermediate pressure turbine shaft failures that could lead to turbine disc bursts and release of high-energy debris, posing significant safety risks. Operators and maintenance organizations must ensure compliance to avoid potential in-flight engine damage and maintain airworthiness. The directive ensures continued safe operation of affected Trent 900 engines and compliance with European aviation safety regulations.
What To Do
Operators must update the EEC software on Group 1 engines within three months of 1 June 2019, the effective date. Installation of engines or EECs with affected software is only allowed if updated to serviceable software before first operation. Mixing of software versions 12.3 and earlier than 12.2 on the same aircraft is prohibited from the effective date onward.
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