B747-400 Engine after landing at Man 21/6
I today came back on a flight from Barbados I noticed shortly after we arrived at the gate at MAN the right outer engine (4?) engine cowling was opened with an engineer inspecting it. The engineer was operating a hand pump from the ground with a hose leading to the engine almost like it was a big pump foot pump however operated by hand. The captain was also down there having a look so wondered what this could of been if anything?