As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR TURN BACK DUE TO LEFT ENGINE VIBRATIONS WITH AN ASSOCIATED ODOR REPORTED BY THE FLIGHT CREW. MAINTENANCE REPLACED THE LEFT ENGINE DUE TO INLET DAMAGE IAW T/C 7100-004423LH ON LOG PAGE 1578973. OPS AND LEAK CHECK GOOD. (LOG 7984276 - AIRCRAFT WAS GROUNDED).