What is this on the Trent 1000?

Let’s check out the 787 at Pima Air and Space Museum and it’s Trent 1000 engines #787 #boeing #trent1000 #pimaairandspacemuseum #boneyardsafari #aviationsafari #aviationpreservation #aviationadventures

https://video.wixstatic.com/video/44d869_5f8549b55bb5419bb37ffcedc9ff8d9e/360p/mp4/file.mp4