As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT CRUISE 31 ENGINE VIBRATION OCCURRED & IFSD WAS CONDUCTED. FLIGHT CREW REPORTED A RUBBER ODOR & SUSPECTED THE AUTO THROTTLE CLUTCHES. AFTER AUTO THROTTLES WERE TURNED OFF, THE ODOR DISSIPATED, BUT THE NR 1 ENG BEGAN TO VIBRATE HEAVILY. THE ENGINE WAS SHUTDOWN & THE FLIGHT DIVERTED. R & R LT ENG IAW TASK CARDS 71-080-003 & 71-070-001. OPERATIONS CHECKED NORMAL.