Excessive Vibration is Eliminated

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

a person wearing a helmet

Inspection Uncovers Looseness

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.

Root Cause Analysis

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.