They are definitely going to give up revenue to accomplish preventative maintenance, if that maintenance can not be done any other way (i.e. in drydock), in order to prevent a greater loss of revenue if they defer that maintenance until the system fails and more than one cruise is affected (as happened in the past with several of RCI's ships that have had actual bearing failures).   The "signs of a problem" was that based on past performance, the time when a possible failure of the bearings is c