As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW REPORTED THAT ON CLIMB OUT THEY RECEIVED TRIM MAIN INOP AND BACKUP INOP EICAS MESSAGE. THE CREW DECLARED AN EMERGENCY AND COMPLIED WITH AOM VOL 1 PROCEDURES. THE CREW WAS ABLE TO RECOVER THE BACKUP PITCH TRIM AND CONTINUED TO CVG. THE ACFT LANDED WITHOUT INCIDENT. THE ACFT WAS REMOVED FROM SERVICE. R & R THE HORIZONTAL STAB CONTROL UNIT IAW AMM 27-40-01. THE OPS CHECK WAS GOOD. THE ACFT WAS RETURNED TO SERVICE.