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RR Trent engine on A330neo

What is the purpose of the little probe seen under the A330neo?

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On the Rolls-Royce TRENT 7XX-8XX and RB-221-5XX, that is the "Engine Breather Outlet".

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Cite: https://www.scribd.com/doc/283987010/A330-ATA-71-80-RR-Trent-700-L3-e-pdf# (page 44)

Possibly relevant: What is the function of the protruding outlet on the Trent XWB?

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  • $\begingroup$ So this would be almost similar to the long breather tube on the 737 CFM56. $\endgroup$
    – Boeing787
    May 24, 2023 at 3:56

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