As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT, PERFORMED AN AIR TURN BACK DUE TO F/O INSTRUMENT FAILURE FOLLOWED BY ACFT SHUTTER AND YAW. CREW ALSO REPORTED LT ENG RUMBLE/SURGE AND LT ENG LIMIT EICAS MESSAGE. FOUND M10375 F/O INST BUS VOLT SENSE UNIT BLOWN OUT. REPLACED F/O INSTRUMENT BUS VOLTAGE SENSE UNIT M10375 IAW AMM 24-51-08. TESTS GOOD.