EASA SIB 2024-10
Aeroshell Ascender Oil Type — Removal from the List of Oil Types Approved for Rolls-Royce Trent XWB Engines
Summary
EASA Safety Information Bulletin 2024-10 is a safety information bulletin addressing the removal of Aeroshell Ascender oil type from the list of approved oils for Rolls-Royce Trent XWB-84 and Trent XWB-97 engines. This bulletin applies to all serial numbers of Rolls-Royce Deutschland Ltd & Co KG Trent XWB-75, Trent XWB-79, Trent XWB-79B, Trent XWB-84, and Trent XWB-97 engines. It informs operators about updated guidance related to engine oil types to ensure safe engine operation.
What Changed
EASA SIB 2024-10 communicates that Aeroshell Ascender oil type has been removed from the approved oil list for Trent XWB-84 and Trent XWB-97 engines due to its impact on reducing differential oil pressure. Rolls-Royce updated its Engine Oils Manual accordingly and issued Notice to Operators 336 to reflect this change. The bulletin does not mandate an Airworthiness Directive but provides important safety information.
Why It Matters
This change is critical for aviation professionals because using Aeroshell Ascender oil on certain Trent XWB engines can reduce oil pressure margins, potentially leading to bearing chamber fires and engine shutdown. Operators, maintenance organizations, and compliance teams must be aware of this to prevent unsafe engine operation and ensure adherence to updated manufacturer guidance. It helps maintain engine reliability and safety without triggering mandatory regulatory action.
What To Do
Operators of Rolls-Royce Trent XWB engines should review the updated Rolls-Royce Engine Oils Manual issue 008 dated 14 August 2024 or later revisions and ensure that Aeroshell Ascender oil is no longer used on Trent XWB-84 and Trent XWB-97 engines. They should follow the updated oil usage instructions and consult Rolls-Royce representatives or EASA contacts for further information. There are no mandatory compliance deadlines, but prompt adherence is recommended.