It's difficult....

Here on top of the lube-oiltank at unit EC3: discussion about the change-over system of the lube oilfilters.
We have some loss of pressure between the pumps and the lube oil supplyheader to the bearings.
It causes the unit to trip so we have to do something about it. We did an RCA on it and now we suspect an orifice but to be sure we have to eliminate everything else. The orifice is inside the tank so we have to be very careful opening it. When something falls in we have to empty the complete tank and then we have to order some tank cars because it's 45 cubic meters....

Here in LARGE....