As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE FLIGHT VIBRATION ENGINE 1 REACHED 4.5 UNITS. HIGH VIBRATION CHECKLIST WAS PERFORMED. CORRECTIVE ACTION: HAS BEEN PERFORMED FIM 71-05 TASK 808 AND PERFORMED TEST 7, VIBRATION SURVEY IAW AMM TASK 71-00-00-700-814-F00 NO DISCREPANCIES FOUND.