SymphonyAI Industrial was called on to help in the diagnosis of a suspected gearbox problem in a large plant connected with the paper industry.

The lubricating oil in the gearbox was regularly subjected to analysis, and the last report stated that there were iron particles in the oil. The maintenance supervisor asked if we
could determine the source of the oil contamination, and the first thing we did was to examine the vibration spectra measured near the bearings. The spectra looked normal,
without evidence of bearing tones, so we suspected that the metal was coming from one or more of the gears.