The pump is restarted. Vibration amplitudes drop by 71%. Further observation shows a consistent trend of operation within acceptable limits.

The end-user inspects the bearing housing and finds that the hold-down bolts are only finger tight. The bearing housing is retightened to the correct amount.

The vibration amplitudes at the outboard bearing housing exceed the alarm limit of 0.3 in/s

The Centaur engineering team informs the end-user that they suspect a structural looseness might be the cause of the elevated vibration. The recommendation is made to inspect the outboard bearing housing for loose bolts.

The Centaur team continues to monitor and analyze the site data from their Monitoring & Diagnostic Center in Chicago.