After startup, the pump showed elevated vibration at turning speed, reaching approximately 1.5 in/sec. This pattern is commonly associated with structural looseness, particularly at the pump hold-down bolts.

The CME recommended inspecting the pump mounting hardware and verifying that all hold-down bolts were properly secured.

Inspection confirmed that two hold-down bolts were loose. After tightening, vibration levels decreased significantly from 1.5 in/sec to 0.5 in/sec, confirming looseness as the root cause. The issue was resolved.