As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS NOT DECLARED DUE TO: DURING CLIMBOUT NUMBER 1 ENGINE VIBRATIONS FLUCTUATED WILDLY OSCILLATING BETWEEN 2.0 AND 3.5, ENGINE NUMBER 1 HAVING VIBRATIONS ISSUES RECENTLY. AIRCRAFT AIR INTERRUPTED BACK TO AND LANDED SAFELY AT MIA. (OPEN).